Kedu ihe bụ sodium carboxymethylcellulose?

sodium carboxymethylcellulose(CMC) bụ anonic cellulose ether. Ọdịdị ya na-acha ọcha ma ọ bụ ubé odo flocculent eriri ntụ ntụ ma ọ bụ na-acha ọcha ntụ ntụ, adịghị isi, enweghị ụtọ, na-adịghị egbu egbu; ọ dị mfe soluble na oyi ma ọ bụ mmiri ọkụ na-etolite a ụfọdụ viscosity. uzo 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, ma soluble na 60% ethanol ma ọ bụ acetone ngwọta. Ọ bụ hygroscopic ma kwụsie ike na ìhè na okpomọkụ. Viscosity na-ebelata na mmụba nke okpomọkụ. Ngwọta ahụ kwụsiri ike na pH 2-10. Mgbe pH dị ala karịa 2, a na-ebuli ihe siri ike. Mgbe pH dị elu karịa 10, viscosity na-ebelata. The discoloration okpomọkụ bụ 227°C, carbonization okpomọkụ bụ 252°C, na elu esemokwu nke 2% aqueous ngwọta bụ 71mn/n.

chemical Njirimara

A na-enweta ya site n'ịgwọ cellulose na carboxymethyl substituents, na-emeso cellulose na sodium hydroxide na-etolite alkali cellulose, na mgbe ahụ meghachi omume na monochloroacetic acid. Ngalaba glucose nke mejupụtara cellulose nwere otu hydroxyl atọ nwere ike dochie ya, yabụ enwere ike nweta ngwaahịa nwere ogo dị iche iche nke nnọchi. Na nkezi, 1 mmol nke otu carboxymethyl kwa 1g nke ịdị arọ kpọrọ nkụ bụ ihe a na-adịghị ahụkebe na mmiri na itughari acid, mana enwere ike ịza ya ma jiri ya mee ihe maka chromatography mgbanwe ion. 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

Carboxymethylcellulose (CMC) bụ ihe na-adịghị egbu egbu, ntụ ntụ na-acha ọcha na-esi ísì ụtọ na-arụ ọrụ siri ike ma na-agbaze ngwa ngwa 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 onye na-ekekọta, thickener, onye nkwusioru, emulsifier, dispersant, stabilizer, onye na-ahụ maka nha, wdg.

Sodium carboxymethyl cellulose (CMC) bụ ngwaahịa nwere nnukwu mmepụta, ụdị ojiji kachasị na ojiji kachasị adaba n'etiti cellulose ethers, nke a na-akpọkarị "monosodium glutamate ụlọ ọrụ".

1. A na-eji mmanụ na gas na-egwupụta ihe, igwu mmiri na ọrụ ndị ọzọ

① CMC nwere apịtị nwere ike ime ka mgbidi nke ọma na-etolite achicha dị nro na nke siri ike na obere permeability, na-ebelata mmiri na-efu.

② Mgbe agbakwunyere CMC na apịtị ahụ, onye na-egwupụta ihe nwere ike ịnweta ike mbido mbụ 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 ga-atụfu ihe mkpofu ngwa ngwa na olulu apịtị.

③ Ịkụ ala apịtị, dị ka nkwusioru na mgbasa ndị ọzọ, nwere ụfọdụ ndụ nchekwa. Ịgbakwunye CMC nwere ike ime ka ọ kwụsie ike ma mee ka ndụ dị ogologo.

④ CMC-nwere apịtị na-adịghị emetụta ebu, n'ihi ya, ọ dịghị mkpa ịnọgide na-enwe elu pH uru na-eji preservatives.

⑤ Nwere CMC dị ka onye na-ahụ maka ọgwụgwọ maka igwu mmiri na-asọpụta apịtị, nke nwere ike iguzogide mmetọ nke nnu dị iche iche soluble.

⑥ CMC-nwere apịtị nwere ezigbo nkwụsi ike na ike ibelata mmiri ọnwụ ọbụna ma ọ bụrụ na okpomọkụ dị n'elu 150°C.

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 nke ọma.

2. A na-eji akwa akwa, ibipụta na akwa akwa. N'ime ụlọ ọrụ textile, a na-eji CMC mee ihe dị ka onye na-emepụta ihe maka ntanye ọkụ nke owu, ajị anụ silk, eriri kemịkal, ngwakọta na ihe ndị ọzọ siri ike;

3. Ejiri ya na ụlọ ọrụ akwụkwọ CMC nwere ike iji ya mee ihe dị ka onye na-eme ka ọ dị nro na onye na-emepụta ihe na ụlọ ọrụ akwụkwọ. Ịtinye 0.1% na 0.3% nke CMC na pulp nwere ike ime ka ike nkwụsị nke akwụkwọ ahụ dịkwuo elu site na 40% ruo 50%, mee ka nkwụsị mgbawa site na 50%, ma mee ka ihe nkedo ahụ dịkwuo 4 ruo 5 ugboro.

4. Enwere ike iji CMC mee ihe dị ka ihe mgbasa ozi unyi mgbe agbakwunyere na ihe eji eme ihe; a na-eji kemịkalụ kwa ụbọchị dị ka ụlọ ọrụ ntacha eze CMC glycerol aqueous solution ka a na-eji isi ihe nkpuchi eze; a na-eji ụlọ ọrụ na-emepụta ọgwụ eme ihe dị ka ihe na-esi ísì na emulsifier; A na-eji ngwọta mmiri CMC mee ihe dị ka mmiri na-ese n'elu mgbe ọ gbasasịrị Ngwuputa na ihe ndị ọzọ.

5. Enwere ike iji ya mee ihe dị ka nrapado, plasticizer, onye na-egbochi glaze, onye na-edozi agba, wdg na ụlọ ọrụ seramiiki.

6. A na-eji ihe owuwu mee ihe iji meziwanye njide mmiri na ike

7. Ejiri ya na ụlọ ọrụ nri. Ụlọ ọrụ nri na-eji CMC nwere nnukwu ngbanwe dị ka ihe na-esi ísì ụtọ maka ice cream, nri mkpọ, noodles ozugbo, na ihe nkwụnye ụfụfụ maka biya. Maka thickeners, ihe nkedo ma ọ bụ conformal agents.

8. Ụlọ ọrụ na-emepụta ọgwụ na-ahọrọ CMC na viscosity kwesịrị ekwesị dị ka onye na-ekekọta, onye na-ekesa mbadamba nkume, na onye na-akwụsịtụ ihe nkwụsịtụ, wdg.