{"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\/tr\/basic-theory-of-surfactants-i\/","title":{"rendered":"Y\u00fczey aktif maddelerin temel teorisi (I)"},"content":{"rendered":"<p>I. Y\u00fczey aktif maddeler hakk\u0131nda \u00e7e\u015fitli kavramlar.<\/p>\n<p>\u00c7\u00f6z\u00fcc\u00fcn\u00fcn y\u00fczey gerilimini azaltabilen \u00f6zelli\u011fe y\u00fczey aktivitesi, y\u00fczey aktivitesine sahip maddeye ise y\u00fczey aktif madde denir. Sulu \u00e7\u00f6zeltide molek\u00fclleri birle\u015ftirerek misel ve di\u011fer birle\u015fenleri olu\u015fturabilen, y\u00fczey aktivitesi y\u00fcksek, \u0131slatma, em\u00fclsifikasyon, k\u00f6p\u00fcrme ve y\u0131kama fonksiyonlar\u0131na da sahip olan y\u00fczey aktif maddeye y\u00fczey aktif madde denir. Bir s\u0131v\u0131n\u0131n y\u00fczeyindeki herhangi bir birim uzunluktaki b\u00fcz\u00fclme kuvvetine y\u00fczey gerilimi denir ve birimi N-m-1'dir.<\/p>\n<p>\u0130kinci olarak, y\u00fczey aktif maddelerin molek\u00fcler yap\u0131 \u00f6zellikleri.<\/p>\n<p>Y\u00fczey aktif maddeler, iki faz aras\u0131ndaki aray\u00fczey gerilimini veya bir s\u0131v\u0131n\u0131n (genellikle su) y\u00fczey gerilimini \u00f6nemli \u00f6l\u00e7\u00fcde de\u011fi\u015ftirebilen ve \u0131slatma, k\u00f6p\u00fcrme, em\u00fclsifikasyon ve y\u0131kama gibi \u00f6zelliklere sahip \u00f6zel yap\u0131 ve \u00f6zelliklere sahip organik bile\u015fiklerdir. Yap\u0131 bak\u0131m\u0131ndan, y\u00fczey aktif maddelerin hepsinin ortak \u00f6zelli\u011fi, molek\u00fcllerinin farkl\u0131 \u00f6zelliklere sahip iki grup i\u00e7ermesidir; bir u\u00e7, ya\u011fda \u00e7\u00f6z\u00fcnen ancak suda \u00e7\u00f6z\u00fcnmeyen, hidrofobik grup veya su itici grup olarak da bilinen uzun zincirli polar olmayan bir gruptur. Spektrumun di\u011fer ucunda ise suda \u00e7\u00f6z\u00fcnen gruplar, yani hidrofilik gruplar veya hidrofilik gruplar yer al\u0131r. Hidrofilik grup, t\u00fcm y\u00fczey aktif maddenin suda \u00e7\u00f6z\u00fcn\u00fcr olmas\u0131n\u0131 ve gerekli \u00e7\u00f6z\u00fcn\u00fcrl\u00fc\u011fe sahip olmas\u0131n\u0131 sa\u011flamak i\u00e7in yeterince hidrofilik olmal\u0131d\u0131r. Y\u00fczey aktif maddeler hem hidrofilik hem de hidrofobik gruplar i\u00e7erdi\u011finden, bu nedenle s\u0131v\u0131 fazlardan en az birinde \u00e7\u00f6z\u00fcn\u00fcrler. Hem hidrofilik hem de lipofilik olan y\u00fczey aktif maddelerin bu \u00f6zelli\u011fine amfifilik denir.<\/p>\n<p>Piyasada ayr\u0131ca \u00f6zel bir bifilik y\u00fczey aktif madde t\u00fcr\u00fc de bulunmaktad\u0131r; bunlardan kin\u00fcrenin glikol y\u00fczey aktif madde, temsili \u00fcr\u00fcnlerden biridir. Ortada simetrik ve nispeten \"sert\" bir fonksiyonel grup taraf\u0131ndan yap\u0131sal olarak ba\u011flanm\u0131\u015f iki \u00e7ift hidrofobik ve hidrofilik gruba sahiptir. Baryonik y\u00fczey aktif maddeler daha az kararl\u0131 k\u00f6p\u00fckt\u00fcr ve spesifik ola\u011fan\u00fcst\u00fc dinamik \u0131slanabilirli\u011fe sahiptir.<\/p>\n<p>Y\u00fczey aktif madde t\u00fcrleri.<\/p>\n<p>S\u00fcrfaktan, hem hidrofobik hem de hidrofilik gruplara sahip amfifilik bir molek\u00fcld\u00fcr. Y\u00fczey aktif maddelerin hidrofobik gruplar\u0131 genellikle d\u00fcz zincirli alkil C8 ila C20, dall\u0131 zincirli alkil C8 ila C20, alkilbenzen gruplar\u0131 (alkil karbon atomu say\u0131s\u0131 8 ila 16) vb. gibi uzun hidrokarbon zincirlerinden olu\u015fur. Hidrofobik gruplar\u0131n fark\u0131, esas olarak daha k\u00fc\u00e7\u00fck olan hidrokarbon zincirlerinin yap\u0131sal de\u011fi\u015fikliklerinde iken, hidrofilik gruplar\u0131n \u00e7e\u015fitlili\u011fi daha b\u00fcy\u00fckt\u00fcr. Bu nedenle, y\u00fczey aktif maddelerin \u00f6zellikleri, hidrofobik gruplar\u0131n boyutu ve \u015fekline ek olarak esas olarak hidrofilik gruplarla ilgilidir. Hidrofilik gruplar\u0131n yap\u0131s\u0131 hidrofobik gruplar\u0131nkinden daha fazla de\u011fi\u015fiklik g\u00f6sterir, bu nedenle y\u00fczey aktif maddelerin s\u0131n\u0131fland\u0131r\u0131lmas\u0131 genellikle hidrofilik gruplar\u0131n yap\u0131s\u0131na dayan\u0131r. Bu s\u0131n\u0131fland\u0131rma, hidrofilik grubun iyonik olup olmamas\u0131na dayan\u0131r ve anyonik, katyonik, noniyonik, amfoterik ve di\u011fer \u00f6zel y\u00fczey aktif madde t\u00fcrlerine ayr\u0131l\u0131r.<\/p>\n<p>IV. Y\u00fczey aktif madde sulu \u00e7\u00f6zeltisinin \u00f6zellikleri.<\/p>\n<p>1. Aray\u00fczeyde y\u00fczey aktif madde adsorpsiyonu. S\u00fcrfaktan molek\u00fclleri, amfifilik molek\u00fcller olan lipofilik ve hidrofilik gruplara sahiptir. Su g\u00fc\u00e7l\u00fc polar bir s\u0131v\u0131d\u0131r ve y\u00fczey aktif madde suda \u00e7\u00f6z\u00fcnd\u00fc\u011f\u00fcnde, hidrofilik grubu polarite benzerli\u011fi ve itme prensibine g\u00f6re suya \u00e7ekilir ve suda \u00e7\u00f6z\u00fcl\u00fcr ve lipofilik grubu sudan itilir ve suyu terk eder, sonu\u00e7 olarak y\u00fczey aktif madde molek\u00fclleri (veya iyonlar\u0131) iki faz\u0131n aray\u00fcz\u00fcnde adsorbe edilir, b\u00f6ylece iki faz aras\u0131ndaki ara y\u00fczey gerilimi azal\u0131r. Aray\u00fczeyde ne kadar \u00e7ok y\u00fczey aktif madde molek\u00fcl\u00fc (veya iyonu) adsorbe edilirse, aray\u00fczey gerilimindeki azalma o kadar b\u00fcy\u00fck olur.<\/p>\n<p>2. Adsorpsiyon membran\u0131n\u0131n baz\u0131 \u00f6zellikleri.<\/p>\n<p>Adsorpsiyon filminin y\u00fczey bas\u0131nc\u0131: y\u00fczey aktif madde, adsorpsiyon filmini \u00e7\u00f6zelti y\u00fczeyi boyunca itmek i\u00e7in aray\u00fcze s\u00fcrt\u00fcnmesiz hareketli bir \u015famand\u0131ra yerle\u015ftirmek gibi bir adsorpsiyon filmi olu\u015fturmak i\u00e7in gaz-s\u0131v\u0131 aray\u00fcz\u00fcnde adsorbe edilir, film \u015famand\u0131ra \u00fczerinde bir bas\u0131n\u00e7 olu\u015fturur ve bu bas\u0131nca y\u00fczey bas\u0131nc\u0131 denir.<\/p>\n<p>Y\u00fczey viskozitesi: y\u00fczey bas\u0131nc\u0131 ile ayn\u0131 olan y\u00fczey viskozitesi, \u00e7\u00f6z\u00fcnmeyen molek\u00fcler film taraf\u0131ndan sergilenen bir \u00f6zelliktir. \u0130nce bir metal tel platin halkan\u0131n s\u00fcspansiyonu, b\u00f6ylece d\u00fczlemi tank\u0131n su y\u00fczeyi ile temas eder, platin halkay\u0131 d\u00f6nd\u00fcr\u00fcr, platin halka su t\u0131kan\u0131kl\u0131\u011f\u0131n\u0131n viskozitesi ile, genlik yava\u015f yava\u015f bozulur, buna g\u00f6re y\u00fczey viskozitesi \u00f6l\u00e7\u00fclebilir, y\u00f6ntem: \u00f6nce saf su y\u00fczeyi deneylerinde, \u00f6l\u00e7\u00fclen genlik bozulmas\u0131 ve daha sonra y\u00fczey filminin viskozitesini bulmak i\u00e7in ikisi aras\u0131ndaki farktan y\u00fczey filmi bozulmas\u0131 olu\u015fumunu \u00f6l\u00e7t\u00fc. Y\u00fczey viskozitesi, adsorpsiyon filminin y\u00fczey bas\u0131nc\u0131 ve viskozitesine sahip olmas\u0131 nedeniyle y\u00fczey filminin kat\u0131l\u0131\u011f\u0131 ile yak\u0131ndan ilgilidir, elastikiyete sahip olmal\u0131d\u0131r. Adsorplanan filmin y\u00fczey bas\u0131nc\u0131 ve viskozitesi ne kadar y\u00fcksekse, elastik mod\u00fcl\u00fc de o kadar y\u00fcksek olur. Y\u00fczey adsorpsiyon filminin elastik mod\u00fcl\u00fc, kabarc\u0131\u011f\u0131 stabilize etme s\u00fcrecinde \u00f6nemli bir \u00f6neme sahiptir.<\/p>\n<p>3\u3001Misellerin olu\u015fumu.<\/p>\n<p>Seyreltik y\u00fczey aktif madde \u00e7\u00f6zeltisi, ideal \u00e7\u00f6zeltinin izledi\u011fi yasaya uyar. \u00c7\u00f6zeltinin y\u00fczeyine adsorbe edilen y\u00fczey aktif madde miktar\u0131, \u00e7\u00f6zeltinin konsantrasyonu ile artar ve konsantrasyon belirli bir de\u011fere ula\u015ft\u0131\u011f\u0131nda veya a\u015ft\u0131\u011f\u0131nda, adsorpsiyon miktar\u0131 art\u0131k artmaz. Bu fazla y\u00fczey aktif madde molek\u00fclleri \u00e7\u00f6zeltide d\u00fczensizdir veya d\u00fczenli bir \u015fekilde bulunurlar. Hem pratik hem de teori, \u00e7\u00f6zelti i\u00e7inde misel olarak adland\u0131r\u0131lan birlikler olu\u015fturduklar\u0131n\u0131 g\u00f6stermektedir. Miselleri olu\u015fturmak i\u00e7in \u00e7\u00f6zeltideki minimum y\u00fczey aktif madde konsantrasyonuna kritik misel konsantrasyonu (CMC) denir.<\/p>\n<p>&nbsp;<\/p>\n<p>HLB, y\u00fczey aktif maddenin hidrofilik ve lipofilik gruplar\u0131n\u0131n hidrofilik ve lipofilik dengesini, yani y\u00fczey aktif maddenin HLB de\u011ferini g\u00f6steren hidrofil lipofil dengesinin k\u0131saltmas\u0131d\u0131r. b\u00fcy\u00fck bir HLB de\u011feri, g\u00fc\u00e7l\u00fc bir hidrofilik molek\u00fcl\u00fc ve zay\u0131f bir lipofilik molek\u00fcl\u00fc g\u00f6sterir; tersine, g\u00fc\u00e7l\u00fc bir lipofilik molek\u00fcl ve zay\u0131f bir hidrofilik molek\u00fcl. HLB de\u011feri g\u00f6receli bir de\u011ferdir, bu nedenle HLB de\u011feri ayarland\u0131\u011f\u0131nda, hidrofilik \u00f6zelli\u011fi olmayan parafin mumunun HLB de\u011feri 0 olarak ayarlan\u0131rken, daha fazla suda \u00e7\u00f6z\u00fcn\u00fcr olan sodyum dodesil s\u00fclfat\u0131n HLB de\u011feri 40 olarak ayarlan\u0131r. Genel olarak, HLB de\u011feri 10'dan k\u00fc\u00e7\u00fck olan em\u00fclgat\u00f6rler lipofilik, 10'dan b\u00fcy\u00fck olanlar ise hidrofiliktir. Bu nedenle, lipofilikten hidrofilli\u011fe ge\u00e7i\u015f noktas\u0131 yakla\u015f\u0131k 10'dur.<\/p>\n<p>&nbsp;<\/p>\n<p>Y\u00fczey aktif maddenin HLB de\u011ferine g\u00f6re, olas\u0131 kullan\u0131mlar kabaca anla\u015f\u0131labilir, soldaki tabloda g\u00f6sterildi\u011fi gibi, ya\u011f i\u00e7inde su em\u00fclgat\u00f6r\u00fc olarak kullan\u0131ma uygun y\u00fczey aktif maddenin HLB de\u011feri 3,5 ila 6 iken, ya\u011f i\u00e7inde su em\u00fclgat\u00f6r\u00fcn\u00fcn HLB de\u011feri 8 ila 18'dir.<\/p>\n<p>&nbsp;<\/p>\n<p>Be\u015finci olarak, em\u00fclsifikasyon ve \u00e7\u00f6z\u00fcn\u00fcrle\u015ftirmenin rol\u00fc.<\/p>\n<p>Kar\u015f\u0131l\u0131kl\u0131 olarak \u00e7\u00f6z\u00fcnmeyen iki s\u0131v\u0131, biri di\u011ferinde da\u011f\u0131lm\u0131\u015f par\u00e7ac\u0131klar (damlac\u0131klar veya s\u0131v\u0131 kristaller) ile em\u00fclsiyon ad\u0131 verilen bir sistem olu\u015fturur. \u0130ki s\u0131v\u0131n\u0131n s\u0131n\u0131r alan\u0131ndaki art\u0131\u015f nedeniyle em\u00fclsiyon olu\u015fumu, bu nedenle bu sistem termodinamik olarak karars\u0131zd\u0131r, em\u00fclsiyonu kararl\u0131 hale getirmek i\u00e7in \u00fc\u00e7\u00fcnc\u00fc bir bile\u015fen eklemek gerekir - sistemin aray\u00fczey enerjisini azaltmak i\u00e7in em\u00fclgat\u00f6r. Em\u00fclgat\u00f6r y\u00fczey aktif maddeye aittir, ana i\u015flevi em\u00fclsiyon rol\u00fcn\u00fc oynamakt\u0131r. Bu faz\u0131n damlac\u0131klar\u0131n\u0131n varl\u0131\u011f\u0131nda em\u00fclsiyon, dispersiyon ortam\u0131 (veya d\u0131\u015f faz \ufe51 s\u00fcrekli faz) olarak adland\u0131r\u0131lan ba\u015fka bir faza ba\u011fl\u0131 da\u011f\u0131lm\u0131\u015f faz (veya i\u00e7 faz \ufe51 s\u00fcreksiz faz) olarak adland\u0131r\u0131l\u0131r.<\/p>\n<p>1, em\u00fclgat\u00f6rler ve em\u00fclsiyonlar. Yayg\u0131n em\u00fclsiyon, bir faz su veya sulu \u00e7\u00f6zeltidir, di\u011fer faz gres, balmumu vb. gibi su ile kar\u0131\u015fmayan organik maddelerdir. Olu\u015fan su ve ya\u011f em\u00fclsiyonlar\u0131, da\u011f\u0131l\u0131m\u0131na g\u00f6re iki t\u00fcre ayr\u0131labilir: su i\u00e7inde ya\u011f em\u00fclsiyonu olu\u015fturmak i\u00e7in su i\u00e7inde da\u011f\u0131lm\u0131\u015f ya\u011f, O \/ W (ya\u011f \/ su): su i\u00e7inde ya\u011f em\u00fclsiyonu olu\u015fturmak i\u00e7in ya\u011f i\u00e7inde da\u011f\u0131lm\u0131\u015f su, W \/ O (su \/ ya\u011f) dedi. Karma\u015f\u0131k ya\u011f i\u00e7inde su W\/O\/W tipi ve ya\u011f i\u00e7inde su O\/W\/O tipi \u00e7oklu em\u00fclsiyonlar da olu\u015fturulabilir.<\/p>\n<p>Em\u00fclgat\u00f6rler, aray\u00fczey gerilimini azaltarak ve tek molek\u00fcll\u00fc aray\u00fczey filmleri olu\u015fturarak em\u00fclsiyonlar\u0131 stabilize etmek i\u00e7in kullan\u0131l\u0131r. Em\u00fclgat\u00f6r gereksinimlerinin em\u00fclsifikasyonunda: a, em\u00fclgat\u00f6r iki faz aras\u0131ndaki aray\u00fcz\u00fc adsorbe edebilmeli veya zenginle\u015ftirebilmelidir, b\u00f6ylece aray\u00fczey gerilimi azal\u0131r; b, em\u00fclgat\u00f6r partik\u00fcllere y\u00fck vermelidir, b\u00f6ylece partik\u00fcller aras\u0131nda elektrostatik itme veya \u00f6zellikle y\u00fcksek bir koruyucu filmin partik\u00fclleri etraf\u0131nda kararl\u0131 bir \ufe51 viskozite olu\u015fumu. Bu nedenle, em\u00fclsiyonla\u015ft\u0131r\u0131c\u0131 olarak kullan\u0131lan maddenin em\u00fclsifiye olabilmesi i\u00e7in amfifilik gruplara sahip olmas\u0131 gerekir ve y\u00fczey aktif maddeler bu gereksinimi kar\u015f\u0131layabilir.<\/p>\n<p>2, em\u00fclsiyon haz\u0131rlama y\u00f6ntemleri ve em\u00fclsiyonlar\u0131n stabilitesini etkileyen fakt\u00f6rler.<\/p>\n<p>Em\u00fclsiyon haz\u0131rlaman\u0131n iki y\u00f6ntemi vard\u0131r: biri, s\u0131v\u0131y\u0131 ba\u015fka bir s\u0131v\u0131 i\u00e7inde k\u00fc\u00e7\u00fck par\u00e7ac\u0131klar halinde da\u011f\u0131tmak i\u00e7in mekanik y\u00f6ntemi kullanmakt\u0131r, bu \u00e7o\u011funlukla end\u00fcstride em\u00fclsiyon haz\u0131rlamak i\u00e7in kullan\u0131l\u0131r; di\u011feri ise s\u0131v\u0131y\u0131 molek\u00fcler bir halde ba\u015fka bir s\u0131v\u0131 i\u00e7inde \u00e7\u00f6zmek ve ard\u0131ndan bir em\u00fclsiyon olu\u015fturmak i\u00e7in uygun \u015fekilde toplanmas\u0131n\u0131 sa\u011flamakt\u0131r.<\/p>\n<p>Bir em\u00fclsiyonun kararl\u0131l\u0131\u011f\u0131, faz ayr\u0131\u015fmas\u0131na yol a\u00e7acak partik\u00fcl k\u00fcmelenmesine direnme kabiliyetidir. Em\u00fclsiyonlar b\u00fcy\u00fck serbest enerjilere sahip termodinamik olarak karars\u0131z sistemlerdir. Bu nedenle bir em\u00fclsiyonun s\u00f6zde kararl\u0131l\u0131\u011f\u0131 asl\u0131nda sistemin bir denge durumuna ula\u015fmas\u0131 i\u00e7in ge\u00e7en s\u00fcredir, yani sistemdeki s\u0131v\u0131lardan birinin ayr\u0131lmas\u0131 i\u00e7in ge\u00e7en s\u00fcredir. Aray\u00fczey membran\u0131nda ya\u011f alkolleri, ya\u011f asitleri ve ya\u011f aminleri gibi polar organik molek\u00fcller bulundu\u011funda, membran g\u00fcc\u00fc \u00f6nemli \u00f6l\u00e7\u00fcde artar. Bunun nedeni, em\u00fclgat\u00f6r molek\u00fclleri ile alkoller, asitler ve aminler ve di\u011fer polar molek\u00fcllerin aray\u00fczey adsorpsiyon tabakas\u0131nda bir \"kompleks\" olu\u015fturmas\u0131 ve b\u00f6ylece aray\u00fczey membran g\u00fcc\u00fcn\u00fcn artmas\u0131d\u0131r.<\/p>\n<p>\u0130kiden fazla \u00e7e\u015fit y\u00fczey aktif maddeden olu\u015fan em\u00fclgat\u00f6rlere kar\u0131\u015f\u0131k em\u00fclgat\u00f6r denir. Kar\u0131\u015f\u0131k em\u00fclgat\u00f6r su\/ya\u011f aray\u00fcz\u00fcnde adsorbe olur, molek\u00fcller aras\u0131 etki kompleksler olu\u015fturabilir. G\u00fc\u00e7l\u00fc molek\u00fcller aras\u0131 etki nedeniyle, aray\u00fczey gerilimi \u00f6nemli \u00f6l\u00e7\u00fcde azal\u0131r, aray\u00fczeyde adsorbe edilen em\u00fclgat\u00f6r miktar\u0131 \u00f6nemli \u00f6l\u00e7\u00fcde artar, aray\u00fczey film yo\u011funlu\u011funun olu\u015fumu artar, mukavemet artar.<\/p>\n<p>S\u0131v\u0131 taneciklerin y\u00fck\u00fc em\u00fclsiyonun kararl\u0131l\u0131\u011f\u0131 \u00fczerinde \u00f6nemli bir etkiye sahiptir. Kararl\u0131 em\u00fclsiyonlarda s\u0131v\u0131 tanecikler genellikle y\u00fckl\u00fcd\u00fcr. \u0130yonik em\u00fclgat\u00f6r kullan\u0131ld\u0131\u011f\u0131nda, em\u00fclgat\u00f6r iyonunun aray\u00fcz\u00fcnde adsorbe edilen lipofilik grubu ya\u011f faz\u0131na, hidrofilik grubu su faz\u0131na yerle\u015ftirilir, b\u00f6ylece s\u0131v\u0131 boncuklar y\u00fckl\u00fc hale gelir. Ayn\u0131 y\u00fcke sahip s\u0131v\u0131 boncuklar\u0131n em\u00fclsiyonu olarak, birbirlerini iterler, topaklanmalar\u0131 kolay de\u011fildir, b\u00f6ylece stabilite artar. Boncuklar \u00fczerinde adsorbe edilen em\u00fclgat\u00f6r iyonlar\u0131 ne kadar fazla olursa, y\u00fck o kadar fazla olur, boncuklar\u0131n topaklanmas\u0131n\u0131 \u00f6nleme yetene\u011fi o kadar fazla olur, em\u00fclsiyon sistemi o kadar kararl\u0131 olur.<\/p>\n<p>Em\u00fclsiyon dispersiyon ortam\u0131n\u0131n viskozitesinin em\u00fclsiyonun stabilitesi \u00fczerinde belirli bir etkisi vard\u0131r. Genel olarak, dispersiyon ortam\u0131n\u0131n viskozitesi ne kadar y\u00fcksekse, em\u00fclsiyonun stabilitesi de o kadar y\u00fcksek olur. Bunun nedeni, dispersiyon ortam\u0131n\u0131n viskozitesinin b\u00fcy\u00fck olmas\u0131d\u0131r, bu da s\u0131v\u0131 taneciklerin Brown hareketi \u00fczerinde g\u00fc\u00e7l\u00fc bir etkiye sahiptir ve s\u0131v\u0131 tanecikler aras\u0131ndaki \u00e7arp\u0131\u015fmay\u0131 yava\u015flat\u0131r, b\u00f6ylece sistem kararl\u0131 kal\u0131r. Genellikle em\u00fclsiyonlarda \u00e7\u00f6z\u00fcnebilen polimer maddeler sistemin viskozitesini art\u0131rabilir ve em\u00fclsiyonlar\u0131n stabilitesini daha y\u00fcksek hale getirebilir. Ayr\u0131ca polimerler g\u00fc\u00e7l\u00fc bir aray\u00fczey filmi olu\u015fturarak em\u00fclsiyon sistemini daha kararl\u0131 hale getirebilir.<\/p>\n<p>Baz\u0131 durumlarda, kat\u0131 toz ilavesi de em\u00fclsiyonu stabilize edebilir. Kat\u0131 toz su, ya\u011f veya aray\u00fczeyde, ya\u011fa ba\u011fl\u0131 olarak, kat\u0131 tozun \u0131slatma kabiliyeti \u00fczerine su, kat\u0131 toz tamamen su ile \u0131slat\u0131l\u0131rsa ve ya\u011f ile \u0131slat\u0131labilirse, sadece su-ya\u011f aray\u00fcz\u00fcnde tutulacakt\u0131r. Kat\u0131 toz em\u00fclsiyonu kararl\u0131 hale getirmez \u00e7\u00fcnk\u00fc aray\u00fczde toplanan toz, aray\u00fcz adsorpsiyon em\u00fclgat\u00f6r molek\u00fcllerine benzer aray\u00fcz filmini geli\u015ftirir, bu nedenle kat\u0131 toz aray\u00fczde ne kadar yak\u0131n d\u00fczenlenirse em\u00fclsiyon o kadar kararl\u0131 olur.<\/p>\n<p>Y\u00fczey aktif madde, sulu \u00e7\u00f6zeltide miseller olu\u015fturduktan sonra \u00e7\u00f6z\u00fcnmeyen veya az \u00e7\u00f6z\u00fcnen organik maddelerin \u00e7\u00f6z\u00fcn\u00fcrl\u00fc\u011f\u00fcn\u00fc \u00f6nemli \u00f6l\u00e7\u00fcde art\u0131rma yetene\u011fine sahiptir ve \u00e7\u00f6zelti bu s\u0131rada \u015feffaft\u0131r ve misellerin bu etkisine \u00e7\u00f6z\u00fcn\u00fcrle\u015ftirme denir. \u00c7\u00f6z\u00fcn\u00fcrle\u015ftirme \u00fcretebilen y\u00fczey aktif maddeye \u00e7\u00f6z\u00fcn\u00fcrle\u015ftirici, \u00e7\u00f6z\u00fcn\u00fcrle\u015ftirilen organik maddeye ise \u00e7\u00f6z\u00fcn\u00fcrle\u015ftirilmi\u015f madde denir.<\/p>\n<h2>Ayn\u0131 seri \u00fcr\u00fcnler<\/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\">\u00dcr\u00fcn Ad\u0131<\/td>\n<td class=\"et2\" style=\"width: 129.75pt;\" width=\"173\">Kimyasal Ad\u0131<\/td>\n<td class=\"et2\" style=\"width: 101.25pt;\" width=\"135\">CAS numaras\u0131<\/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\/tr\/product\/isopropyl-palmitate-cas-142-91-6\/\"><span style=\"color: #00ccff;\">\u0130zopropil palmitat<\/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\/tr\/product\/isopropyl-laurate-cas-10233-13-3\/\"><span style=\"color: #00ccff;\">\u0130zopropil Laurat<\/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\/tr\/product\/isooctyl-palmitate-cas-1341-38-4\/\"><span style=\"color: #00ccff;\">\u0130zooktil palmitat<\/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\/tr\/product\/isopropyl-myristate-cas-110-27-0\/\"><span style=\"color: #00ccff;\">\u0130zopropil miristat<\/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\/tr\/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\/tr\/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\/tr\/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\/tr\/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>\u015eimdi Bize Ula\u015f\u0131n!<\/b><\/strong><\/h2>\n<h4><strong><b>COA, MSDS veya TDS'ye ihtiyac\u0131n\u0131z varsa, l\u00fctfen a\u015fa\u011f\u0131daki forma ileti\u015fim bilgilerinizi girin, genellikle 24 saat i\u00e7inde sizinle ileti\u015fime ge\u00e7ece\u011fiz. Bana e-posta da g\u00f6nderebilirsiniz <span style=\"color: #0000ff;\"><a style=\"color: #0000ff;\" href=\"mailto:info@longchangchemical.com\">info@longchangchemical.com<\/a><\/span> \u00c7al\u0131\u015fma saatleri i\u00e7inde (8:30 - 6:00 UTC+8 Pzt.~Sat.) veya h\u0131zl\u0131 yan\u0131t almak i\u00e7in web sitesi canl\u0131 sohbetini kullan\u0131n.<\/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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Several concepts about surfactants. 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