Cellulose ether bụ polima sịntetik nke e ji 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 nkọwapụta nke usoro cellulose eke, cellulose n'onwe ya enweghị ike imeghachi omume na ihe ndị na-eme ka etherification dị. Agbanyeghị, mgbe ọgwụgwọ nke ihe na-eme ka ọzịza dị, njikọ hydrogen siri ike dị n'etiti agbụ molekul na agbụ ahụ na-ebibi, mwepụta na-arụ ọrụ nke otu hydroxyl na-aghọ cellulose alkali reactive. Nweta cellulose ether.
Njirimara nke ethers cellulose dabere na ụdị, ọnụọgụ na nkesa nke ihe ndị na-anọchi anya ya. A na-ekewakwa nkewa nke cellulose ether dịka ụdị ihe ndị na-anọchi anya ya, ogo nke etherification, ịgbaze na njirimara ngwa ndị metụtara ya si dị. Dịka ụdị ihe ndị na-anọchi anya ya dị na yinye molekul si dị, enwere ike kewaa ya na monoether na ether agwakọtara agwakọta. MC anyị na-ejikarị bụ monoether, HPMC bụkwa ether agwakọtara agwakọta. Methyl cellulose ether MC bụ ngwaahịa mgbe ejiri methoxy dochie otu hydroxyl na nkeji glucose nke cellulose eke. Ọ bụ ngwaahịa a na-enweta site na iji otu methoxy dochie akụkụ nke otu hydroxyl na nkeji ahụ na otu methoxy na akụkụ ọzọ na 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 bụ isi a na-ejikarị ma na-ere n'ahịa.
Maka ịgbaze mmiri, enwere ike kewaa ya ụzọ ionic na non-ionic. Ethers cellulose na-agbaze mmiri na-abụkarị usoro alkyl ethers na hydroxyalkyl ethers. A na-ejikarị Ionic CMC eme ihe n'ihe e ji asa ákwà, ibipụta ákwà na agba agba, nchọpụta nri na mmanụ. A na-ejikarị Non-ionic MC, HPMC, HEMC, wdg eme ihe n'ihe owuwu, 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 na ihe na-emepụta ihe nkiri.
Njirimara dị mma nke cellulose ether:
Mmetụta nke ọdịnaya methoxyl na mma: ọrụ idobe mmiri na oke ọkpụrụkpụ
Mmetụta dị mma nke ọdịnaya hydroxyethoxyl/hydroxypropoxyl: ka ọdịnaya dị elu, otú ahụ ka njigide mmiri ka mma.
Mmetụta nke ịdị mma nke viscosity: ọkwa polymerization ka elu, viscosity ka elu ma ka mma idobe mmiri.
Mmetụta nke ịdị mma dị mma: ka mgbasa na mgbasa dị na ngwa agha ahụ si dị mma, otú ahụ ka ọ na-adị ngwa ngwa ma dịkwa ka ya, na njigide mmiri dị mma karịa
Mmetụta dị mma nke nnyefe ìhè: ọkwa polymerization dị elu, otú ahụ ka ogo polymerization si dị iche, na obere ihe ndị na-adịghị ọcha
Mmetụta ogo okpomọkụ nke jel: okpomọkụ jel maka owuwu dị ihe dịka 75°C
Mmetụta nke ịdị mma mmiri: <5%, cellulose ether dị mfe ịmịkọrọ mmiri, yabụ a ga-emechi ya ma chekwaa ya
Mmetụta mma ntụ: <3%, ka ntụ ahụ na-arị elu, otú ahụ ka ihe ndị na-adịghị ọcha na-abawanye
Mmetụta mma nke PH: dị nso na-anọpụ iche, cellulose ether nwere arụmọrụ kwụsiri ike n'etiti PH: 2-11
Oge ozi: Febụwarị-14-2023