Physicochemical Properties yeAlkyl Polyglycosides-Phase maitiro

Binary systems

Iyo chikamu dhayagiramu yeC12-14 alkyl polyglycoside (C12-14 APG) / system yemvura inosiyana neiyo yepfupi-cheni APG.(Mufananidzo 3).Pakudziya kwakadzika, nzvimbo yakasimba / yemvura pazasi peKrafft point inoumbwa, iyo pamusoro pehupamhi hwekusungwa.Nekuwedzera kwekushisa, iyo system inoshanduka kuita isotropic fluid chikamu.Nekuti iyo crystallization inodzoserwa kinetically kusvika pamwero wakati, chikamu ichi muganhu chinoshandura chinzvimbo nenguva yekuchengetedza.Pakudzika kwakadzika, isotropic fluid chikamu chinoshanduka pamusoro pe35 ℃ kuita dunhu rezvikamu zviviri zvezvikamu zviviri zvemvura, sezvinowanzoonekwa nevasina nonionic surfactants.Pakuiswa pamusoro pe60% nehuremu, kutevedzana kwemvura yekristalline chikamu inoumbwa pane ese tembiricha.Zvakakodzera kutaura kuti munharaunda ye isotropic single phase, kuyerera kuri pachena kwebirefringence kunogona kucherechedzwa kana iyo yekumisikidza ichangodzikira pane yakanyungudika chikamu, uye yobva yanyangarika nekukurumidza mushure mekuita kwekugera kwapera.Nekudaro, hapana dunhu repolyphase rakawanikwa rakapatsanurwa kubva kuL1 chikamu.Muchikamu cheL1, imwe dunhu isina kusimba kuyerera kwebirefringence inowanikwa padyo neukoshi hushoma hwemvura/mvura yekusagadzikana gap.
Phenomenological kuferefeta muchimiro cheiyo mvura crystalline zvikamu yakaitwa naPlatz et al.Kushandisa nzira dzakadai sepolarization microscopy.Kutevera kuferefeta uku, matunhu matatu akasiyana elamellar anotariswa mune yakadzika C12-14 APG mhinduro: Lα._{l ,}Lα_lhuye Lah.Kune matatu akasiyana maumbirwo zvinoenderana nepolarization microscopy.
Mushure mekuchengetwa kwenguva yakareba, yakajairwa lamellar fluid crystalline chikamu inokura yakasviba pseudoisotropic nzvimbo pasi pechiedza chepolarized.Aya matunhu akapatsanurwa zvakajeka kubva munzvimbo dzine birefringent.Iyo Lαh chikamu, iyo inoitika mukati meyepakati yekusangana kweiyo yemvura crystalline chikamu dunhu, pane yakanyanya kupisa tembiricha, inoratidza maumbirwo akadaro.Schlieren maumbirwo haambocherechedzwa, kunyangwe akasimba birefringent mafuta streaks anowanzo kuve aripo.Kana sampuli ine chikamu cheLαh yakatonhodzwa kuti ione nzvimbo yeKrafft, magadzirirwo anochinja pazasi pehunhu tembiricha.Matunhu epseudoisotropic uye iwo anotsanangurwa zvakajeka ane mafuta mitsetse anonyangarika.Pakutanga, hapana C12-14 APG inopenya, pane kudaro, chikamu chitsva che lyotropic chinoratidza chete chisina kusimba birefringence chinoumbwa.Pakunyanya kukwira, chikamu ichi chinowedzera kusvika pakupisa kwakanyanya.Panyaya yealkyl glycosides, mamiriro akasiyana anobuda.Ese electrolytes, kunze kwe sodium hydroxide, yakaguma nekuderera kukuru kwe cloud points.The concentration range of electrolytes is about an order of magnitude under the alkyl polyethylene glycol ethers. .Zvinoshamisa kuti kune misiyano shoma shoma pakati pe electrolytes yega yega.Kuwedzerwa kwealkali kwakaderedza zvakanyanya kusvibiswa kwegore.Kuti utsanangure kusiyana kwemaitiro pakati pealkyl polyglycol ethers uye alkyl polyglycol ethers, inofungidzirwa kuti boka reOH rakaunganidzwa muchikwata cheglucose rakaita mhando dzakasiyana dze hydration neboka re ethylene oxide.Kunyanya kuita maelectrolyte paAlkyl polyglycol ethers kunoratidza kuti pane kubhadharisa pamusoro pealkyl polyglycoside micelles, nepo alkyl polyethylene glycol ethers isingabhadhari.
Nokudaro, alkyl polyglycosides inoita semisanganiswa yealkyl polyglycol ethers uye anionic surfactants.Chidzidzo chekubatana pakati pealkyl glycosides uye anionic kana cationic surfactants uye kutsunga kwezvinogona kuitika mu emulsion zvinoratidza kuti alkyl glycosides micelles ine pH yakashata mupH. huwandu hwe3 ~ 9.Mukupesana, mutero wealkyl polyethylene glycol ether micelles haina simba yakanaka kana pedyo ne zero.Chikonzero nei alkyl glycoside micelles ichichajwa zvisina kunaka hachina kutsanangurwa zvizere.