Hydroxyethyl Cellulose ke eng?
Hydroxyethyl cellulose (HEC), e bosehla bo bosoeu kapa bo bobebe, bo se nang monko, bo se nang chefo kapa bo tiileng, bo lokisitsoeng ke karabelo ea etherification ea alkaline cellulose le ethylene oxide (kapa chlorohydrin), ke ea Nonionic soluble cellulose ethers. Kaha 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, lijo, masela, ho etsa pampiri le polymerization ea polymerization. le masimo a mang.
Ho etsahala'ng ha hydroxyethyl cellulose e kopana le pente e thehiloeng metsing?
Joaloka sehlahisoa se se nang ionic, hydroxyethyl cellulose e na le lintho tse latelang ho phaella ho ho teteaneng, ho emisa, ho tlama, ho phaphamala, ho etsa filimi, ho qhalakanngoa, ho boloka metsi le ho fana ka colloid e sireletsang:
HEC e qhibiliha ka metsing a chesang kapa a batang, mocheso o phahameng kapa o belang ntle le pula, e le hore e be le mefuta e mengata ea ho qhibiliha le litšoaneleho tsa viscosity, le gelation e sa chesang;
Matla a ho boloka metsi a phahame habeli ho feta a methyl cellulose, 'me a na le taolo e ntle ea phallo;
Ha e na ionic 'me e ka phela hammoho le mefuta e mengata e mengata ea li-polymers tse qhibilihang metsing, li-surfactants le matsoai. Ke colloidal thickener e babatsehang bakeng sa tharollo ea electrolyte e phahameng haholo;
Ha ho bapisoa le methyl cellulose e tsejoang le hydroxypropyl methyl cellulose, bokhoni ba ho qhalakanngoa ba HEC ke bona bo bobe ka ho fetisisa, empa matla a tšireletso a colloid ke a matla ka ho fetisisa.
Mokhoa oa ho sebelisa hydroxyethyl cellulose? Joang ho e eketsa?
1. Eketsa ka ho toba tlhahiso
Mokhoa ona ke o bonolo ka ho fetisisa 'me o nka nako e khutšoanyane.
Kenya metsi a hloekileng ka nkhong e kholo e nang le motsoako o phahameng oa ho kuta. Qala ho sisinya o sa khaotse ka lebelo le tlaase 'me butle-butle u sefa hydroxyethyl cellulose ka har'a tharollo ka ho lekana. Tsoela pele ho hlohlelletsa ho fihlela likaroloana tsohle li kolobile. Ebe u eketsa li-preservatives le li-additives tse fapaneng. Tse kang li-pigments, lithuso tsa ho qhalakanya, metsi a ammonia, joalo-joalo Hlohlelletsa ho fihlela cellulose eohle ea hydroxyethyl e qhibiliha ka ho feletseng (viscosity ea tharollo e eketseha haholo) pele o eketsa likarolo tse ling ka mokhoa oa ho itšoara.
2. Ho e-na le joala ba 'm'e bo emetseng
Ke ho lokisa joala ba 'm'e ka khatello e phahameng pele, ebe o e eketsa sehlahisoa. Molemo oa mokhoa ona ke hore o na le phetoho e kholoanyane 'me e ka kenyelletsoa ka ho toba sehlahisoa se phethiloeng, empa se tlameha ho bolokoa hantle. Mehato ea mokhoa ona e tšoana le mehato e mengata ea mokhoa oa 1; phapang ke hore ha ho hlokahale hore ho be le agitator e phahameng, 'me ke li-agitator tse ling feela tse nang le matla a lekaneng a ho boloka cellulose ea hydroxyethyl ka mokhoa o ts'oanang e qhalakantsoeng ka tharollo e ka tsoela pele ntle le ho emisa Ho hlohlelletsa ho fihlela e qhibiliha ka ho feletseng ka tharollo ea viscous. Leha ho le joalo, ho lokela ho hlokomeloa hore sebolaea-khuru se tlameha ho eketsoa ho joala ba 'm'e kapele kamoo ho ka khonehang.
Malebela a mosa
Kaha selulose ea hydroxyethyl e entsoeng ka holim'a metsi ke phofo kapa fibrous solid, ha u lokisetsa joala ba 'mè oa hydroxyethyl cellulose, u hopotsa hore u ele hloko lintlha tse latelang:
(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 fafatsoa butle-butle ka tanka ea motsoako, 'me u se ke ua tšela cellulose ea hydroxyethyl ka har'a tanka ea ho kopanya ka bongata kapa ka ho toba ka har'a likotola le libolo.
(3) Mocheso oa metsi le boleng ba PH metsing li na le kamano ea bohlokoa le ho qhibiliha ha hydroxyethyl cellulose, kahoo ho lokela ho lefshoa tlhokomelo e khethehileng.
(4) Se ke oa kenya lintho tse ling tsa alkaline motsoakong pele phofo ea hydroxyethyl cellulose e kolobisoa ka metsi. Ho phahamisa pH ka mor'a ho koloba ho tla thusa ho qhibiliha.
(5) Eketsa moemeli oa antifungal ka hohle kamoo ho ka khonehang esale pele.
(6) Ha u sebelisa high-viscosity hydroxyethyl cellulose, mahloriso a joala ba 'mè ha aa lokela ho ba holimo ho 2.5-3% (ka boima ba' mele), ho seng joalo joala ba 'mè bo tla ba thata ho sebetsana le bona.
Nako ea poso: Mar-21-2023