Physicochemical Properties ea Alkyl Polyglycosides-Phase boitšoaro

Mekhoa ea binary

Setšoantšo sa mohato oa C12-14 alkyl polyglycoside (C12-14 APG) / tsamaiso ea metsi e fapane le ea APG e khutšoanyane ea ketane. (Setšoantšo sa 3). Lithempereichara tse tlase, sebaka se tiileng / sa metsi se ka tlas'a sebaka sa Krafft se thehoa, se holim'a mefuta e mengata ea mahloriso. Ka ho eketseha ha mocheso, tsamaiso e fetoha karolo ea mokelikeli oa isotropic. Hobane kristale e fokotsehile ka mokhoa o itseng, moeli oa mohato ona o fetola boemo ka nako ea polokelo. Maemong a tlase, karolo ea mokelikeli oa isotropic e fetoha kaholimo ho 35 ℃ ho ea sebakeng sa mekhahlelo e 'meli ea mekhahlelo e' meli ea mokelikeli, joalo ka ha ho bonoa ka li-nonionic surfactants. Libakeng tse ka holimo ho 60% ka boima ba 'mele, tatellano ea karolo ea kristale ea metsi e thehoa ka mocheso oohle. Ke habohlokoa ho bolela hore sebakeng sa isotropic single phase, ho hlakile hore phallo ea birefringence e ka bonoa ha mahloriso a le tlaase ho feta mohato o qhibilihisitsoeng, ebe o nyamela ka potlako ka mor'a hore mokhoa oa ho kuta o phethoe. Leha ho le joalo, ha ho sebaka sa polyphase se fumanoeng se arohane le karolo ea L1. Mokhahlelong oa L1, sebaka se seng se nang le phallo e fokolang ea birefringence se haufi le boleng ba bonyane ba lekhalo la mokelikeli / mokelikeli o fapaneng.
Lipatlisiso tsa phenomenological mabapi le sebopeho sa mekhahlelo ea kristale ea metsi li entsoe ke Platz et al. Ho sebelisa mekhoa e kang polarization microscopy. Ka mor'a lipatlisiso tsena, libaka tse tharo tse fapaneng tsa lamellar li nkoa e le litharollo tse tebileng tsa C12-14 APG: Lα_{l ,}Laa_lhle Lah. Ho na le libopeho tse tharo tse fapaneng ho latela polarization microscopy.
Ka mor'a ho bolokoa nako e telele, karolo e tloaelehileng ea lamellar liquid crystalline e hlahisa libaka tse lefifi tsa pseudoisotropic tlas'a leseli la polarized. Libaka tsena li arohane ka ho hlaka ho tloha libakeng tse nang le mahlakore a mabeli. Lekhalo la Lαh, le hlahang sebakeng sa mahloriso a mahareng a sebaka sa mokelikeli oa kristale, ka mocheso o batlang o le holimo, o bonts'a masela a joalo. Lits'oants'o tsa Schlieren ha li hlokomeloe, leha ho na le li-streaks tse mafura tse nang le mafura a mangata hangata. Haeba sampole e nang le karolo ea Lαh e pholisitsoe ho fumana sebaka sa Krafft, sebopeho se fetoha ka tlase ho mocheso o ikhethang. Libaka tsa pseudoisotropic le li-streaks tse hlalositsoeng ka ho hlaka tsa oli lia nyamela. Qalong, ha ho na C12-14 APG e khanyang, ho e-na le hoo, karolo e ncha ea lyotropic e bontšang feela birefringence e fokolang e thehoa. Libakeng tse batlang li phahame, mohato ona o atoloha ho fihlela mocheso o phahameng. Tabeng ea alkyl glycosides, boemo bo fapaneng bo hlaha. Li-electrolyte tsohle, ntle le sodium hydroxide, li ile tsa fella ka ho fokotseha ho hoholo ha lintlha tsa maru. .Hoa makatsa hore ebe ho na le phapang e fokolang feela pakeng tsa li-electrolyte ka bomong. Ho eketsoa ha alkali ho fokolitse haholo maru. Ho hlalosa phapang ea boitšoaro pakeng tsa alkyl polyglycol ethers le alkyl polyglycol ethers, ho nahanoa hore sehlopha sa OH se bokelletsoeng karolong ea glucose se bile le mefuta e sa tšoaneng ea hydration le sehlopha sa ethylene oxide. Phello e kholo haholo ea li-electrolyte ho li-ether tsa Alkyl polyglycol e fana ka maikutlo a hore ho na le tefiso holim'a li-alkyl polyglycoside micelles, ha li-alkyl polyethylene glycol ethers li nka hore ha li lefelloe.
Kahoo, alkyl polyglycosides e itšoara joalo ka motsoako oa li-alkyl polyglycol ethers le anionic surfactants. Thuto ea ho sebelisana pakeng tsa alkyl glycosides le anionic kapa cationic surfactants le boikemisetso ba bokhoni ba emulsion bo bontša hore li-alkyl glycosides micelles li na le tefiso e mpe ea pH. mefuta e fapaneng ea 3 ~ 9. Ka lehlakoreng le leng, tefiso ea alkyl polyethylene glycol ether micelles e fokola hantle kapa e haufi le zero. Lebaka leo ka lona alkyl glycoside micelles e qosoang hampe ha e so hlalosoe ka botlalo.