{"id":5427,"date":"2022-08-01T13:07:07","date_gmt":"2022-08-01T13:07:07","guid":{"rendered":"https:\/\/longchangchemical.com\/?p=5427"},"modified":"2026-04-28T10:42:05","modified_gmt":"2026-04-28T10:42:05","slug":"basic-theory-of-surfactants-i","status":"publish","type":"post","link":"https:\/\/longchangchemical.com\/hu\/basic-theory-of-surfactants-i\/","title":{"rendered":"A fel\u00fcletakt\u00edv anyagok alapelm\u00e9lete (I)"},"content":{"rendered":"<p>I. N\u00e9h\u00e1ny fogalom a fel\u00fcletakt\u00edv anyagokr\u00f3l.<\/p>\n<p>Az old\u00f3szer fel\u00fcleti fesz\u00fclts\u00e9g\u00e9t cs\u00f6kkenteni k\u00e9pes tulajdons\u00e1got nevezz\u00fck fel\u00fcleti aktivit\u00e1snak, a fel\u00fcleti aktivit\u00e1ssal rendelkez\u0151 anyagot pedig fel\u00fcletakt\u00edv anyagnak. Azt a fel\u00fcletakt\u00edv anyagot, amely k\u00e9pes a molekul\u00e1k vizes oldatban t\u00f6rt\u00e9n\u0151 t\u00e1rsul\u00e1s\u00e1ra, micell\u00e1k \u00e9s egy\u00e9b t\u00e1rsul\u00e1sok kialak\u00edt\u00e1s\u00e1ra, \u00e9s nagy fel\u00fcleti aktivit\u00e1ssal rendelkezik, valamint nedves\u00edt\u0151, emulge\u00e1l\u00f3, habos\u00edt\u00f3 \u00e9s mos\u00f3 funkci\u00f3val is rendelkezik, fel\u00fcletakt\u00edv anyagnak nevezz\u00fck. A folyad\u00e9k fel\u00fclet\u00e9n egy egys\u00e9gnyi hossz\u00fas\u00e1gra hat\u00f3 \u00f6sszeh\u00faz\u00f3 er\u0151t fel\u00fcleti fesz\u00fclts\u00e9gnek nevezz\u00fck, m\u00e9rt\u00e9kegys\u00e9ge N-m-1.<\/p>\n<p>M\u00e1sodszor, a fel\u00fcletakt\u00edv anyagok molekulaszerkezeti jellemz\u0151i.<\/p>\n<p>A fel\u00fcletakt\u00edv anyagok olyan speci\u00e1lis szerkezet\u0171 \u00e9s tulajdons\u00e1g\u00fa szerves vegy\u00fcletek, amelyek k\u00e9pesek jelent\u0151sen megv\u00e1ltoztatni a k\u00e9t f\u00e1zis k\u00f6z\u00f6tti hat\u00e1rfel\u00fcleti fesz\u00fclts\u00e9get vagy egy folyad\u00e9k (\u00e1ltal\u00e1ban v\u00edz) fel\u00fcleti fesz\u00fclts\u00e9g\u00e9t, \u00e9s olyan tulajdons\u00e1gokkal rendelkeznek, mint a nedves\u00edt\u00e9s, habz\u00e1s, emulge\u00e1l\u00e1s \u00e9s mos\u00e1s. Szerkezet\u00fcket tekintve a fel\u00fcletakt\u00edv anyagok k\u00f6z\u00f6s jellemz\u0151je, hogy molekul\u00e1ik k\u00e9t k\u00fcl\u00f6nb\u00f6z\u0151 tulajdons\u00e1g\u00fa csoportot tartalmaznak, egyik v\u00e9g\u00fck egy hossz\u00fa l\u00e1nc\u00fa, nem pol\u00e1ris csoport, amely olajban old\u00f3dik, de v\u00edzben nem old\u00f3dik, m\u00e1s n\u00e9ven hidrof\u00f3b csoport vagy v\u00edztasz\u00edt\u00f3 csoport. A spektrum m\u00e1sik v\u00e9ge a v\u00edzben old\u00f3d\u00f3 csoportok, azaz a hidrofil csoportok vagy hidrofil csoportok. A hidrofil csoportnak kell\u0151en hidrofilnek kell lennie ahhoz, hogy a teljes fel\u00fcletakt\u00edv anyag v\u00edzben old\u00f3d\u00f3 legyen, \u00e9s megfelel\u0151 oldhat\u00f3s\u00e1ggal rendelkezzen. Mivel a fel\u00fcletakt\u00edv anyagok hidrofil \u00e9s hidrof\u00f3b csoportokat is tartalmaznak, ez\u00e9rt legal\u00e1bb az egyik folyad\u00e9kf\u00e1zisban old\u00f3dnak. A hidrofil \u00e9s lipofil tenzideknek ezt a tulajdons\u00e1g\u00e1t amfifilit\u00e1snak nevezz\u00fck.<\/p>\n<p>A piacon van egy speci\u00e1lis t\u00edpus\u00fa bifil tenzid is, amelynek egyik reprezentat\u00edv term\u00e9ke a kynurenin-glikol tenzid. Ez k\u00e9t p\u00e1r hidrof\u00f3b \u00e9s hidrofil csoportot tartalmaz, amelyek szerkezetileg egy szimmetrikus \u00e9s viszonylag \"merev\" funkci\u00f3s csoporttal kapcsol\u00f3dnak egym\u00e1shoz k\u00f6z\u00e9pen. A bionos tenzidek kev\u00e9sb\u00e9 stabil habot k\u00e9peznek, \u00e9s specifikusan kiemelked\u0151 dinamikus nedves\u00edthet\u0151s\u00e9ggel rendelkeznek.<\/p>\n<p>A fel\u00fcletakt\u00edv anyagok t\u00edpusai.<\/p>\n<p>A fel\u00fcletakt\u00edv anyag egy amfifil molekula, amely hidrof\u00f3b \u00e9s hidrofil csoportokkal egyar\u00e1nt rendelkezik. A fel\u00fcletakt\u00edv anyagok hidrof\u00f3b csoportjai \u00e1ltal\u00e1ban hossz\u00fa sz\u00e9nhidrog\u00e9nl\u00e1ncokb\u00f3l \u00e1llnak, mint p\u00e9ld\u00e1ul egyenes l\u00e1nc\u00fa C8-C20 alkil, el\u00e1gaz\u00f3 l\u00e1nc\u00fa C8-C20 alkil, alkil-benzol csoportok (8-16 sz\u00e9natomsz\u00e1m\u00fa alkil) stb. A hidrof\u00f3b csoportok k\u00fcl\u00f6nbs\u00e9ge f\u0151k\u00e9nt a sz\u00e9nhidrog\u00e9nl\u00e1ncok szerkezeti v\u00e1ltoz\u00e1s\u00e1ban rejlik, amely kisebb, m\u00edg a hidrofil csoportok v\u00e1ltozatoss\u00e1ga nagyobb. Ez\u00e9rt a fel\u00fcletakt\u00edv anyagok tulajdons\u00e1gai a hidrof\u00f3b csoportok m\u00e9rete \u00e9s alakja mellett els\u0151sorban a hidrofil csoportokkal f\u00fcggenek \u00f6ssze. A hidrofil csoportok szerkezete jobban v\u00e1ltozik, mint a hidrof\u00f3b csoportok\u00e9, ez\u00e9rt a fel\u00fcletakt\u00edv anyagok oszt\u00e1lyoz\u00e1sa \u00e1ltal\u00e1ban a hidrofil csoportok szerkezet\u00e9n alapul. Ez az oszt\u00e1lyoz\u00e1s azon alapul, hogy a hidrofil csoport ionos-e vagy sem, \u00e9s anionos, kationos, nemionos, amfoter \u00e9s egy\u00e9b speci\u00e1lis tenzidekre oszlik.<\/p>\n<p>IV. A fel\u00fcletakt\u00edv anyagok vizes oldat\u00e1nak jellemz\u0151i.<\/p>\n<p>1. Fel\u00fcletakt\u00edv anyag adszorpci\u00f3ja a hat\u00e1rfel\u00fcleten. A fel\u00fcletakt\u00edv molekul\u00e1k lipofil \u00e9s hidrofil csoportokkal rendelkeznek, amelyek amfifil molekul\u00e1k. A v\u00edz er\u0151sen pol\u00e1ros folyad\u00e9k, \u00e9s amikor a fel\u00fcletakt\u00edv anyagot v\u00edzben oldj\u00e1k, hidrofil csoportja a polarit\u00e1s hasonl\u00f3s\u00e1g\u00e1nak \u00e9s tasz\u00edt\u00e1s\u00e1nak elve szerint vonz\u00f3dik a v\u00edzhez \u00e9s felold\u00f3dik a v\u00edzben, lipofil csoportja pedig tasz\u00edtja a vizet \u00e9s elhagyja a vizet, ennek eredm\u00e9nyek\u00e9nt a fel\u00fcletakt\u00edv anyag molekul\u00e1k (vagy ionok) adszorbe\u00e1l\u00f3dnak a k\u00e9t f\u00e1zis hat\u00e1rfel\u00fclet\u00e9n, \u00edgy a k\u00e9t f\u00e1zis k\u00f6z\u00f6tti hat\u00e1rfel\u00fcleti fesz\u00fclts\u00e9g cs\u00f6kken. Min\u00e9l t\u00f6bb fel\u00fcletakt\u00edv molekula (vagy ion) adszorbe\u00e1l\u00f3dik a hat\u00e1rfel\u00fcleten, ann\u00e1l nagyobb a hat\u00e1rfel\u00fcleti fesz\u00fclts\u00e9g cs\u00f6kken\u00e9se.<\/p>\n<p>2\u3001Az adszorpci\u00f3s membr\u00e1n n\u00e9h\u00e1ny tulajdons\u00e1ga.<\/p>\n<p>Az adszorpci\u00f3s film fel\u00fcleti nyom\u00e1sa: a fel\u00fcletakt\u00edv anyag adszorbe\u00e1l\u00f3dik a g\u00e1z-folyad\u00e9k hat\u00e1rfel\u00fcleten, hogy adszorpci\u00f3s filmet k\u00e9pezzen, p\u00e9ld\u00e1ul egy s\u00farl\u00f3d\u00e1smentes mozgathat\u00f3 \u00fasz\u00f3t helyez\u00fcnk a hat\u00e1rfel\u00fcletre, hogy az adszorpci\u00f3s filmet az oldat felsz\u00edne ment\u00e9n toljuk, a film nyom\u00e1st gyakorol az \u00fasz\u00f3ra, \u00e9s ezt a nyom\u00e1st fel\u00fcleti nyom\u00e1snak nevezz\u00fck.<\/p>\n<p>Fel\u00fcleti viszkozit\u00e1s: a fel\u00fcleti nyom\u00e1ssal megegyez\u0151en a fel\u00fcleti viszkozit\u00e1s az oldhatatlan molekul\u00e1ris film tulajdons\u00e1ga. Felf\u00fcggeszt\u00e9se egy finom f\u00e9mhuzal platina gy\u0171r\u0171, \u00fagy, hogy a s\u00edk \u00e9rintkezik a v\u00edz felsz\u00edn\u00e9n a tart\u00e1ly, forgatni a platina gy\u0171r\u0171, a platina gy\u0171r\u0171 a viszkozit\u00e1s a v\u00edz akad\u00e1ly, amplit\u00fad\u00f3 fokozatosan cs\u00f6kken, amely szerint a fel\u00fcleti viszkozit\u00e1s lehet m\u00e9rni, a m\u00f3dszer: el\u0151sz\u00f6r tiszta v\u00edz fel\u00fcleti k\u00eds\u00e9rletek, m\u00e9rt amplit\u00fad\u00f3 cs\u00f6kken\u00e9s, majd m\u00e9rt kialakul\u00e1s\u00e1t fel\u00fcleti film cs\u00f6kken\u00e9s, a k\u00fcl\u00f6nbs\u00e9g a kett\u0151 k\u00f6z\u00f6tt, hogy megtal\u00e1lja a viszkozit\u00e1s a fel\u00fcleti film. A fel\u00fcleti viszkozit\u00e1s szorosan kapcsol\u00f3dik a fel\u00fcleti film szil\u00e1rds\u00e1g\u00e1hoz, mivel az adszorpci\u00f3s filmnek fel\u00fcleti nyom\u00e1sa \u00e9s viszkozit\u00e1sa van, rugalmasnak kell lennie. Min\u00e9l nagyobb a fel\u00fcleti nyom\u00e1s \u00e9s min\u00e9l nagyobb az adszorbe\u00e1lt film viszkozit\u00e1sa, ann\u00e1l nagyobb a rugalmass\u00e1gi modulusa. A fel\u00fcleti adszorpci\u00f3s film rugalmass\u00e1gi modulus\u00e1nak fontos jelent\u0151s\u00e9ge van a bubor\u00e9k stabiliz\u00e1l\u00e1s\u00e1nak folyamat\u00e1ban.<\/p>\n<p>3\u3001A micell\u00e1k k\u00e9pz\u0151d\u00e9se.<\/p>\n<p>A fel\u00fcletakt\u00edv anyag h\u00edg oldata az ide\u00e1lis oldat \u00e1ltal k\u00f6vetett t\u00f6rv\u00e9nynek engedelmeskedik. Az oldat fel\u00fclet\u00e9n adszorbe\u00e1l\u00f3d\u00f3 fel\u00fcletakt\u00edv anyag mennyis\u00e9ge az oldat koncentr\u00e1ci\u00f3j\u00e1val n\u0151, \u00e9s amikor a koncentr\u00e1ci\u00f3 el\u00e9r vagy meghalad egy bizonyos \u00e9rt\u00e9ket, az adszorpci\u00f3 mennyis\u00e9ge m\u00e1r nem n\u00f6vekszik. Ezek a felesleges tenzidmolekul\u00e1k rendezetlenek az oldatban, vagy valamilyen szab\u00e1lyos m\u00f3don l\u00e9teznek. A gyakorlat \u00e9s az elm\u00e9let is azt sugallja, hogy az oldatban t\u00e1rsul\u00e1sokat alkotnak, amelyeket micell\u00e1knak nevez\u00fcnk. A tenzideknek az oldatban a micell\u00e1k kialakul\u00e1s\u00e1hoz sz\u00fcks\u00e9ges minim\u00e1lis koncentr\u00e1ci\u00f3j\u00e1t kritikus micellakoncentr\u00e1ci\u00f3nak (CMC) nevezik.<\/p>\n<p>&nbsp;<\/p>\n<p>A HLB a hidrofil-lipofil egyens\u00faly r\u00f6vid\u00edt\u00e9se, amely a fel\u00fcletakt\u00edv anyag hidrofil \u00e9s lipofil csoportjainak hidrofil \u00e9s lipofil egyens\u00faly\u00e1t, azaz a fel\u00fcletakt\u00edv anyag HLB-\u00e9rt\u00e9k\u00e9t jelzi. a nagy HLB-\u00e9rt\u00e9k er\u0151s hidrofil molekul\u00e1ra \u00e9s gyenge lipofil molekul\u00e1ra utal; ford\u00edtva, er\u0151s lipofil molekula \u00e9s gyenge hidrofil molekula. A HLB-\u00e9rt\u00e9k egy relat\u00edv \u00e9rt\u00e9k, \u00edgy a HLB-\u00e9rt\u00e9k be\u00e1ll\u00edt\u00e1sakor a hidrofil tulajdons\u00e1gokkal nem rendelkez\u0151 paraffin HLB-\u00e9rt\u00e9ke 0, m\u00edg a v\u00edzben jobban old\u00f3d\u00f3 n\u00e1triumdodecil-szulf\u00e1t HLB-\u00e9rt\u00e9ke 40. A HLB-\u00e9rt\u00e9ket a v\u00edzben jobban old\u00f3d\u00f3 n\u00e1triumdodecil-szulf\u00e1t HLB-\u00e9rt\u00e9ke 40. \u00c1ltal\u00e1noss\u00e1gban elmondhat\u00f3, hogy a 10-n\u00e9l kisebb HLB \u00e9rt\u00e9k\u0171 emulge\u00e1l\u00f3szerek lipofilek, m\u00edg a 10-n\u00e9l nagyobb \u00e9rt\u00e9k\u0171ek hidrofilek. Ez\u00e9rt a lipofil \u00e9s hidrofil k\u00f6z\u00f6tti fordul\u00f3pont k\u00f6r\u00fclbel\u00fcl 10-n\u00e9l van.<\/p>\n<p>&nbsp;<\/p>\n<p>A fel\u00fcletakt\u00edv anyag HLB-\u00e9rt\u00e9ke alapj\u00e1n a lehets\u00e9ges felhaszn\u00e1l\u00e1si m\u00f3dok nagyj\u00e1b\u00f3l \u00e9rtelmezhet\u0151k, amint az a bal oldali t\u00e1bl\u00e1zatban l\u00e1that\u00f3, a v\u00edz az olajban emulge\u00e1l\u00f3szerk\u00e9nt val\u00f3 felhaszn\u00e1l\u00e1sra alkalmas fel\u00fcletakt\u00edv anyag HLB-\u00e9rt\u00e9ke 3,5 \u00e9s 6 k\u00f6z\u00f6tt van, m\u00edg a v\u00edz az olajban emulge\u00e1l\u00f3szer HLB-\u00e9rt\u00e9ke 8 \u00e9s 18 k\u00f6z\u00f6tt van.<\/p>\n<p>&nbsp;<\/p>\n<p>\u00d6t\u00f6dsz\u00f6r, az emulge\u00e1l\u00e1s \u00e9s a szolubiliz\u00e1ci\u00f3 szerepe.<\/p>\n<p>K\u00e9t k\u00f6lcs\u00f6n\u00f6sen oldhatatlan folyad\u00e9k, amelyek k\u00f6z\u00fcl az egyikben r\u00e9szecsk\u00e9k (cseppek vagy folyad\u00e9kkrist\u00e1lyok) diszperg\u00e1l\u00f3dnak a m\u00e1sikban, \u00e9s emulzi\u00f3nak nevezett rendszert alkotnak. Az emulzi\u00f3 kialakul\u00e1sa miatt a n\u00f6veked\u00e9s a hat\u00e1rfel\u00fclet a k\u00e9t folyad\u00e9k, \u00edgy ez a rendszer termodinamikailag instabil, annak \u00e9rdek\u00e9ben, hogy az emulzi\u00f3 stabil kell hozz\u00e1adni egy harmadik komponens - emulge\u00e1l\u00f3szer, hogy cs\u00f6kkentse a hat\u00e1rfel\u00fcleti energia a rendszer. Az emulge\u00e1l\u00f3szer a fel\u00fcletakt\u00edv anyagok k\u00f6z\u00e9 tartozik, f\u0151 feladata az emulzi\u00f3 szerep\u00e9nek bet\u00f6lt\u00e9se. Emulzi\u00f3 jelenl\u00e9t\u00e9ben cseppek, hogy a f\u00e1zis az \u00fagynevezett diszperg\u00e1lt f\u00e1zis (vagy bels\u0151 f\u00e1zis \ufe51 diszkontinuus f\u00e1zis), kapcsol\u00f3dik egy m\u00e1sik f\u00e1zishoz, amelyet diszperzi\u00f3s k\u00f6zegnek nevez\u00fcnk (vagy k\u00fcls\u0151 f\u00e1zis \ufe51 folytonos f\u00e1zis).<\/p>\n<p>1, emulge\u00e1l\u00f3szerek \u00e9s emulzi\u00f3k. K\u00f6z\u00f6s emulzi\u00f3, az egyik f\u00e1zis v\u00edz vagy vizes oldat, a m\u00e1sik f\u00e1zis nem keverhet\u0151 a v\u00edzzel szerves anyagok, mint p\u00e9ld\u00e1ul zs\u00edr, viasz, stb.. V\u00edz \u00e9s olaj emulzi\u00f3k k\u00e9pz\u0151d\u00f6tt, szerint a diszperzi\u00f3 lehet osztani k\u00e9tf\u00e9le: olaj diszperg\u00e1lt v\u00edzben, hogy egy olaj-v\u00edzben emulzi\u00f3, hogy O \/ W (olaj \/ v\u00edz): v\u00edz diszperg\u00e1lt olajban, hogy egy olaj-v\u00edzben emulzi\u00f3, hogy W \/ O (v\u00edz \/ olaj) mondta. Komplex v\u00edz-olaj-v\u00edzben W\/O\/W t\u00edpus\u00fa \u00e9s olaj-v\u00edzben-olajban O\/W\/O t\u00edpus\u00fa t\u00f6bbsz\u00f6r\u00f6s emulzi\u00f3k is k\u00e9pz\u0151dhetnek.<\/p>\n<p>Az emulge\u00e1l\u00f3szereket az emulzi\u00f3k stabiliz\u00e1l\u00e1s\u00e1ra haszn\u00e1lj\u00e1k a hat\u00e1rfel\u00fcleti fesz\u00fclts\u00e9g cs\u00f6kkent\u00e9s\u00e9vel \u00e9s egymolekul\u00e1s hat\u00e1rfel\u00fcleti filmek kialak\u00edt\u00e1s\u00e1val. Az emulge\u00e1l\u00e1sban az emulge\u00e1l\u00f3szer k\u00f6vetelm\u00e9nyei: a, az emulge\u00e1l\u00f3szer k\u00e9pesnek kell lennie arra, hogy adszorbe\u00e1l\u00f3djon vagy gazdag\u00edtsa a k\u00e9t f\u00e1zis k\u00f6z\u00f6tti hat\u00e1rfel\u00fcletet, hogy a hat\u00e1rfel\u00fcleti fesz\u00fclts\u00e9g cs\u00f6kkenjen; b, az emulge\u00e1l\u00f3szer kell adni a r\u00e9szecsk\u00e9k a t\u00f6lt\u00e9s, hogy az elektrosztatikus tasz\u00edt\u00e1s a r\u00e9szecsk\u00e9k k\u00f6z\u00f6tt, vagy a kialakul\u00e1sa egy stabil \ufe51 viszkozit\u00e1s k\u00f6r\u00fcl a r\u00e9szecsk\u00e9k egy k\u00fcl\u00f6n\u00f6sen magas v\u00e9d\u0151film. Ez\u00e9rt az emulge\u00e1l\u00f3szerk\u00e9nt haszn\u00e1lt anyagnak amfifil csoportokkal kell rendelkeznie az emulge\u00e1l\u00e1shoz, \u00e9s a fel\u00fcletakt\u00edv anyagok megfelelnek ennek a k\u00f6vetelm\u00e9nynek.<\/p>\n<p>2, az emulzi\u00f3k\u00e9sz\u00edt\u00e9si m\u00f3dszerek \u00e9s az emulzi\u00f3k stabilit\u00e1s\u00e1t befoly\u00e1sol\u00f3 t\u00e9nyez\u0151k.<\/p>\n<p>Az emulzi\u00f3k el\u0151\u00e1ll\u00edt\u00e1s\u00e1nak k\u00e9t m\u00f3dszere van: az egyik a mechanikai m\u00f3dszer, amellyel a folyad\u00e9kot apr\u00f3 r\u00e9szecsk\u00e9k form\u00e1j\u00e1ban diszperg\u00e1lj\u00e1k egy m\u00e1sik folyad\u00e9kban, amit az iparban legink\u00e1bb emulzi\u00f3k el\u0151\u00e1ll\u00edt\u00e1s\u00e1ra haszn\u00e1lnak; a m\u00e1sik m\u00f3dszer, amikor a folyad\u00e9kot molekul\u00e1ris \u00e1llapotban feloldj\u00e1k egy m\u00e1sik folyad\u00e9kban, majd megfelel\u0151en \u00f6sszegy\u0171jtik, hogy emulzi\u00f3t k\u00e9pezzenek.<\/p>\n<p>Az emulzi\u00f3 stabilit\u00e1sa az a k\u00e9pess\u00e9g, hogy ellen\u00e1ll a r\u00e9szecsk\u00e9k aggreg\u00e1ci\u00f3j\u00e1nak, amely f\u00e1zissz\u00e9tv\u00e1l\u00e1shoz vezetne. Az emulzi\u00f3k termodinamikailag instabil rendszerek, nagy szabad energi\u00e1kkal. Ez\u00e9rt az emulzi\u00f3 \u00fagynevezett stabilit\u00e1sa val\u00f3j\u00e1ban az az id\u0151, amely alatt a rendszer egyens\u00falyi \u00e1llapotba ker\u00fcl, azaz az az id\u0151, amely alatt a rendszerben l\u00e9v\u0151 folyad\u00e9kok egyik\u00e9nek sz\u00e9tv\u00e1l\u00e1sa bek\u00f6vetkezik. Ha a hat\u00e1rfel\u00fcleti membr\u00e1nban pol\u00e1ros szerves molekul\u00e1k, p\u00e9ld\u00e1ul zs\u00edralkoholok, zs\u00edrsavak \u00e9s zs\u00edraminok vannak, a membr\u00e1n szil\u00e1rds\u00e1ga jelent\u0151sen megn\u0151. Ez az\u00e9rt van, mert a hat\u00e1rfel\u00fcleti adszorpci\u00f3s r\u00e9tegben az emulge\u00e1l\u00f3szer-molekul\u00e1k \u00e9s az alkoholok, savak \u00e9s aminok \u00e9s m\u00e1s pol\u00e1ris molekul\u00e1k \"komplexet\" alkotnak, \u00edgy a hat\u00e1rfel\u00fcleti membr\u00e1n szil\u00e1rds\u00e1ga megn\u00f6vekszik.<\/p>\n<p>Az emulge\u00e1l\u00f3szerb\u0151l \u00e1ll\u00f3 t\u00f6bb mint k\u00e9tf\u00e9le fel\u00fcletakt\u00edv anyagot vegyes emulge\u00e1l\u00f3szernek nevezik. A vegyes emulge\u00e1l\u00f3szer a v\u00edz\/olaj hat\u00e1rfel\u00fcleten adszorbe\u00e1l\u00f3dik, intermolekul\u00e1ris hat\u00e1suk komplexeket k\u00e9pezhet. Az er\u0151s intermolekul\u00e1ris hat\u00e1s miatt a hat\u00e1rfel\u00fcleti fesz\u00fclts\u00e9g jelent\u0151sen cs\u00f6kken, a hat\u00e1rfel\u00fcleten adszorbe\u00e1l\u00f3dott emulge\u00e1l\u00f3szer mennyis\u00e9ge jelent\u0151sen megn\u0151, a hat\u00e1rfel\u00fcleti film s\u0171r\u0171s\u00e9ge n\u0151, a szil\u00e1rds\u00e1g n\u0151.<\/p>\n<p>A foly\u00e9kony gy\u00f6ngy\u00f6k t\u00f6lt\u00e9se jelent\u0151s hat\u00e1ssal van az emulzi\u00f3 stabilit\u00e1s\u00e1ra. Stabil emulzi\u00f3k, a foly\u00e9kony gy\u00f6ngy\u00f6k \u00e1ltal\u00e1ban t\u00f6lt\u00f6ttek. Amikor ionos emulge\u00e1l\u00f3szer, adszorbe\u00e1l\u00f3dik a hat\u00e1rfel\u00fcleten az emulge\u00e1l\u00f3szer ion lipofil csoportja beillesztett az olajf\u00e1zisba, hidrofil csoport a v\u00edzf\u00e1zisban, \u00edgy a foly\u00e9kony gy\u00f6ngy\u00f6k t\u00f6lt\u00f6tt. Mivel az emulzi\u00f3 a foly\u00e9kony gy\u00f6ngy\u00f6k azonos t\u00f6lt\u00e9ssel, tasz\u00edtj\u00e1k egym\u00e1st, nem k\u00f6nny\u0171 agglomer\u00e1l\u00f3dni, \u00edgy a stabilit\u00e1s megn\u0151. L\u00e1that\u00f3, hogy min\u00e9l t\u00f6bb emulge\u00e1l\u00f3szer-ion adszorbe\u00e1l\u00f3dik a gy\u00f6ngy\u00f6k\u00f6n, ann\u00e1l nagyobb a t\u00f6lt\u00e9s, ann\u00e1l nagyobb a gy\u00f6ngy\u00f6k agglomer\u00e1ci\u00f3j\u00e1nak megakad\u00e1lyoz\u00e1s\u00e1ra val\u00f3 k\u00e9pess\u00e9g, ann\u00e1l stabilabb az emulzi\u00f3s rendszer.<\/p>\n<p>Az emulzi\u00f3s diszperzi\u00f3s k\u00f6zeg viszkozit\u00e1sa bizonyos m\u00e9rt\u00e9kben befoly\u00e1solja az emulzi\u00f3 stabilit\u00e1s\u00e1t. \u00c1ltal\u00e1ban min\u00e9l nagyobb a diszperzi\u00f3s k\u00f6zeg viszkozit\u00e1sa, ann\u00e1l nagyobb az emulzi\u00f3 stabilit\u00e1sa. Ennek oka, hogy a diszperzi\u00f3s k\u00f6zeg viszkozit\u00e1sa nagy, ami nagy hat\u00e1ssal van a folyad\u00e9kgy\u00f6ngy\u00f6k Brown-mozg\u00e1s\u00e1ra, \u00e9s lelass\u00edtja a folyad\u00e9kgy\u00f6ngy\u00f6k k\u00f6z\u00f6tti \u00fctk\u00f6z\u00e9st, \u00edgy a rendszer stabil marad. \u00c1ltal\u00e1ban az emulzi\u00f3kban oldhat\u00f3 polimer anyagok n\u00f6velhetik a rendszer viszkozit\u00e1s\u00e1t, \u00e9s az emulzi\u00f3k stabilit\u00e1s\u00e1t nagyobb\u00e1 tehetik. Ezenk\u00edv\u00fcl a polimerek er\u0151s hat\u00e1rfel\u00fcleti filmet k\u00e9pezhetnek, ami stabilabb\u00e1 teszi az emulzi\u00f3s rendszert.<\/p>\n<p>Bizonyos esetekben a szil\u00e1rd por hozz\u00e1ad\u00e1sa stabiliz\u00e1lhatja az emulzi\u00f3t. A szil\u00e1rd por a v\u00edzben, az olajban vagy az interf\u00e9szben van, att\u00f3l f\u00fcgg\u0151en, hogy az olaj, a v\u00edz a szil\u00e1rd por nedves\u00edt\u0151 k\u00e9pess\u00e9g\u00e9r\u0151l, ha a szil\u00e1rd por teljesen nedvesedik v\u00edzzel, \u00e9s olajjal nedves\u00edthet\u0151, csak a v\u00edz-olaj hat\u00e1rfel\u00fcleten marad meg. A szil\u00e1rd por nem teszi az emulzi\u00f3t stabilv\u00e1, mert a hat\u00e1rfel\u00fcleten \u00f6sszegy\u0171jt\u00f6tt por fokozza a hat\u00e1rfel\u00fcleti filmet, amely hasonl\u00f3 a hat\u00e1rfel\u00fcleti adszorpci\u00f3s emulge\u00e1l\u00f3szer molekul\u00e1khoz, \u00edgy min\u00e9l szorosabban van elrendezve a szil\u00e1rd por a hat\u00e1rfel\u00fcleten, ann\u00e1l stabilabb az emulzi\u00f3.<\/p>\n<p>A fel\u00fcletakt\u00edv anyag k\u00e9pes jelent\u0151sen megn\u00f6velni az oldhatatlan vagy gyeng\u00e9n old\u00f3d\u00f3 szerves anyagok oldhat\u00f3s\u00e1g\u00e1t, miut\u00e1n micell\u00e1kat k\u00e9pez vizes oldatban, \u00e9s az oldat ekkor \u00e1tl\u00e1tsz\u00f3, \u00e9s a micell\u00e1knak ezt a hat\u00e1s\u00e1t szolubiliz\u00e1ci\u00f3nak nevezik. A szolubiliz\u00e1ci\u00f3t el\u0151id\u00e9zni k\u00e9pes fel\u00fcletakt\u00edv anyagot szolubiliz\u00e1tornak, a szolubiliz\u00e1lt szerves anyagot pedig szolubiliz\u00e1lt anyagnak nevezz\u00fck.<\/p>\n<h2>Ugyanazon sorozat term\u00e9kei<\/h2>\n<p><!-- lc-qa-start --><\/p>\n<p><strong>Quick answer:<\/strong> A practical additive decision starts with the exact defect: foam, poor wetting, craters, haze, or instability. The best product is usually the one that solves that defect with the safest compatibility window.<\/p>\n<p><!-- lc-qa-end --><\/p>\n<table style=\"border-collapse: collapse; width: 318.02pt;\" border=\"0\" width=\"424\" cellspacing=\"0\" cellpadding=\"0\">\n<tbody>\n<tr style=\"height: 13.50pt;\">\n<td class=\"et2\" style=\"height: 13.50pt; width: 87.00pt;\" width=\"116\" height=\"18\">Term\u00e9k neve<\/td>\n<td class=\"et2\" style=\"width: 129.75pt;\" width=\"173\">K\u00e9miai n\u00e9v<\/td>\n<td class=\"et2\" style=\"width: 101.25pt;\" width=\"135\">CAS-sz\u00e1m<\/td>\n<\/tr>\n<tr style=\"height: 13.50pt;\">\n<td class=\"et2\" style=\"height: 13.50pt;\" height=\"18\"> IPP<\/td>\n<td class=\"et2\"><a href=\"https:\/\/longchangchemical.com\/hu\/product\/isopropyl-palmitate-cas-142-91-6\/\"><span style=\"color: #00ccff;\">Izopropil-palmit\u00e1t<\/span><\/a><\/td>\n<td class=\"et2\">CAS 142-91-6<\/td>\n<\/tr>\n<tr style=\"height: 13.50pt;\">\n<td class=\"et2\" style=\"height: 13.50pt;\" height=\"18\"> IPL<\/td>\n<td class=\"et2\"><a href=\"https:\/\/longchangchemical.com\/hu\/product\/isopropyl-laurate-cas-10233-13-3\/\"><span style=\"color: #00ccff;\">Izopropil-laur\u00e1t<\/span><\/a><\/td>\n<td class=\"et2\">CAS 10233-13-3<\/td>\n<\/tr>\n<tr style=\"height: 13.50pt;\">\n<td class=\"et2\" style=\"height: 13.50pt;\" height=\"18\"> 2-EHP<\/td>\n<td class=\"et2\"><a href=\"https:\/\/longchangchemical.com\/hu\/product\/isooctyl-palmitate-cas-1341-38-4\/\"><span style=\"color: #00ccff;\">Izooktil-palmit\u00e1t<\/span><\/a><\/td>\n<td class=\"et2\">CAS 1341-38-4<\/td>\n<\/tr>\n<tr style=\"height: 13.50pt;\">\n<td class=\"et2\" style=\"height: 13.50pt;\" height=\"18\"> IPM<\/td>\n<td class=\"et2\"><a href=\"https:\/\/longchangchemical.com\/hu\/product\/isopropyl-myristate-cas-110-27-0\/\"><span style=\"color: #00ccff;\">Izopropil- miriszt\u00e1t<\/span><\/a><\/td>\n<td class=\"et2\">CAS 110-27-0<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2><\/h2>\n<p><!-- lc-commercial-start --><\/p>\n<h2>How buyers usually evaluate coating and ink additives<\/h2>\n<p>Additive selection is usually most effective when the team defines the defect first and then screens compatibility, dosage range, and process stage. That is often much more reliable than choosing only by chemistry family or by a single dramatic lab result.<\/p>\n<ul>\n<li><strong>Start from the defect, not the additive name:<\/strong> wetting loss, crater, microfoam, and instability often need different solutions even inside the same formula.<\/li>\n<li><strong>Check compatibility at the intended dosage:<\/strong> the strongest additive can still be the wrong commercial choice if it narrows the process window too much.<\/li>\n<li><strong>Review the stage of use:<\/strong> some products are most useful during grind, while others matter more during let-down, filling, or final application.<\/li>\n<li><strong>Balance cure or film quality with defect control:<\/strong> the right additive fixes the problem without sacrificing adhesion, gloss, or appearance.<\/li>\n<\/ul>\n<h3>Recommended product references<\/h3>\n<ul>\n<li><strong><a href=\"https:\/\/longchangchemical.com\/hu\/product\/chlumiaf-094\/\">CHLUMIAF 094<\/a>:<\/strong> A balanced defoamer reference for waterborne coatings and many general foam-control screens.<\/li>\n<li><strong><a href=\"https:\/\/longchangchemical.com\/hu\/product\/chlumiaf-3062\/\">CHLUMIAF 3062<\/a>:<\/strong> Useful when printing-ink and UV-ink compatibility matter in the defoaming screen.<\/li>\n<li><strong><a href=\"https:\/\/longchangchemical.com\/hu\/product\/chlumiaf-3037\/\">CHLUMIAF 3037<\/a>:<\/strong> A stronger process-defoaming option when persistent foam survives harsher conditions.<\/li>\n<li><strong><a href=\"https:\/\/longchangchemical.com\/hu\/product\/chlumiwe-3280\/\">CHLUMIWE 3280<\/a>:<\/strong> A strong wetting-agent reference for inks, coatings, and difficult substrate wetting.<\/li>\n<\/ul>\n<h3>FAQ for buyers and formulators<\/h3>\n<p><strong>Why does an additive that looks powerful in a beaker sometimes fail in production?<\/strong><br \/>Because shear, temperature, substrate, and the full formula can all change the way the additive performs under real process conditions.<\/p>\n<p><strong>Should the most aggressive additive always be preferred?<\/strong><br \/>Not usually. The best additive is the one that solves the real defect while preserving the broadest safe operating window.<\/p>\n<p><!-- lc-commercial-end --><\/p>\n<h2><strong><b>L\u00e9pjen kapcsolatba vel\u00fcnk most!<\/b><\/strong><\/h2>\n<h4><strong><b>Ha COA, MSDS vagy TDS-re van sz\u00fcks\u00e9ge, k\u00e9rj\u00fck, t\u00f6ltse ki el\u00e9rhet\u0151s\u00e9g\u00e9t az al\u00e1bbi \u0171rlapon, \u00e1ltal\u00e1ban 24 \u00f3r\u00e1n bel\u00fcl felvessz\u00fck \u00d6nnel a kapcsolatot. \u00d6n is k\u00fcldhet nekem e-mailt <span style=\"color: #0000ff;\"><a style=\"color: #0000ff;\" href=\"mailto:info@longchangchemical.com\">info@longchangchemical.com<\/a><\/span> munkaid\u0151ben ( 8:30-18:00 UTC+8 H.-Szombat ) vagy haszn\u00e1lja a weboldal \u00e9l\u0151 chatj\u00e9t, hogy azonnali v\u00e1laszt kapjon.<\/b><\/strong><\/h4>","protected":false},"excerpt":{"rendered":"<p>I. Several concepts about surfactants. The property that can reduce the surface tension of the solvent is called surface activity, and the substance with surface activity is called surface active<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[114],"tags":[],"class_list":["post-5427","post","type-post","status-publish","format-standard","hentry","category-catalysts-chemical-auxiliary-agents"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v25.3.1 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Basic theory of surfactants (I) - Longchang Chemical<\/title>\n<meta name=\"description\" content=\"I. Several concepts about surfactants. 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