Physicochemical Properties ya Alkyl Polyglycosides-Phase khalidwe

Binary systems

Chithunzi cha gawo la C12-14 alkyl polyglycoside (C12-14 APG) / dongosolo lamadzi limasiyana ndi la APG lalifupi lachidule. (Chithunzi 3). Pakutentha kotsika, dera lolimba / lamadzimadzi pansi pa malo a Krafft limapangidwa, limakhala pamtunda wambiri. Ndi kuwonjezeka kwa kutentha, dongosolo limasintha kukhala gawo la madzi a isotropic. Chifukwa crystallization imachedwa mochedwa kwambiri, malire a gawoli amasintha malo ndi nthawi yosungira. Pamalo otsika, gawo lamadzimadzi la isotropic limasintha pamwamba pa 35 ℃ kukhala gawo la magawo awiri amadzimadzi, monga momwe zimachitikira ndi ma nonionic surfactants. Pa ndende pamwamba 60% ndi kulemera, mndandanda wa madzi crystalline gawo aumbike pa kutentha zonse. Ndikoyenera kutchula kuti m'dera la isotropic single phase, kutsekemera koonekera bwino kumatha kuwonedwa pamene ndende imakhala yocheperapo kusiyana ndi gawo losungunuka, ndiyeno imasowa mofulumira pambuyo pomaliza kumeta ubweya. Komabe, palibe dera la polyphase lomwe linapezeka kuti likulekanitsidwa ndi gawo la L1. Mu gawo la L1, dera lina lomwe lili ndi kufooka kothamanga kwa birefringence lili pafupi ndi mtengo wochepera wa kusiyana kwa madzi/madzimadzi.
Kufufuza kwa phenomenological pamapangidwe a magawo amadzimadzi a crystalline kunachitika ndi Platz et al. Kugwiritsa ntchito njira monga polarization microscopy. Kutsatira kafukufukuyu, zigawo zitatu zosiyana za lamellar zimaganiziridwa mu mayankho a C12-14 APG: Lα_l,La_lhndi Lah. Pali mitundu itatu yosiyana malinga ndi polarization microscopy.
Pambuyo kusungidwa kwa nthawi yayitali, gawo lamadzimadzi la lamellar crystalline limapanga zigawo zakuda za pseudoisotropic pansi pa kuwala kowala. Maderawa ndi olekanitsidwa bwino ndi madera omwe ali ndi birefringent kwambiri. Gawo la Lαh, lomwe limapezeka m'chigawo chapakati cha chigawo chamadzimadzi cha crystalline gawo, pa kutentha kwakukulu, limasonyeza mawonekedwe otere. Maonekedwe a Schlieren samawonedwa, ngakhale kuti mikwingwirima yamafuta ambiri imakhalapo. Ngati chitsanzo chokhala ndi gawo la Lαh chazizidwa kuti mudziwe malo a Krafft, mawonekedwe ake amasintha pansi pa kutentha kwake. Madera a pseudoisotropic ndi mikwingwirima yodziwika bwino yamafuta amatha. Poyambirira, palibe C12-14 APG yomwe imawonekera, m'malo mwake, gawo latsopano la lyotropic lomwe likuwonetsa kufooka kokhako kumapangidwa. Pamalo okwera kwambiri, gawoli limakula mpaka kutentha kwambiri. Pankhani ya alkyl glycosides, pali vuto lina.Ma electrolyte onse, kupatulapo sodium hydroxide, amachepetsa kwambiri ma point a mitambo. .Chodabwitsa n'chakuti pali kusiyana kochepa kwambiri pakati pa electrolytes payekha.Kuwonjezera kwa alkali kunachepetsa kwambiri mtambo. Kuti tifotokoze kusiyana kwa makhalidwe pakati pa ma alkyl polyglycol ethers ndi alkyl polyglycol ethers, zimaganiziridwa kuti gulu la OH lomwe linasonkhanitsidwa mugawo la shuga ladutsa mitundu yosiyanasiyana ya hydration ndi gulu la ethylene oxide. Mphamvu yokulirapo ya ma elekitirodi pa Alkyl polyglycol ether ikuwonetsa kuti pali mtengo pamwamba pa alkyl polyglycoside micelles, pomwe ma alkyl polyethylene glycol ethers samapeza ndalama.
Chifukwa chake, ma alkyl polyglycosides amakhala ngati osakaniza a alkyl polyglycol ethers ndi anionic surfactants. osiyanasiyana 3 ~ 9. Mosiyana, malipiro a alkyl polyethylene glycol ether micelles ndi ofooka zabwino kapena pafupi ziro. Chifukwa chomwe ma alkyl glycoside micelles amayimbidwa molakwika sichinafotokozedwe mokwanira.