Nke mbụ, a na-egwepịa mkpụrụ osisi cellulose nke a nụchara anụcha, ma tinyezie ya n'ime ntụ ọka soda. Tinye olefin oxide (dị ka ethylene oxide ma ọ bụ propylene oxide) na methyl chloride maka etherification. N'ikpeazụ, a na-asachapụ mmiri na ịdị ọcha iji nweta ọchamethylcellulosentụ ntụ. Nke a ntụ ntụ, karịsịa ya aqueous ngwọta, nwere mmasị anụ ahụ Njirimara. Eter cellulose eji na ụlọ ọrụ ihe owuwu bụ methyl hydroxyethyl cellulose ether ma ọ bụ methyl hydroxypropyl cellulose (nke a na-akpọ MHEC ma ọ bụ MHPC, ma ọ bụ aha dị mfe karị MC). Ngwaahịa a na-arụ ọrụ dị oke mkpa n'ọhịa nke akọrọ ntụ ntụ ntụ. ọrụ dị mkpa.
Kedu ihe bụ njigide mmiri nke methyl cellulose ether (MC)?
Azịza: Ọkwa nke njide mmiri bụ otu n'ime ihe ndị dị mkpa na-egosi ịdị mma nke methyl cellulose ether, karịsịa n'ime obere oyi akwa na-ewu nke simenti dabeere na gypsum. Ejikwa mmiri emelitere nke ọma nwere ike igbochi ihe omume nke mfu ike na mgbawa nke ihicha oke na enweghị hydration kpatara. Njide mmiri dị mma nke methyl cellulose ether n'okpuru ọnọdụ okpomọkụ dị elu bụ otu n'ime ihe ndị dị mkpa na-egosi ọdịiche dị na arụmọrụ nke methyl cellulose ether. N'okpuru ọnọdụ nkịtị, njide mmiri nke methyl cellulose ethers na-emekarị na-ebelata na mmụba nke okpomọkụ. Mgbe okpomọkụ na-ebili na 40 Celsius C, njigide mmiri nke methyl cellulose ethers na-emekarị na-ebelata nke ukwuu, nke dị ezigbo mkpa na ebe ọkụ na akọrọ. Na ihe owuwu nke dị mkpa n'akụkụ anwụ na-acha n'oge okpomọkụ ga-enwe mmetụta dị njọ. Otú ọ dị, ime ka ọ bụrụ na enweghi njide mmiri site na nnukwu doses ga-eme ka viscosity dị elu nke ihe ahụ n'ihi nnukwu doses, nke ga-eme ka ọ ghara ịdị na-ewu ụlọ.
Njide mmiri dị ezigbo mkpa iji kwalite usoro siri ike nke sistemụ gelling ịnweta. N'okpuru ọrụ cellulose ether, a na-eji nwayọọ nwayọọ na-ahapụ mmiri ahụ na oyi akwa ma ọ bụ ikuku ruo ogologo oge, si otú a na-ahụ na ihe ciment (ciment ma ọ bụ gypsum) nwere ogologo oge iji mee ka mmiri na-emekọ ihe ma jiri nwayọọ nwayọọ sie ike.
Gịnị bụ ọrụ nke methyl cellulose ether na akọrọ ntụ ntụ ngwa agha?
Methyl hydroxyethyl cellulose ether (MHEC) na methyl hydroxypropyl cellulose ether (HPMC) na-akpọkọta ọnụ dị ka methyl cellulose ether.
N'ebe a na-eji ntụ ntụ ntụ akọrọ, methyl cellulose ether bụ ihe dị mkpa gbanwetụrụ maka ngwa ngwa ntụ ntụ dị ka plasta, gypsum plasta, nrapado tile, putty, ihe na-edozi onwe ya, ngwa agha na-agba agba, akwụkwọ ahụaja gluu na ihe caulking. N'ime ụrọ dị iche iche akọrọ akọrọ, methyl cellulose ether na-arụkarị ọrụ nke njide mmiri na ịgbatị.
Oge nzipu: Jan-09-2023