Shirye-shiryen emulsion na kwaskwarima

Solubilization na kwatankwacin ƙananan adadin abubuwan haɗin mai a cikin kurkura da tsarin shamfu yana nuna ainihin abubuwan haɓakawa waɗanda ya kamata a sa ran alkyl polyglycosides su nuna azaman surfactants na nonionic. Duk da haka, fahimtar fahimtar halin lokaci a cikin tsarin multicomponent ya zama dole don kimanta alkyl polyglycosides a matsayin emulsifiers masu ƙarfi a hade tare da masu dacewa da coemulsifiers na hydrophobic. Gaba ɗaya, aikin interfacial na alkyl polyglycosides an ƙaddara ta tsawon sarkar carbon kuma, zuwa ƙarami, ta hanyar digiri na polymerization (DP). Ayyukan tsaka-tsaki yana ƙaruwa tare da tsayin sarkar alkyl kuma yana kan mafi girma kusa ko sama da CMC tare da ƙimar ƙasa 1 mN/m. A cikin ruwa / ma'adinai na man fetur, C12-14 APG yana nuna ƙananan tashin hankali fiye da C12-14 alkyl sulfate lnterfacial tashin hankali na n-decane, isopropyl myristate da 2-octyl dodecanol an auna don tsarki alkyl monoglucosides (C8, C10, C12) da kuma sulubility na man fetur ya dogara a kan polyglycosides. aka bayyana. Za a iya amfani da matsakaicin sarkar alkyl polyglycosides azaman emulsifiers don o/w emulsion a haɗe tare da masu samar da hydrophobic co emulsifiers.

Alkyl polyglycosides sun bambanta da ethoxylated nonionic surfactants a cikin cewa ba su jurewa yanayin canjin yanayin zafi daga mai-in-ruwa (O / W) zuwa mai-in-ruwa (W / O) emulsions. Maimakon haka, abubuwan hydrophilic / lipophilic za a iya daidaita su ta hanyar haɗuwa tare da emulsifier hydrophobic irin su glycated glycated (Glyced) mono-laurate (SML) .A gaskiya ma, halin lokaci da tashin hankali na alkyl polyglycoside emulsifier tsarin suna da kama da na al'ada m barasa ethoxylates tsarin idan hadawa rabo na hydrophilic / lipophilic emulsifier a cikin wadanda ba ethoxylated tsarin da ake amfani maimakon zafin jiki a matsayin key lokaci hali siga.

Tsarin don dodecane, ruwa, Lauryl Glucoside da Sorbitan Laurate a matsayin coemulsifier hydrophobic yana samar da microemulsions a wani adadin hadawa na C12-14 APG zuwa SML na 4: 6 zuwa 6: 4 (Hoto 1). Abubuwan da ke cikin SML mafi girma suna haifar da w/o emulsion yayin da mafi girman abun ciki na alkyl polyglycoside yana haifar da o/w emulsions. Bambance-bambancen jimlar ƙaddamarwar emulsifier a cikin abin da ake kira "Kifin Kahlweit" a cikin zane-zane na lokaci, jikin da ke dauke da microemulsions guda uku da wutsiya guda ɗaya, kamar yadda aka lura tare da emulsifiers ethoxylated a matsayin aiki na zafin jiki. Babban ikon emulsifying na C12-14 APG / SML tsarin gaskiya wanda aka kwatanta da barasa da aka kwatanta da barasa. 10 % na cakuda emulsifier ya isa ya samar da microemulsion mai lokaci-lokaci.

The kamance na lokaci inversion alamu na biyu surfactant iri ba kawai iyakance ga lokaci hali, amma kuma za a iya samu a cikin dubawa tashin hankali na emulsifying tsarin.The hydrophilic - lipophilic Properties na emulsifier cakuda kai ma'auni lokacin da Ratio na C12-14 APG / SML ya 4: 6, da kuma interfacial tashin hankali ya kasance mafi ƙasƙanci. Musamman, ƙaramin ƙaramar tashin hankali tsakanin fuska (kimanin 10^-3mN/m) an lura da shi ta amfani da cakuda C12-14 APG/SML.

Daga cikin alkyl glycosides dauke da microemulsions, dalilin da babban aikin interfacial shi ne cewa hydrophilic alkyl glycosides tare da manyan glucoside-head kungiyoyin da hydrophobic co-emulsifiers tare da kananan kungiyoyin suna gauraye a man-ruwa dubawa a cikin wani manufa rabo. Ruwan ruwa (da ingantaccen girman kai na hydration) bai dogara da zafin jiki ba fiye da yanayin da ke tattare da surfactants nonionic ethoxylated. Don haka, ana lura da tashin hankali na tsaka-tsaki na tsaka-tsaki ne kawai don ɗan ɗanɗanon yanayin dogaro da zafin jiki na cakuda emulsifier maras ethoxylated.

Wannan yana ba da aikace-aikace masu ban sha'awa saboda, ba kamar ethoxylates barasa mai kitse ba, alkyl glycosides na iya samar da microemulsions masu tsayayyen zafin jiki. Ta hanyar bambanta abun ciki na surfactant, nau'in surfactant da aka yi amfani da shi, da man fetur / ruwa, ana iya samar da microemulsions tare da ƙayyadaddun kaddarorin, irin su nuna gaskiya, danko, gyare-gyaren sakamako, da kaddarorin kumfa. Co-emulsifier a cikin tsarin gauraye na alkyl ether sulphate da wadanda ba ion ba, ana lura da yankin microemulsion da aka fadada, kuma za'a iya amfani da shi don tsara abubuwan da ke tattare da mai-ruwa mai kyau.

An yi wani kimantawa na pseudoternary lokaci triangles na multicomponent tsarin dauke da alkyl polyglycoside / SLES da SML tare da wani hydrocarbon (Dioctyl Cyclohexane) da kuma alkyl polyglycoside / SLES da GMO tare da iyakacin duniya mai (Dicaprylyl Ether / Octyl Dodecanol), da kuma iyakar w / octyl Dodecanol, da kuma iya nuna girman w / octyl Dodecanol. na matakai hexagonal da na lamellar matakan dogaro da tsarin sinadarai da rabon abubuwan da aka haɗa. Idan waɗannan matakan triangles na lokaci suna superimposed akan triangles masu dacewa tare da nuna misali halayen kumfa da kaddarorin danko na gaurayawan daidaitattun, suna ba da taimako mai mahimmanci ga mai tsarawa don gano takamaiman ƙirar microemulsion na musamman da aka tsara don misali tsabtace fuska ko wankan kumfa. A matsayin misali, za'a iya samun tsari na microemulsion mai dacewa don sake faɗuwar baho mai kumfa daga madaidaicin alwatika.