Ethers cellulose gbanwetụrụ bụ ìgwè kemịkalụ dị iche iche nke sitere na cellulose, polymer eke dị na mgbidi cell osisi. Cellulose bụ polymer yinye linear nke mejupụtara nkeji glucose jikọtara ọnụ site na njikọ β-1,4-glycosidic. Ọ bụ polymer eke kachasị ukwuu n'ụwa ma nwee ọtụtụ ihe bara uru dị ka ike dị elu, njupụta dị ala, biodegradability, na mmeghari ohuru.
A na-etolite ethers cellulose a gbanwere site n'iwebata otu kemịkalụ dị iche iche n'ime molekul cellulose, nke na-agbanwe njirimara anụ ahụ na nke kemịkal ya. Enwere ike ime mgbanwe a site n'ọtụtụ ụzọ, gụnyere etherification, esterification, na oxidation. Ihe ethers cellulose emezigharịrị nwere ọtụtụ ngwa na ụlọ ọrụ dị iche iche, gụnyere nri, ọgwụ, ihe ịchọ mma, ihe owuwu, na akwa.
Otu ụdị cellulose ether a na-ahụkarị bụ methyl cellulose (MC), nke a na-etolite site na iji methyl chloride meghachi omume cellulose. MC bụ ihe na-abụghị ionic, polymer soluble mmiri nke a na-ejikarị eme ihe dị ka ihe na-eme ka ọ dị arọ na nri, dị ka ihe nkedo na ceramik, yana dịka mkpuchi na-emepụta akwụkwọ. MC nwere ọtụtụ uru karịa ndị ọzọ thickeners, dị ka ike ya na-etolite transperent gels, ya ala toxicity, na ya iguzogide enzyme mmebi.
Ụdị cellulose ether ọzọ gbanwetụrụ bụ hydroxypropyl methyl cellulose (HPMC), nke a na-emepụta site n'imeghachi cellulose na ngwakọta nke propylene oxide na methyl chloride. HPMC bụ ihe na-abụghị ionic, mmiri-soluble polima nke a na-ejikarị dị ka ihe na-eme ka ọ dị arọ na nri na ngwaahịa nlekọta onwe onye, dị ka ihe nkpuchi na mbadamba ọgwụ, yana dịka mkpuchi na ụlọ ọrụ mmepụta ihe. HPMC nwere ọtụtụ uru karịa ndị ọzọ thickeners, dị ka ike ya na-etolite ike gels na ala ịta, ya elu viscosity na ala okpomọkụ, na ya ndakọrịta na a dịgasị iche iche nke ọzọ Efrata.
Carboxymethyl cellulose (CMC) bụ ụdị ọzọ ether cellulose gbanwetụrụ nke na-etolite site na iji monochloroacetic acid meghachi omume cellulose. CMC bụ polymer soluble mmiri nke a na-ejikarị dị ka ihe na-eme ka ọ sie ike, stabilizer, na emulsifier na nri, ọgwụ na ngwaahịa nlekọta onwe onye. CMC nwere ọtụtụ uru karịa ndị ọzọ thickeners, dị ka ike ya na-emepụta transperent gels, ya elu mmiri na-ejide ike, na ya iguzogide enzyme mebiri emebi.
Ethyl cellulose (EC) bụ ụdị ether cellulose gbanwetụrụ nke a na-etolite site na imeghachi cellulose na ethyl chloride. EC bụ ihe na-abụghị ionic, mmiri na-adịghị edozi mmiri nke a na-ejikarị eme ihe dị ka ihe mkpuchi na ụlọ ọrụ ọgwụ. EC nwere ọtụtụ uru karịa mkpuchi ndị ọzọ, dị ka ike ya ịmepụta ihe nkiri na-aga n'ihu, obere viscosity ya, na iguzogide mmiri na okpomọkụ.
Hydroxyethyl cellulose (HEC) bụ ụdị ọzọ ether cellulose gbanwetụrụ nke na-etolite site na iji ethylene oxide meghachi omume cellulose. HEC bụ polymer soluble mmiri nke a na-ejikarị dị ka ihe na-eme ka ọ dị arọ na ngwaahịa nlekọta onwe ya yana dị ka ihe na-ekekọta na mbadamba ọgwụ. HEC nwere ọtụtụ uru karịa ihe ndị ọzọ na-agba agba, dị ka ike ya ịmepụta gels transperent, ikike ijide mmiri dị elu, yana ndakọrịta ya na ọtụtụ ihe ndị ọzọ.
Njirimara na ngwa nke cellulose ethers gbanwetụrụ na-adabere n'ọtụtụ ihe, dị ka ụdị nke otu kemịkal ewepụtara, ogo nke nnọchi, ịdị arọ molekụla, na solubility. Dịka ọmụmaatụ, ịbawanye ogo nke nnọchi nke MC ma ọ bụ HPMC nwere ike ịbawanye ikike ijide mmiri na viscosity ha, ebe ha na-ebelata solubility ha. N'otu aka ahụ, ịba ụba nke molekụla CMC nwere ike ịbawanye viscosity ya na ikike ịmepụta gels, ebe ọ na-ebelata ikike ijide mmiri.
Ngwa nke ether cellulose gbanwetụrụ dị ọtụtụ ma dị iche iche. N'ụlọ ọrụ nri, a na-eji ha eme ihe dị ka ihe na-eme ka ihe na-akpụ akpụ, stabilizers, na emulsifiers n'ọtụtụ ngwaahịa, gụnyere ofe, sauces, uwe na desserts. A na-ejikwa ethers cellulose emezigharị eme ihe na mmepụta nke obere abụba na nri ndị nwere obere kalori, n'ihi na ha nwere ike iṅomi ọdịdị na ọnụ nke abụba na-agbakwunyeghị calorie. Na mgbakwunye, a na-eji ha dị ka mkpuchi na glazes na ngwaahịa confectionery iji meziwanye ọdịdị ha na ndụ ha.
Na ụlọ ọrụ na-emepụta ọgwụ, a na-eji ethers cellulose emezigharị eme ihe dị ka ndị na-ekekọta, ndị na-agbasa, na mkpuchi na mbadamba na capsules. A na-ejikwa ha dị ka viscosity modifiers n'ụdị mmiri mmiri, dị ka sirop na nkwusioru. A na-ahọrọ ethers cellulose emezigharịrị karịa ihe ndị ọzọ na-enye aka, n'ihi na ha adịghị adị, na-adaba adaba, ma nwee obere nsi. Ha na-enyekwa ọkwa dị elu nke njikwa ntọhapụ nke ọgwụ ọjọọ, nke nwere ike imeziwanye arụmọrụ na nchekwa ha.
N'ụlọ ọrụ ịchọ mma, a na-eji ethers cellulose emezigharịrị eme ihe dị ka ndị na-ekpu mmiri, emulsifiers, na stabilizers na ude, lotions, na gels. A na-ejikwa ha dị ka ihe na-emepụta ihe nkiri na ngwaahịa nlekọta ntutu isi, dị ka shampoos na conditioners. Ethers cellulose gbanwere nwere ike imeziwanye ọdịdị na ọdịdị nke ngwaahịa ịchọ mma, yana ịkwalite nrụpụta na nkwụsi ike ha.
N'ebe a na-ewu ihe owuwu, a na-eji ethers cellulose emezigharịrị eme ihe dị ka ihe na-esi ísì, ihe nkedo, na ihe na-ejigide mmiri na ciment, ngwa ngwa, na plasta. Ha nwere ike imeziwanye arụmọrụ, nkwụsi ike, na ike nke ihe ndị a, yana ibelata mbelata na mgbawa ha. A na-ejikwa ethers cellulose emezigharị mee ihe dị ka mkpuchi na nrapado na mkpuchi mgbidi na ala ala.
N'ime ụlọ ọrụ textiles, a na-eji ethers cellulose gbanwetụrụ dị ka ihe na-emepụta ihe na-emepụta akwa na yarns. Ha nwere ike melite njikwa na ịkwa ákwà nke textiles, yana ịkwalite ike na ịdịte aka ha.
N'ozuzu, cellulose ethers gbanwetụrụ bụ ihe bara uru na ogige bara uru nke nwere ọtụtụ ngwa na ụlọ ọrụ dị iche iche. Ha na-enye ọtụtụ uru karịa ndị polymers ndị ọzọ, dị ka bioocompatibility ha, biodegradaability na ọdịdị mmeghari ohuru. Ha na-enyekwa ọkwa dị elu nke njikwa anụ ahụ na kemịkal nke ngwaahịa, nke nwere ike imeziwanye ogo na arụmọrụ ha. Dị ka ndị dị otú ahụ, ethers cellulose gbanwetụrụ nwere ike ịnọgide na-arụ ọrụ dị mkpa na mmepe nke ngwaahịa ọhụrụ na nke ọhụrụ n'ọdịnihu.
Oge nzipu: Eprel-22-2023