A na-enweta Carboxymethyl cellulose (CMC) mgbe carboxymethylation nke cellulose gasịrị. Ngwọta mmiri ya nwere ọrụ nke ndim, imepụta ihe nkiri, njikọ, njigide mmiri, nchebe colloid, emulsification na nkwusioru, a na-ejikwa ya na mmanụ ala, nri, ọgwụ, wdg, ụlọ ọrụ textile na akwụkwọ, bụ otu n'ime ihe kachasị mkpa. cellulose ethers.Natural cellulose bụ nke a na-ekesa na ọtụtụ polysaccharide na okike, na isi mmalite ya bara ụba nke ukwuu. Nkà na ụzụ mgbanwe nke cellulose dị ugbu a na-elekwasị anya na etherification na esterification. Carboxymethylation bụ ụdị teknụzụ etherification.
Njirimara anụ ahụ
Sodium carboxymethyl cellulose (CMC) bụ anionic cellulose ether, na-acha ọcha ma ọ bụ ubé odo flocculent eriri ntụ ntụ ma ọ bụ na-acha ọcha ntụ ntụ ọdịdị, isi, enweghị ụtọ, na-adịghị egbu egbu; mfe soluble na mmiri oyi ma ọ bụ mmiri ọkụ, akpụ a ụfọdụ viscosity doro anya ngwọta. Ihe ngwọta na-anọpụ iche ma ọ bụ obere alkaline, na-adịghị edozi na ethanol, ether, isopropanol, acetone na ihe ndị ọzọ na-edozi ahụ, soluble na 60% mmiri nwere ethanol ma ọ bụ acetone ngwọta. Ọ bụ hygroscopic, kwụsiri ike na ìhè na okpomọkụ, viscosity na-ebelata na mmụba nke okpomọkụ, ihe ngwọta kwụsiri ike na pH 2-10, pH dị ala karịa 2, enwere mmiri ozuzo siri ike, na viscosity na-ebelata mgbe pH dị elu karịa 10. The discoloration okpomọkụ bụ 227 ℃, carbonization okpomọkụ bụ 252 ℃, na elu esemokwu nke 2% aqueous ngwọta bụ. 71mn/n.
chemical Njirimara
A na-akwado ya site na mkpụrụ ndụ cellulose nke ihe nnọchi carboxymethyl, na-emeso cellulose na sodium hydroxide iji mepụta alkali cellulose, wee meghachi omume na monochloroacetic acid. Ngalaba glucose nke mejupụtara cellulose nwere otu hydroxyl 3 nke enwere ike dochie ya, yabụ enwere ike nweta ngwaahịa nwere ogo dị iche iche. Ná nkezi, 1 mmol nke carboxymethyl ka ewepụtara kwa 1 g nke arọ akọrọ, nke na-esighi ike na mmiri na itughari acid, mana enwere ike ịzacha ma jiri ya mee ihe maka ion mgbanwe chromatography. Carboxymethyl pKa bụ ihe dịka 4 na mmiri dị ọcha yana ihe dịka 3.5 na 0.5mol/L NaCl. Ọ bụ onye na-agbanwe cation acid na-adịghị ike ma na-ejikarị eme ihe maka nkewa nke na-anọpụ iche na protein ndị bụ isi na pH> 4. Ihe karịrị 40% nke hydroxyl dị iche iche na-eji otu carboxymethyl dochie anya, nke enwere ike ịgbaze n'ime mmiri iji mepụta ngwọta colloidal elu-viscosity kwụsiri ike.
Ebumnuche bụ isi
Carboxymethyl cellulose (CMC) bụ ihe na-adịghị egbu egbu na-esi ísì ụtọ na-acha ọcha flocculent ntụ ntụ na-arụ ọrụ kwụsiri ike na ọ na-adị mfe soluble na mmiri. Ihe ngwọta ya bụ mmiri mmiri na-anọpụ iche ma ọ bụ alkaline transperent viscous mmiri, soluble na ndị ọzọ mmiri-soluble glues na resins, na-apụghị soluble. na organic mgbaze dị ka ethanol. Enwere ike iji CMC mee ihe dị ka nrapado, thickener, onye na-akwụsị akwụsị, emulsifier, dispersant, stabilizer, sizing agent, wdg.
Sodium carboxymethyl cellulose (CMC) bụ ngwaahịa nwere nnukwu mmepụta, nke a na-ejikarị na nke kachasị mma n'etiti cellulose ethers, nke a na-akpọkarị "monosodium glutamate ụlọ ọrụ".
1. A na-eji ya arụ ọrụ mmanụ na gas, igwu mmiri na ọrụ ndị ọzọ
① Apịtị nwere CMC nwere ike ime ka mgbidi olulu mmiri na-etolite achicha dị nro na nke siri ike na obere permeability, nke na-ebelata mmiri mmiri.
② Mgbe agbakwunyere CMC na apịtị ahụ, onye na-egwupụta ihe nwere ike nweta ike mmalite dị ala, nke mere na apịtị ahụ nwere ike ịhapụ gas a na-etinye n'ime ya ngwa ngwa, ma n'otu oge ahụ, a na-atụfu ihe mkpofu ngwa ngwa na olulu apịtị.
③ Ịkụ ala apịtị, dị ka mgbasa nkwusioru ndị ọzọ, nwere oge ịdị adị, yana mgbakwunye CMC nwere ike ime ka ọ kwụsie ike ma gbatịa oge ịdị adị.
④ Apịtị nwere CMC anaghị emetụta ebu, n'ihi ya, ọ dịghị mkpa idobe uru pH dị elu ma jiri ihe nchekwa.
⑤ Nwere CMC dị ka onye na-ahụ maka ọgwụgwọ mmiri na-asa ụrọ, nke nwere ike iguzogide mmetọ nke nnu dị iche iche soluble.
⑥ The apịtị nwere CMC nwere ezigbo nkwụsi ike na ike ibelata mmiri ọnwụ ọbụna ma ọ bụrụ na okpomọkụ dị n'elu 150 ℃.
CMC nwere viscosity dị elu na ọkwa dị elu nke nnọchi dị mma maka apịtị nwere obere njupụta, yana CMC nwere viscosity dị ala na ọkwa dị elu nke nnọchi kwesịrị ekwesị maka apịtị nwere oke njupụta. Nhọrọ nke CMC kwesịrị ikpebi dịka ọnọdụ dị iche iche dị ka ụdị apịtị, mpaghara na omimi miri emi.
2. Ejiri ya na textile, mbipụta na akwa akwa. Ụlọ ọrụ textile na-eji CMC dị ka onye na-emepụta ihe na-emepụta ihe na-egbuke egbuke nke owu, ajị anụ silk, eriri kemịkal, ngwakọta na ihe ndị ọzọ siri ike;
3. Eji akwụkwọ ụlọ ọrụ CMC nwere ike iji dị ka akwụkwọ n'elu smoothing gị n'ụlọnga na sizing gị n'ụlọnga na akwụkwọ ụlọ ọrụ. Ịtinye 0.1% na 0.3% CMC na pulp nwere ike ime ka ike nkwụsị nke akwụkwọ ahụ dịkwuo elu site na 40% ruo 50%, mee ka nkwụsịtụ nke mgbagwoju anya site na 50%, ma mụbaa kneadability site na 4 ruo 5 ugboro.
4. Enwere ike iji CMC mee ihe dị ka ihe mgbasa ozi unyi mgbe agbakwunyere na ihe ndị na-emepụta ihe; A na-eji kemịkalụ kwa ụbọchị dị ka ụlọ ọrụ ntacha eze CMC glycerin aqueous solution dị ka isi chịngọm maka ntacha eze; a na-eji ụlọ ọrụ na-emepụta ọgwụ eme ihe dị ka ihe na-esi ísì na emulsifier; A na-agbaze mmiri mmiri CMC ma jiri ya mee ihe maka nhazi ịnweta n'elu mmiri, wdg.
5. N'ime ụlọ ọrụ seramiiki, enwere ike iji ya dị ka ihe ntanye, plasticizer, onye na-akwụsịtụ maka glaze, onye na-edozi agba, wdg.
6. A na-eji ihe owuwu mee ihe iji meziwanye njide mmiri na ike
7. A na-eji ya na ụlọ ọrụ nri. The nri ụlọ ọrụ na-eji CMC na elu nnọchi ogo dị ka a thickener maka ice cream, mkpọ nri, ngwa ngwa-esi nri noodles, na a ụfụfụ stabilizer maka biya, wdg N'ihi thickeners, binders ma ọ bụ excipients.
8. Ụlọ ọrụ na-emepụta ọgwụ na-ahọrọ CMC na viscosity kwesịrị ekwesị dị ka onye na-ekekọta mbadamba ihe, nkwụsịtụ, na onye nkwụsịtụ maka nkwụsịtụ.
Oge nzipu: Nov-03-2022