Cellulosebụ isi ihe dị na mgbidi mkpụrụ osisi, ọ bụkwa polysaccharide kachasị kesaa ma baa ụba n'okike, na-aza ihe karịrị 50% nke ihe dị na carbon n'alaeze osisi. N'ime ha, ọdịnaya cellulose nke owu dị nso na 100%, nke bụ isi iyi cellulose eke kachasị ọcha. N'ozuzu osisi, cellulose na-aza 40-50%, enwere 10-30% hemicellulose na 20-30% lignin. Cellulose ether bụ okwu izugbe maka ọtụtụ ihe ndị sitere na cellulose eke dị ka ihe eji emepụta ihe site na etherification. Ọ bụ ngwaahịa e mepụtara mgbe otu hydroxyl dị na cellulose macromolecules gbanwere akụkụ ma ọ bụ kpamkpam site na otu ether. Enwere njikọ hydrogen dị n'ime yinye na inter-chain na cellulose macromolecules, nke siri ike ịgbaze na mmiri na ihe fọrọ nke nta ka ọ bụrụ ihe niile na-agbaze organic, mana mgbe etherification gasịrị, iwebata otu ether nwere ike imeziwanye hydrophilicity ma mee ka mmiri na ihe mgbaze organic dịkwuo elu. Njirimara mgbaze.
A maara Cellulose ether nke ọma dịka "glutamate monosodium ụlọ ọrụ mmepụta ihe". O nwere ihe ndị dị mma dịka ime ka mmiri sie ike, ịgbaze mmiri nke ọma, nkwụsi ike ma ọ bụ latex, imepụta ihe nkiri, idobe mmiri, na njikọta. Ọ naghịkwa egbu egbu ma ọ bụ enweghị ụtọ, a na-ejikwa ya nke ọma na ihe owuwu ụlọ, ọgwụ, nri, ákwà, kemịkalụ kwa ụbọchị, nchọpụta mmanụ ala, igwu ala, ime akwụkwọ, ime polymerization, ikuku na ọtụtụ ubi ndị ọzọ. Cellulose ether nwere uru nke itinye ya n'ọtụtụ ebe, ojiji obere nkeji, mmetụta mgbanwe dị mma, na ịdị mma gburugburu ebe obibi. Ọ nwere ike imeziwanye ma melite arụmọrụ ngwaahịa n'ọhịa nke mgbakwunye ya, nke na-enyere aka imeziwanye arụmọrụ ojiji akụrụngwa na uru agbakwunyere ngwaahịa. Ihe mgbakwunye na-adịghị ize ndụ gburugburu ebe obibi dị mkpa n'ọtụtụ ubi.
Dịka ionization nke cellulose ether si dị, ụdị ihe ndị na-agbanwe na ọdịiche dị na mgbaze, enwere ike kewaa cellulose ether n'ime ụdị dị iche iche. Dịka ụdị ihe ndị na-agbanwe na ya si dị, enwere ike kewaa cellulose ethers n'ime otu ethers na ngwakọta ethers. Dịka mgbaze si dị, enwere ike kewaa cellulose ether n'ime ngwaahịa ndị na-agbaze na mmiri na-anaghị agbaze. Dịka ionization si dị, enwere ike kewaa ya n'ime ngwaahịa ionic, non-ionic na ngwakọta. N'etiti cellulose ethers na-agbaze na mmiri, cellulose ethers na-abụghị ionic dị ka HPMC nwere nguzogide okpomọkụ ka mma na nguzogide nnu karịa ionic cellulose ethers (CMC).
Kedu ka cellulose ether si eme ka ụlọ ọrụ ahụ dịkwuo mma?
A na-eji owu a nụchara anụcha emepụta cellulose ether site na iji alkalization, etherification na usoro ndị ọzọ. Usoro mmepụta nke HPMC ọkwa ọgwụ na HPMC ọkwa nri bụ otu ihe ahụ. Ma e jiri ya tụnyere ụlọ cellulose ether ọkwa ihe, usoro mmepụta nke HPMC ọkwa ọgwụ na HPMC ọkwa nri chọrọ etherification usoro, nke dị mgbagwoju anya, siri ike ijikwa usoro mmepụta, ma chọọ ịdị ọcha nke akụrụngwa na gburugburu ebe mmepụta.
Dịka data nke China Cellulose Industry Association nyere si kwuo, ikike mmepụta zuru oke nke ndị na-emepụta cellulose ether na-abụghị ionic nwere nnukwu ikike mmepụta n'ime obodo, dịka Hercules Temple, Shandong Heda, wdg, karịrị 50% nke ikike mmepụta zuru oke nke mba ahụ. E nwere ọtụtụ obere ndị ọzọ na-emepụta cellulose ether na-abụghị ionic nwere ikike mmepụta ihe na-erughị tọn 4,000. E wezụga ụlọ ọrụ ole na ole, ọtụtụ n'ime ha na-emepụta cellulose ethers nkịtị nke ihe owuwu ụlọ, nke nwere ikike mmepụta ihe dị ka tọn 100,000 kwa afọ. N'ihi enweghị ike ego, ọtụtụ obere ụlọ ọrụ anaghị erube isi n'ụkpụrụ nke itinye ego na nchekwa gburugburu ebe obibi na ọgwụgwọ mmiri na ọgwụgwọ gas ikuku iji belata ọnụ ahịa mmepụta. Ka mba ahụ na ọha mmadụ dum na-elebara nchebe gburugburu ebe obibi anya nke ọma, ụlọ ọrụ ndị ahụ na-enweghị ike iru ihe achọrọ maka nchekwa gburugburu ebe obibi ga-akwụsị ma ọ bụ belata mmepụta. N'oge ahụ, ntinye nke ụlọ ọrụ mmepụta cellulose ether nke mba m ga-abawanye.
Amụma nchekwa gburugburu ebe obibi na-aghọwanye ihe siri ike, a na-etinyekwa ihe siri ike maka teknụzụ nchekwa gburugburu ebe obibi na itinye ego na usoro mmepụtacellulose etherUsoro nchekwa gburugburu ebe obibi dị elu na-eme ka ọnụ ahịa mmepụta nke ụlọ ọrụ dịkwuo elu ma na-etolitekwa oke dị elu maka nchekwa gburugburu ebe obibi. A ga-eji nwayọọ nwayọọ mechie ụlọ ọrụ ndị na-enweghị ike iru ihe achọrọ maka nchekwa gburugburu ebe obibi ma ọ bụ belata mmepụta n'ihi enweghị ike iru ihe achọrọ maka nchekwa gburugburu ebe obibi. Dịka akwụkwọ ntuziaka ụlọ ọrụ ahụ si kwuo, ụlọ ọrụ ndị na-ebelata mmepụta nwayọ nwayọ ma kwụsị mmepụta n'ihi ihe ndị metụtara nchekwa gburugburu ebe obibi nwere ike ịgụnye mkpokọta ihe dị ka tọn 30,000 kwa afọ nke cellulose ether nke ihe owuwu nkịtị, nke na-enyere aka ịbawanye ụlọ ọrụ bara uru.
Dabere na cellulose ether, ọ na-aga n'ihu na-agbasa ruo na ngwaahịa ndị dị elu na ndị bara uru.
Oge ozi: Eprel-25-2024