A na-enweta Carboxymethyl cellulose (CMC) mgbe a gbasasịrị cellulose. Mmiri mmiri ya nwere ọrụ nke ịka nká, ịmepụta ihe nkiri, ijikọ, idobe mmiri, nchedo colloid, emulsification na nkwụsịtụ, a na-ejikwa ya nke ọma na ụlọ ọrụ mmanụ ala, nri, ọgwụ, wdg., ụlọ ọrụ ákwà na akwụkwọ, bụ otu n'ime ihe ndị kacha mkpa na cellulose ethers. Cellulose eke bụ polysaccharide kachasị kesaa ma baa ụba n'okike, isi mmalite ya dịkwa oke mma. Teknụzụ mgbanwe cellulose nke ugbu a na-elekwasị anya na etherification na esterification. Carboxymethylation bụ ụdị teknụzụ etherification.
ihe onwunwe anụ ahụ
Sodium carboxymethyl cellulose (CMC) bụ anionic cellulose ether, nke nwere ntụ ntụ eriri ọcha ma ọ bụ odo odo dị ka flocculent ma ọ bụ ntụ ntụ ọcha, ọ naghị esi isi, ọ naghị atọ ụtọ, ọ naghị egbu egbu; ọ na-agbaze ngwa ngwa na mmiri oyi ma ọ bụ mmiri ọkụ, na-emepụta mmiri doro anya. Ngwọta ahụ bụ nke na-anọpụ iche ma ọ bụ obere alkaline, ọ naghị agbaze na ethanol, ether, isopropanol, acetone na ihe ndị ọzọ na-agbaze organic, ọ na-agbaze na ethanol ma ọ bụ acetone mmiri nwere 60%. Ọ na-adị hygroscopic, ọ na-adịgide adịgide na ìhè na okpomọkụ, viscosity na-ebelata ka okpomọkụ na-abawanye, ngwọta ahụ kwụsiri ike na pH 2-10, pH dị ala karịa 2, enwere mmiri ozuzo siri ike, viscosity na-ebelatakwa mgbe pH dị elu karịa 10. Okpomọkụ mgbanwe agba bụ 227℃, okpomọkụ carbonization bụ 252℃, nrụgide elu nke mmiri mmiri 2% bụ 71mn/n.
Njirimara kemịkalụ
A na-esi na ihe ndị sitere na cellulose nke carboxymethyl substituents kwadebe ya, na-agwọ cellulose na sodium hydroxide iji mepụta alkali cellulose, wee meghachi omume na monochloroacetic acid. Nkeji glucose nke mejupụtara cellulose nwere otu hydroxyl atọ enwere ike dochie, yabụ enwere ike nweta ngwaahịa nwere ọkwa dị iche iche nke nnọchi. Na nkezi, e webatara 1 mmol nke carboxymethyl kwa 1 g nke ibu akọrọ, nke anaghị agbaze na mmiri na acid diluted, mana enwere ike ịmịcha ma jiri ya mee chromatography mgbanwe ion. Carboxymethyl pKa dị ihe dị ka 4 na mmiri dị ọcha na ihe dị ka 3.5 na 0.5mol/L NaCl. Ọ bụ ihe mgbanwe cation na-adịghị ike acidic ma a na-ejikarị ya eme ihe maka nkewa nke protein na-anọpụ iche na nke bụ isi na pH>4. Ihe karịrị 40% nke otu hydroxyl ka ejiri carboxymethyl groups dochie, nke enwere ike ịgbaze na mmiri iji mepụta ngwọta colloidal siri ike.
Isi ihe mere e ji mee ya
Carboxymethyl cellulose (CMC) bụ ntụ ntụ ọcha na-anaghị egbu egbu ma na-enweghị isi, ọ na-arụkwa ọrụ siri ike, ọ na-agbazekwa ngwa ngwa n'ime mmiri. Mmiri mmiri ya bụ mmiri viscous na-anọpụ iche ma ọ bụ alkaline, nke a na-agbaze na gluu na resin ndị ọzọ na-agbaze na mmiri, ọ naghịkwa agbaze na ihe ndị na-agbaze na organic dịka ethanol. Enwere ike iji CMC mee ihe dị ka ihe na-arapara, ihe na-eme ka ihe sie ike, ihe na-eme ka ihe dị nro ... wdg.
Sodium carboxymethyl cellulose (CMC) bụ ngwaahịa nwere mmepụta kachasị ukwuu, nke a na-ejikarị eme ihe na nke kachasị mma n'etiti cellulose ethers, nke a na-akpọkarị "monosodium glutamate industrial".
1. A na-eji ya eme ihe maka igwu mmanụ na gas eke, igwu olulu mmiri na ọrụ ndị ọzọ.
① Apịtị nwere CMC nwere ike ime ka mgbidi olulu mmiri ahụ bụrụ achịcha nzacha dị gịrịgịrị ma sie ike nke na-enweghị ike ime ihe ọ bụla, nke na-ebelata mfu mmiri.
② Mgbe etinyere CMC na apịtị ahụ, igwe ịgba ihe nwere ike nweta obere ike ịkpụcha mbụ, ka apịtị ahụ wee nwee ike ịhapụ gas e kechiri n'ime ya ngwa ngwa, n'otu oge ahụ, a na-atụfu ihe ndị ahụ ngwa ngwa n'ime olulu apịtị ahụ.
③Apịtị igwu ala, dịka mgbasa ndị ọzọ nke nkwusioru, nwere oge ụfọdụ nke ịdị adị, mgbakwunye nke CMC nwere ike ime ka ọ kwụsie ike ma mee ka oge ịdị adị dịkwuo ogologo.
④ Apịtị nwere CMC anaghị emetụta ebu nke ukwuu, yabụ ọ dịghị mkpa ịnọgide na-enwe uru pH dị elu ma jiri ihe nchekwa.
⑤ Nwere CMC dị ka ihe na-eme ka mmiri saa ájá, nke nwere ike iguzogide mmetọ nke nnu dị iche iche na-agbaze.
⑥ Apịtị nwere CMC nwere ezigbo nkwụsi ike ma nwee ike ibelata mfu mmiri ọbụlagodi na okpomọkụ dị n'elu 150℃.
CMC nwere oke viscosity na oke resistivity dị mma maka apịtị nwere obere njupụta, CMC nwere obere viscosity na oke resistivity dị mma maka apịtị nwere oke njupụta. A ga-ekpebi nhọrọ nke CMC dabere na ọnọdụ dị iche iche dịka ụdị apịtị, mpaghara na omimi olulu mmiri.
2. A na-eji ya eme ihe n'ụlọ ọrụ ákwà, ibipụta akwụkwọ na ịgba agba. Ụlọ ọrụ ákwà na-eji CMC eme ihe maka nha ákwà dị mfe nke owu, ajị anụ silk, eriri kemịkalụ, agwakọtara na ihe ndị ọzọ siri ike;
3. A na-eji CMC eme ihe n'ụlọ ọrụ akwụkwọ. A na-eji ya eme ihe dị ka ihe na-eme ka elu akwụkwọ dị nro ma na-eme nha nha n'ụlọ ọrụ akwụkwọ. Ịtinye 0.1% ruo 0.3% CMC na pulp nwere ike ime ka ike nrụgide nke akwụkwọ ahụ dịkwuo elu site na 40% ruo 50%, mee ka mgbawa nrụgide dịkwuo elu site na 50%, ma mee ka ike ịkpụkọta ya dịkwuo elu ugboro anọ ruo ise.
4. Enwere ike iji CMC mee ihe dị ka ihe na-amịkọrọ unyi mgbe etinyere ya na ihe e ji asa ezé; kemịkalụ kwa ụbọchị dịka ụlọ ọrụ ihe e ji asa ezé eme ihe. A na-eji ihe e ji asa ezé eme ihe dị ka ihe e ji asa ezé eme ihe dị ka ihe e ji asa ezé eme ihe; a na-eji ụlọ ọrụ ọgwụ eme ihe dị ka ihe na-eme ka ọ dị arọ ma na-eme ka ọ dị nro; a na-eme ka ihe e ji asa ezé mee ka ọ dị arọ ma jiri ya mee ihe maka nhazi mineral, wdg.
5. N'ụlọ ọrụ seramiiki, enwere ike iji ya dị ka ihe na-eme ka ọ dị nro, ihe na-eme ka ọ dị nro, ihe na-eme ka ọ dị nro maka ihe na-eme ka agba dị nro, wdg.
6. E ji ya rụọ ọrụ iji melite njide mmiri na ike ya
7. A na-eji ya eme ihe n'ụlọ ọrụ nri. Ụlọ ọrụ nri na-eji CMC nwere ọkwa dị elu nke nnọchi anya dị ka ihe na-eme ka ọ dị arọ maka ice cream, nri mkpọ, nri a na-esi ngwa ngwa, na ihe na-eme ka ụfụfụ sie ike maka biya, wdg. Maka ihe na-eme ka ọ dị arọ, ihe na-ejikọ ma ọ bụ ihe na-enye aka.
8. Ụlọ ọrụ ọgwụ na-ahọrọ CMC nwere ike ịcha ahụ kwesịrị ekwesị dị ka ihe na-ejikọ mbadamba, ihe na-emebi emebi, na ihe na-egbochi nkwụsịtụ maka nkwụsịtụ.
Oge ozi: Nọvemba-03-2022