Hydroxyethyl cellulose (HEC) ke 'mala o mosehla o mosoeu kapa o bobebe, o sa nkhang hamonate, o se nang chefo kapa oa phofo o lokisitsoeng ke etherification ea alkaline cellulose le ethylene oxide (kapa chlorohydrin). Nonionic soluble cellulose ethers. Ntle le ho tiisa, ho emisa, ho tlama, ho phaphamala, ho etsa filimi, ho hasana, ho boloka metsi le ho fana ka li-colloids tse sireletsang, e na le thepa e latelang:
1. HEC e qhibiliha ka metsing a chesang kapa a batang, 'me ha e na mocheso o phahameng kapa o belang, e le hore e be le mefuta e mengata ea ho qhibiliha le litšoaneleho tsa viscosity, le gelation e sa chesang;
2. The non-ionic ka boeona e ka phela hammoho le mefuta e mengata e mengata ea li-polymers tse qhibilihang ka metsing, li-surfactants le letsoai, 'me ke motsoako o babatsehang oa colloidal o nang le litharollo tse phahameng tsa electrolyte;
3. Matla a ho boloka metsi a phahame ka makhetlo a mabeli ho feta a methyl cellulose, 'me a na le taolo e ntle ea ho phalla.
4. Ha ho bapisoa le methyl cellulose e tsejoang le hydroxypropyl methyl cellulose, bokhoni ba ho qhalakanngoa ba HEC bo bobe ka ho fetisisa, empa colloid e sireletsang e na le matla a matla ka ho fetisisa. Hobane HEC e na le thepa e ntle ea ho teteka, ho emisa, ho qhalakanya, emulsifying, ho kopanya, ho etsa filimi, ho sireletsa mongobo le ho fana ka colloid e sireletsang, e 'nile ea sebelisoa haholo ho hlahloba oli, ho roala, ho haha, meriana le lijo, masela, pampiri le polymerization le masimo a mang.
Mehato ya tlhokomelo:
Kaha hydroxyethyl cellulose e entsoeng ka holimo ke phofo kapa cellulose e tiileng, ho bonolo ho sebetsana le ho qhibiliha ka metsing hafeela litaba tse latelang li hlokomeloa.
1. Pele le ka mor'a ho eketsa hydroxyethyl cellulose, e tlameha ho tsosoa ka ho tsoelang pele ho fihlela tharollo e hlakile ka ho feletseng le e hlakileng.
2. E tlameha ho hloekisoa ka har'a moqomo oa ho kopanya butle-butle, 'me u se ke ua eketsa ka ho toba hydroxyethyl cellulose e entsoeng ka likhahla le libolo ka har'a moqomo oa ho kopanya.
3. Mocheso oa metsi le pH ea metsi li na le kamano e totobetseng le ho qhibiliha ha hydroxyethyl cellulose, kahoo tlhokomelo e khethehileng e lokela ho lefshoa ho eona.
4. Le ka mohla u se ke ua kenya ntho e itseng ea alkaline motsoakong pele phofo ea hydroxyethyl cellulose e futhumatsoa ke metsi. Ho phahamisa boleng ba PH kamora ho futhumala hoa thusa bakeng sa ho qhibiliha.
5. Ka hohle kamoo ho ka khonehang, eketsa li-antifungal agents kapele kamoo ho ka khonehang.
6. Ha u sebelisa high-viscosity hydroxyethyl cellulose, mahloriso a joala ba 'mè ha aa lokela ho ba holimo ho 2.5-3%, ho seng joalo joala ba' mè bo tla ba thata ho sebetsana le bona. Hydroxyethyl cellulose ka mor'a ho phekoloa hangata ha ho bonolo ho etsa li-tumps kapa li-sphere, 'me e ke ke ea theha li-colloid tse chitja tse sa tsitsang ka mor'a ho eketsa metsi.
Nako ea poso: Nov-15-2022