N'ime ngwa agha agwakọtara agwakọta, mgbakwunye nke hydroxypropyl methyl cellulose HPMC dị ntakịrị, mana ọ nwere ike imeziwanye arụmọrụ nke ngwa agha mmiri, nke bụ nnukwu mgbakwunye na-emetụta arụmọrụ nke ngwa agha ahụ. Cellulose ethers dị iche iche viscosity na agbakwunyere ego nwere mmetụta dị mma na mma nke arụmọrụ nke akọrọ ngwa agha. Ka ọ dị ugbu a, ọtụtụ ngwa agha masonry na plasta nwere ezigbo njide mmiri, na nkewa mmiri na-apụta mgbe nkeji ole na ole guzoro. Njide mmiri bụ ọrụ dị mkpa nke methyl cellulose ether, ọ bụkwa arụmọrụ nke ọtụtụ ndị na-emepụta ngwa ngwa ụlọ, karịsịa ndị nọ n'ebe ndị nwere okpomọkụ dị elu na ndịda, na-aṅa ntị. Ihe ndị na-emetụta mmetụta njide mmiri nke ngwa ngwa akọrọ gụnyere ọnụ ọgụgụ nke HPMC agbakwunyere, viscosity nke HPMC, ịdị mma nke ihe na okpomọkụ nke gburugburu ebe a na-eji ya eme ihe.
1. Echiche: Cellulose ether bụ sịntetik elu molekul polymer mere si eke cellulose site chemical mgbanwe. Cellulose ether bụ ihe sitere na cellulose eke. Ihe mmepụta nke cellulose ether dị iche na polymers sịntetik. Ihe kachasị mkpa ya bụ cellulose, ngwakọta polymer eke. N'ihi usoro pụrụ iche nke cellulose eke, cellulose n'onwe ya enweghị ike imeghachi omume na ndị na-eme ka etherifying. Ma mgbe a gwọchara onye na-ere ọzịza ahụ, njikọ hydrogen siri ike dị n'etiti ụdọ molekụla na n'ime agbụ ahụ na-emebi, mwepụta na-arụ ọrụ nke otu hydroxyl na-atụgharị ghọọ cellulose alkali na-arụ ọrụ. Mgbe onye ọrụ etherification meghachi omume, a na-atụgharị otu -OH na otu -OR. Nweta cellulose ether. Ọdịdị nke cellulose ether na-adabere n'ụdị, ọnụọgụ na nkesa nke ihe mgbakwunye. Nkewa nke cellulose ethers na-adaberekwa n'ụdị ihe ngbanwe, ogo nke etherification, solubility na ngwa ndị metụtara ya. Dị ka ụdị ihe ndị na-anọchi anya na eriri molecular, enwere ike kewaa ya na monoether na ngwakọta ether. HPMC anyị na-ejikarị bụ ether agwakọta. Hydroxypropyl methyl cellulose ether HPMC bụ ngwaahịa nke akụkụ nke hydroxyl otu na unit na-anọchi methoxy otu na nke ọzọ na-anọchi na hydroxypropyl otu. A na-ejikarị HPMC eme ihe n'ihe owuwu ụlọ, mkpuchi latex, ọgwụ, kemịkalụ kwa ụbọchị, wdg. A na-eji ya dị ka thickener, onye na-ejigide mmiri, stabilizer, dispersant, na onye na-emepụta ihe nkiri.
2.Mwepu mmiri nke cellulose ether: na mmepụta nke ihe owuwu ụlọ, karịsịa ngwa ngwa akọrọ, cellulose ether na-arụ ọrụ na-enweghị atụ, karịsịa na mmepụta nke ngwa agha pụrụ iche (mgbazigharị ngwa ngwa), ọ dị mkpa. akụrụngwa. Ọrụ dị mkpa nke cellulose ether na-agbaze mmiri na ngwa agha bụ isi n'akụkụ atọ. Otu bụ ihe magburu onwe njigide mmiri, nke ọzọ bụ mmetụta na agbanwe agbanwe na thixotropy nke ngwa agha, na nke atọ bụ mmekọrịta na ciment. Mmetụta njide mmiri nke cellulose ether na-adabere na mmịnye mmiri nke oyi akwa isi, ihe mejupụtara nke ngwa agha ahụ, ọkpụrụkpụ oyi akwa nke ngwa agha ahụ, ihe na-achọ mmiri nke ngwa ngwa, na oge nhazi oge nke coagulating. Njide mmiri nke cellulose ether n'onwe ya sitere na solubility na akpịrị ịkpọ nkụ nke cellulose ether n'onwe ya.
na ndim na thixotropy nke cellulose ether: Ọrụ nke abụọ nke cellulose ether-thickening na-adabere na: ogo nke polymerization nke cellulose ether, ngwọta ngwọta, okpomọkụ na ọnọdụ ndị ọzọ. Njirimara gelation nke ngwọta bụ ihe pụrụ iche nke alkyl cellulose na ihe ndị na-emepụta ya. Njirimara Gelation metụtara ogo ngbanwe, ntinye ngwọta na mgbakwunye.
Ikike njide mmiri dị mma na-eme ka hydration ciment dịkwuo mma, nwere ike imeziwanye ihe mgbochi mmiri nke mmiri mmiri mmiri, mee ka ike jikọta nke ngwa agha, na oge nwere ike gbanwee. Mgbakwunye nke cellulose ether na ngwa agha ịgbasa igwe nwere ike imeziwanye nrịbama ma ọ bụ mgbapụta nke ngwa agha ahụ, yana ike nhazi. Ya mere, a na-eji cellulose ether eme ihe n'ọtụtụ ebe dị ka ihe mgbakwunye dị mkpa na ngwa ngwa agwakọta.
Oge nzipu: Dec-16-2021