N'ime ngwa agha a gwakọtara agwakọta, ọnụọgụ mgbakwunye nke hydroxypropyl methyl cellulose HPMC dị obere nke ukwuu, mana ọ nwere ike ime ka arụmọrụ nke ngwa agha mmiri ka mma nke ukwuu, nke bụ nnukwu ihe mgbakwunye nke na-emetụta arụmọrụ owuwu nke ngwa agha ahụ. Cellulose ethers nwere viscosity dị iche iche na ọnụọgụ agbakwunyere na-enwe mmetụta dị mma na mmezi nke arụmọrụ nke ngwa agha akọrọ. Ugbu a, ọtụtụ ngwa agha a na-eji ígwè na plastering enweghị ihe ejigide mmiri nke ọma, nkewa mmiri na-apụtakwa mgbe nkeji ole na ole nke iguzo ọtọ. Nchekwa mmiri bụ arụmọrụ dị mkpa nke methyl cellulose ether, ọ bụkwa arụmọrụ nke ọtụtụ ndị na-emepụta ngwa agha akọrọ n'ụlọ, karịsịa ndị nọ n'ebe nwere okpomọkụ dị elu na ndịda, na-elebara anya na ya. Ihe ndị na-emetụta mmetụta njide mmiri nke ngwa agha akọrọ gụnyere ọnụọgụ HPMC agbakwunyere, viscosity nke HPMC, ịdị mma nke ihe ndị ahụ na okpomọkụ nke gburugburu ebe ejiri ya.
1. Echiche: Cellulose ether bụ polima dị elu nke ejiri cellulose eke mee site na mgbanwe kemịkalụ. Cellulose ether bụ ihe sitere na cellulose eke. Mmepụta nke cellulose ether dị iche na polima sịntetik. Ihe kachasị mkpa ya bụ cellulose, ihe mejupụtara polymer eke. N'ihi nhazi pụrụ iche nke cellulose eke, cellulose n'onwe ya enweghị ike imeghachi omume na ihe ndị na-eme ka etherifying pụta. Mana mgbe a gwọchara ihe na-eme ka ọzịza ahụ dị, njikọ hydrogen siri ike dị n'etiti agbụ molekul na n'ime agbụ ahụ na-ebibi, mwepụta na-arụ ọrụ nke otu hydroxyl na-aghọkwa cellulose alkali na-emegharị ahụ. Mgbe ihe na-eme ka etherification meghachi omume, a na-agbanwe otu -OH ka ọ bụrụ otu -OR. Nweta cellulose ether. Ọdịdị nke cellulose ether dabere na ụdị, ọnụọgụ na nkesa nke ihe ndị na-eme ka ọ dị. Nhazi nke cellulose ethers daberekwa na ụdị ihe ndị na-eme ka ọ dị, ogo nke etherification, ịgbaze na ngwa ndị metụtara ya. Dịka ụdị ihe ndị dị na agbụ molekul si dị, enwere ike kewaa ya na monoether na ether agwakọtara. HPMC anyị na-ejikarị bụ ether agwakọtara. Hydroxypropyl methyl cellulose ether HPMC bụ ngwaahịa ebe a na-eji methoxy group dochie akụkụ nke hydroxyl otu dị na unit ahụ, ebe a na-ejikwa hydroxypropyl otu dochie akụkụ nke ọzọ. A na-ejikarị HPMC eme ihe n'ihe owuwu ụlọ, mkpuchi latex, ọgwụ, kemịkalụ kwa ụbọchị, wdg. A na-eji ya dị ka ihe na-eme ka ihe sie ike, ihe na-ejide mmiri, ihe na-eme ka ihe sie ike, ihe na-agbasa ihe, na ihe na-emepụta ihe nkiri.
2. Idobe mmiri nke cellulose ether: n'imepụta ihe owuwu ụlọ, ọkachasị moto akọrọ, cellulose ether na-arụ ọrụ a na-apụghị ịgbanwe agbanwe, ọkachasị n'imepụta moto pụrụ iche (moto agbanwere agbanwe), ọ dị oke mkpa. akụkụ. Ọrụ dị mkpa nke cellulose ether mmiri na-agbaze na moto bụ n'akụkụ atọ. Otu bụ ikike idobe mmiri nke ọma, nke ọzọ bụ mmetụta na nguzozi na thixotropy nke moto, nke atọ bụ mmekọrịta ya na simenti. Mmetụta idobe mmiri nke cellulose ether dabere na mmiri nke oyi akwa isi, ihe mejupụtara moto ahụ, ọkpụrụkpụ oyi akwa nke moto ahụ, mkpa mmiri nke moto ahụ, na oge ntọala nke ihe na-agbakọta. Idobe mmiri nke cellulose ether n'onwe ya sitere na mmiri na nkụ nke cellulose ether n'onwe ya.
Ịkpụ na thixotropy nke cellulose ether: Ọrụ nke abụọ nke ime ka ether cellulose dị nkọ dabere na: ogo nke ime ka ether cellulose dị nkọ, ntinye nke ngwọta, okpomọkụ na ọnọdụ ndị ọzọ. Njirimara ime ka e sie ike nke ngwọta bụ ihe pụrụ iche nke alkyl cellulose na ihe ndị e mepụtara emezigharịrị. Àgwà ime ka e sie ike metụtara ogo nnọchi, ntinye nke ngwọta na ihe mgbakwunye.
Ike nchekwa mmiri dị mma na-eme ka mmiri simenti zuo oke, ọ nwere ike ime ka mmiri dị na simenti ahụ dịkwuo mma, mee ka ike njikọ nke simenti ahụ dịkwuo elu, meekwa ka oge ya dịkwuo mma. Mgbakwunye nke cellulose ether na simenti a na-agba mmiri nwere ike ime ka ọrụ ịgbasa ma ọ bụ ịgbapụta simenti ka mma, yana ike nhazi ya. Ya mere, a na-eji cellulose ether eme ihe nke ukwuu dị ka ihe mgbakwunye dị mkpa na simenti a gwakọtara agwakọta.
Oge ozi: Disemba-16-2021