Sodium carboxymethyl cellulose (CMC), e tsejoang hape e le carboxymethyl cellulose.Ke polymer cellulose ether e entsoeng ka ho fetola lik'hemik'hale cellulose ea tlhaho, 'me sebopeho sa eona se entsoe haholo-holo ka li-unit tsa D-glucose tse kopantsoeng ke β_(14) glycosidic bond.
CMC ke phofo e tšoeu kapa e tšoeu ea milky kapa granules e nang le boima ba 0.5g/cm3, e batlang e sa latsoehe, ha e na monko le hygroscopic.
Carboxymethyl cellulose e bonolo ho qhalakanngoa, e etsa motsoako o hlakileng oa colloidal ka metsing, 'me ha e qhibilihe ka har'a metsoako ea tlhaho e kang ethanol.
Ha pH>10, boleng ba pH ba 1% ea tharollo ea metsi ke 6.5≤8.5.
Karabelo e kholo ke e latelang: selulose ea tlhaho e qala ho alkalized le NaOH, ebe chloroacetic acid e ea eketsoa, 'me hydrogen e sehlopheng sa hydroxyl se sehlopheng sa glucose e arabela le sehlopha sa carboxymethyl ho chloroacetic acid.
Ho ka bonoa ka sebopeho hore ho na le lihlopha tse tharo tsa hydroxyl yuniti e 'ngoe le e 'ngoe ea tsoekere, e leng lihlopha tsa C2, C3 le C6 tsa hydroxyl, le tekanyo ea sebaka sa haedrojene sehlopheng sa hydroxyl sa yuniti ea tsoekere e emeloa ke matšoao a 'mele le a lik'hemik'hale.
Haeba li-hydrogen lihlopheng tse tharo tsa hydroxyl karolong e 'ngoe le e' ngoe li nkeloa sebaka ke lihlopha tsa carboxymethyl, joale tekanyo ea ho fetola e hlalosoa e le 7-8, ka tekanyo e kholo ea ho fetola 1.0 (mophato oa lijo o ka finyella tekanyo ena feela).Tekanyo ea ho nka sebaka sa CMC e ama ka ho toba ho solubility, emulsification, thickening, botsitso, ho hanyetsa acid le ho hanyetsa letsoai la CMC.
Ha re sebelisa lihlahisoa tsa CMC, re lokela ho utloisisa ka botlalo lintlha tse ka sehloohong tsa index, tse kang botsitso, viscosity, ho hanyetsa acid, viscosity, joalo-joalo.
Ehlile, lits'ebetso tse fapaneng li sebelisa selulose e fapaneng ea carboxymethyl, hobane ho na le mefuta e mengata ea viscosity e sebetsang ho carboxymethyl cellulose, le matšoao a 'mele le a lik'hemik'hale le ona a fapane.Ho tseba tsena, u ka tseba ho khetha sehlahisoa se nepahetseng.
Nako ea poso: Nov-07-2022