Cellulose ether bụ polymer sịntetik nke sitere na cellulose eke sitere na mgbanwe kemịkalụ.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 ihe dị iche iche nke usoro cellulose eke, cellulose n'onwe ya enweghị ike imeghachi omume na ndị ọrụ etherification.Otú ọ dị, mgbe ọgwụgwọ nke onye na-amụba ihe, a na-ebibi njikọ siri ike hydrogen n'etiti ụdọ molecular na agbụ, na ntọhapụ na-arụ ọrụ nke hydroxyl otu na-aghọ cellulose alkali na-emeghachi omume.Nweta cellulose ether.
Njirimara nke cellulose ethers na-adabere n'ụdị, ọnụ ọgụgụ na nkesa nke ndị nọchiri anya ya.A na-ekewakwa nhazi nke cellulose ether dị ka ụdị ihe mgbakwunye, ogo nke etherification, solubility na ngwa ngwa metụtara ya.Dị ka ụdị ihe ndị na-anọchi anya na eriri molecular, enwere ike kewaa ya na monoether na ngwakọta ether.MC anyị na-ejikarị bụ monoether, na HPMC bụ ngwakọta ether.Methyl cellulose ether MC bụ ngwaahịa mgbe hydroxyl otu na glucose unit nke eke cellulose dochie methoxy.Ọ bụ ngwaahịa enwetara site na iji otu methoxy dochie akụkụ nke hydroxypropyl na otu akụkụ nke otu hydroxypropyl.Usoro nhazi bụ [C6H7O2(OH)3-mn(OCH3)m[OCH2CH(OH)CH3]n]x Hydroxyethyl methyl cellulose ether HEMC, ndị a bụ ụdị ndị a na-ejikarị na-ere n'ahịa.
N'ihe gbasara solubility, enwere ike kewaa ya na ionic na ndị na-abụghị ionic.Mmiri-soluble na-abụghị ionic cellulose ethers bụ tumadi mejupụtara abụọ usoro nke alkyl ethers na hydroxyalkyl ethers.A na-ejikarị Ionic CMC eme ihe n'ihe ndị sịntetịt, mbipụta textile na akwa akwa, nchọpụta nri na mmanụ.Ndị na-abụghị ionic MC, HPMC, HEMC, wdg bụ ndị a na-ejikarị na ihe owuwu, mkpuchi latex, ọgwụ, kemịkalụ kwa ụbọchị, wdg A na-eji dị ka thickener, mmiri na-ejide mmiri, stabilizer, dispersant na film forming agent.
Nchọpụta mma nke cellulose ether:
Mmetụta nke ọdịnaya methoxyl na ịdị mma: njide mmiri na ịrụ ọrụ nke ukwuu
Mmetụta dị mma nke ọdịnaya hydroxyethoxyl/hydroxypropoxyl: ka ọdịnaya dị elu, ka mma na-ejigide mmiri.
Mmetụta nke ịdị mma viscosity: ọkwa dị elu nke polymerization, nke dị elu nke viscosity na mma njigide mmiri.
Mmetụta nke ịdị mma nke ọma: nke ọma na mgbasa na mgbasa na ngwa agha ahụ, ngwa ngwa na nke edobere ya, na njigide mmiri dị n'akụkụ dị mma.
Mmetụta dị mma nke nnyefe ọkụ: ka ogo polymerization dị elu, ka ogo nke polymerization na-edowe anya, na obere adịghị ọcha.
Mmetụta ịdị mma nke gel: Gel okpomọkụ maka ihe owuwu dị gburugburu 75 Celsius
Mmetụta nke àgwà mmiri: <5%, cellulose ether dị mfe ịmịkọrọ mmiri, n'ihi ya, a ga-emechi ya ma chekwaa ya.
Mmetụta ịdị mma uyi: <3%, ka ntụ na-adị elu, na-enwekwu adịghị ọcha
Mmetụta ịdị mma PH bara uru: nso na-anọpụ iche, cellulose ether nwere arụmọrụ kwụsiri ike n'etiti PH: 2-11
Oge nzipu: Feb-14-2023