Sifooyinka Kiimikaad ee Alkyl Polyglycosides-dabeecadda wajiga

Nidaamyada binary

Jaantuska wejiga ee C12-14 alkyl polyglycoside (C12-14 APG)/nidaamka biyaha ayaa ka duwan kan APG-ga-gaaban.(Jaantuska 3).Heerkulka hoose, gobol adag/ dareere ah oo ka hooseeya barta Krafft ayaa la sameeyay, kaas oo ka sarreeya xaddi ballaadhan.Kordhinta heerkulka, nidaamku wuxuu isu beddelaa wejiga dareeraha isotropic.Sababtoo ah crystallization-ku si xoog leh ayuu dib u dhac ku yimid ilaa xad, xadka wajigani wuxuu bedelayaa booska wakhtiga kaydinta.Xajmiga hooseeya, heerka dareeraha isotropic wuxuu isu beddelaa in ka sarreeya 35 ℃ wuxuuna u beddelaa gobol laba weji ah oo ka kooban laba weji oo dareere ah, sida caadiga ah waxaa lagu arkay surfactants nonionic.Xaddiga ka sarreeya 60% miisaan ahaan, isku xigxiga wajiga crystalline dareeraha ayaa la sameeyay heerkul kasta.Waxaa xusid mudan in gobolka hal waji ee isotropic, qulqulka qulqulka cad ee qulqulka ayaa la arki karaa marka diiradda la saaro oo kaliya ka hooseysa marxaladda kala diri, ka dibna si degdeg ah u baaba'a ka dib marka habka dhogorta la dhammeeyo.Si kastaba ha ahaatee, lama helin gobol polyphase ah oo ka go'ay wejiga L1.Marxaladda L1, gobol kale oo leh qulqulka qulqulka daciifka ah ayaa ku yaal meel u dhow qiimaha ugu yar ee farqiga dareeraha / dareeraha.
Baaritaannada phenomenological ee qaab dhismeedka wejiyada crystalline dareeraha waxaa sameeyay Platz et al.Isticmaalka hababka sida microscope polarization.Baaritaannadan ka dib, saddex gobol oo kala duwan ayaa loo tixgaliyaa xalalka C12-14 APG ee xoogga leh: Lα_{l ,}Lα_lhiyo Lah.Waxaa jira saddex textures oo kala duwan marka loo eego microscopy polarization.
Ka dib markii la kaydiyo wakhti dheer, heerka caadiga ah ee dareeraha lamellar ee crystalline wuxuu kobciyaa gobollada mugdiga ah ee pseudoisotropic oo hoos yimaada iftiinka polaized.Gobolladan waxay si cad uga soocan yihiin aagagga aadka u kala fog.Marxaladda Lαh, oo ku dhacda qiyaasta dhexdhexaadka ah ee dhexdhexaadka ah ee gobolka wejiga crystalline dareeraha, heerkulka xad sarreeya, wuxuu muujinayaa textures.Qoraallada Schlieren waligood lama arkin, in kasta oo xadhko saliid leh oo xoog leh ay caadi ahaan jiraan.Haddii muunad ka kooban wejiga Lαh la qaboojiyo si loo go'aamiyo barta Krafft, qaab-dhismeedku wuu isbeddelaa ka hooseeya heerkulka sifada.Gobollada pseudoisotropic iyo meelaha saliidda leh ee si cad loo qeexay way baaba'aan.Markii hore, ma jiro C12-14 APG crystallizes, halkii, weji lyotropic cusub oo muujinaya kaliya birefringence daciif ah ayaa la sameeyay.Marka la eego xaddi aad u sarreeya, wejigani wuxuu ku fidaa heerkul sare.Marka laga hadlayo alkyl glycosides, xaalad kala duwan ayaa soo baxaysa. Dhammaan electrolytes, marka laga reebo sodium hydroxide, waxay keentay hoos u dhac weyn oo ku yimaada dhibcaha daruuraha. Kala duwanaanta fiirsashada ee electrolytes waxay ku saabsan tahay amar ka hooseeya kan alkyl polyetylen glycol ethers. Waxaa la yaab leh, waxaa jira farqi aad u yar oo u dhexeeya electrolytes-ka shakhsi ahaaneed. Ku darida alkali waxay si weyn u yaraysay daruuraha.Si loo sharaxo kala duwanaanshaha habdhaqanka ee u dhexeeya alkyl polyglycol ethers iyo alkyl polyglycol ethers, waxaa loo maleynayaa in kooxda OH ee ku ururtay unugga gulukooska ay soo mareen noocyo kala duwan oo fuuq-bax ah oo ay la socdaan kooxda ethylene oxide.Saamaynta aadka u weyn ee electrolytes-ka ee Alkyl polyglycol ethers waxay soo jeedinaysaa in ay jirto lacag dusha sare ee alkyl polyglycoside micelles, halka alkyl polyethylene glycol ethers ay u malaynayaan wax lacag ah.
Sidaa daraadeed, alkyl polyglycosides waxay u dhaqmaan sida isku dhafka alkyl polyglycol ethers iyo anionic surfactants.Daraasadda isdhexgalka ka dhexeeya alkyl glycosides iyo anionic ama cationic surfactants iyo go'aaminta suurtagalnimada emulsion waxay muujinaysaa in alkyl glycosides micelles ay leeyihiin dusha sare ee kharashka pH. kala duwan ee 3 ~ 9. Taas bedelkeeda, kharashka alkyl polyetylen glycol ether micelles waa liidata wanaagsan ama ku dhow eber.Sababta alkyl glycoside micelles si xun loogu dalacay si buuxda looma sharaxin.