Carboxymethyl cellulose (CMC) na hydroxyethyl cellulose (HEC) bụ ihe abụọ na-emekarị cellulose, nke a na-ejikarị na nri, ọgwụ, ihe ịchọ mma, ihe ụlọ na ubi ndị ọzọ. Ọ bụ ezie na ha abụọ sitere na cellulose eke wee nweta site na mgbanwe kemịkalụ, enwere ọdịiche doro anya na nhazi kemịkalụ, akụrụngwa physicochemical, mpaghara ngwa na mmetụta arụ ọrụ.
1. Chemical Ọdịdị
Isi ihe nhazi nke carboxymethyl cellulose (CMC) bụ na a na-eji otu carboxymethyl (-CH2COOH) dochie otu hydroxyl dị na mkpụrụ ndụ cellulose. Mgbanwe kemịkalụ a na-eme ka CMC na-agbaze mmiri nke ukwuu, ọkachasị na mmiri iji mepụta ngwọta viscous colloidal. Viscosity nke ngwọta ya nwere njikọ chiri anya na ogo nnọchi ya (ya bụ ogo nke nnọchi carboxymethyl).
A na-etolite Hydroxyethyl cellulose (HEC) site na dochie otu hydroxyl na cellulose na hydroxyethyl (-CH2CH2OH). Otu hydroxyethyl na molekul HEC na-eme ka mmiri na-edozi mmiri na hydrophilicity nke cellulose, ma nwee ike ịmepụta gel n'okpuru ọnọdụ ụfọdụ. Ihe owuwu a na-enyere HEC aka igosipụta ịdị mma, nkwusioru na nkwụsi ike na ngwọta mmiri.
2. Njirimara anụ ahụ na nke kemịkal
Solubility mmiri:
Enwere ike ịgbaze CMC kpamkpam na mmiri oyi na mmiri ọkụ iji mepụta ngwọta colloidal transperent ma ọ bụ translucent. Ihe ngwọta ya nwere nnukwu viscosity, na viscosity na-agbanwe na okpomọkụ na pH uru. Enwere ike ịgbaze HEC na mmiri oyi na mmiri ọkụ, ma e jiri ya tụnyere CMC, ọnụego mgbasa ya na-adị nwayọọ ma ọ na-ewe ogologo oge iji mepụta ngwọta otu. Ngwọta viscosity nke HEC dị ntakịrị, mana ọ nwere nguzogide nnu na nkwụsi ike ka mma.
Ndozi viscosity:
A na-emetụta viscosity nke CMC ngwa ngwa site na uru pH. Ọ na-adịkarị elu n'okpuru nnọpụiche ma ọ bụ ọnọdụ alkaline, mana viscosity ga-ebelata nke ukwuu n'okpuru ọnọdụ acid siri ike. Viscosity nke HEC adịghị emetụta uru pH, nwere nnukwu nkwụsi ike nke pH, ọ dịkwa mma maka ngwa n'okpuru ọnọdụ acidic na alkaline dị iche iche.
Nguzogide nnu:
CMC na-enwe mmetụta nke ukwuu na nnu, na ọnụnọ nke nnu ga-ebelata viscosity nke ngwọta ya. N'aka nke ọzọ, HEC na-egosipụta nguzogide nnu siri ike ma ka nwere ike ịnọgide na-enwe mmetụta dị mma na gburugburu ebe nnu dị elu. Ya mere, HEC nwere uru doro anya na usoro nke chọrọ iji nnu mee ihe.
3. Mpaghara ngwa
Ụlọ ọrụ nri:
A na-eji CMC eme ihe n'ọtụtụ ebe na ụlọ ọrụ nri dị ka thickener, stabilizer na emulsifier. Dịka ọmụmaatụ, na ngwaahịa ndị dị ka ice cream, ihe ọṅụṅụ, jams, na sauces, CMC nwere ike imeziwanye uto na nkwụsi ike nke ngwaahịa ahụ. A naghị ejikarị HEC eme ihe na ụlọ ọrụ nri, a na-ejikwa ya na ngwaahịa ụfọdụ nwere ihe pụrụ iche chọrọ, dị ka nri nwere obere kalori na ihe mgbakwunye nri pụrụ iche.
Ọgwụ na ihe ịchọ mma:
A na-ejikarị CMC na-akwadebe mbadamba ụrọ ọgwụ, mmiri mmiri anya, wdg, n'ihi ezigbo ihe ndakọrịta na nchekwa ya. A na-eji HEC eme ihe n'ọtụtụ ebe na ihe ịchọ mma dị ka lotions, creams na shampoos n'ihi ọmarịcha ihe nkiri na-emepụta ihe na-eme ka ọ dị mma, nke nwere ike inye mmetụta dị mma na mmiri mmiri.
Ihe owuwu ụlọ:
N'ime ihe owuwu ụlọ, a pụrụ iji ma CMC na HEC mee ihe dị ka ndị na-ekpo ọkụ na ndị na-ejide mmiri, karịsịa na ciment na ihe ndị dabeere na gypsum. A na-eji HEC eme ihe n'ọtụtụ ebe na ihe owuwu ụlọ n'ihi nkwụsi ike nnu dị mma na nkwụsi ike, nke nwere ike imeziwanye arụmọrụ ihe owuwu na ịdịte aka nke ihe.
Mwepụta mmanụ:
Na mmịpụta mmanụ, CMC, dị ka ihe mgbakwunye maka ịgba mmiri mmiri, nwere ike ịchịkwa viscosity na mmiri mmiri nke apịtị nke ọma. HEC, n'ihi nguzogide nnu ya dị elu na ihe na-eme ka ọ dị elu, aghọwo ihe dị mkpa na kemịkalụ mmanụ mmanụ, nke a na-eji na-egwupụta mmiri na mmiri na-agbaji iji meziwanye arụmọrụ arụmọrụ na uru akụ na ụba.
4. Nchekwa gburugburu ebe obibi na biodegradability
Ma CMC na HEC sitere na cellulose eke ma nwee ezigbo biodegradability na enyi na gburugburu ebe obibi. Na gburugburu ebe obibi, microorganisms nwere ike imebi ha ka ha mepụta ihe ndị na-adịghị emerụ ahụ dị ka carbon dioxide na mmiri, na-ebelata mmetọ na gburugburu ebe obibi. Na mgbakwunye, n'ihi na ha anaghị egbu egbu na ndị na-adịghị emerụ ahụ, a na-ejikarị ha eme ihe na ngwaahịa ndị na-abanye na ahụ mmadụ kpọmkwem, dị ka nri, ọgwụ na ihe ịchọ mma.
Ọ bụ ezie na carboxymethyl cellulose (CMC) na hydroxyethyl cellulose (HEC) bụ ma mmepụta nke cellulose, ha nwere ịrịba iche na chemical Ọdịdị, physicochemical Njirimara, ngwa ubi na ọtọ mmetụta. A na-eji CMC eme ihe n'ọtụtụ ebe na nri, ọgwụ, mmịpụta mmanụ na mpaghara ndị ọzọ n'ihi nnukwu viscosity ya na ike ya na mmetụta gburugburu ebe obibi. Otú ọ dị, HEC na-ejikarị eme ihe na ihe ịchọ mma, ihe ụlọ, wdg n'ihi nkwụsi ike nnu ya dị mma, nkwụsi ike na ihe ndị na-emepụta ihe nkiri. Mgbe ị na-ahọrọ iji ya, ọ dị mkpa ịhọrọ ihe nrụpụta cellulose kachasị mma dị ka ihe dị na ngwa ngwa si dị na mkpa iji nweta mmetụta kachasị mma.
Oge nzipu: Ọgọst-21-2024