Methylcellulose (MC) na carboxymethylcellulose (CMC) bụ ihe abụọ na-emekarị cellulose, nke a na-ejikarị na nri, ọgwụ, ihe owuwu, ụlọ ọrụ kemịkalụ na mpaghara ndị ọzọ. Ọ bụ ezie na a na-emezigharị ha niile site na cellulose eke, enwere nnukwu ọdịiche dị na nhazi kemịkal, ihe anụ ahụ na kemịkal, na ngwa.
1. Usoro nhazi na usoro nkwadebe
A na-emepụta Methylcellulose site na imeghachi cellulose na methyl chloride (ma ọ bụ methanol) n'okpuru ọnọdụ alkaline. N'oge usoro a, akụkụ nke hydroxyl otu (-OH) na cellulose molecules na-anọchi methoxy otu (-OCH₃) na-etolite methylcellulose. Ogo nke nnọchi (DS, ọnụọgụ ndị nnọchi kwa nkeji glucose) nke methylcellulose na-ekpebi njirimara anụ ahụ na kemịkal ya, dị ka solubility na viscosity.
A na-emepụta Carboxymethylcellulose site na mmeghachi omume cellulose na chloroacetic acid n'okpuru ọnọdụ alkaline, na-eji carboxymethyl (-CH₂COOH) dochie ìgwè hydroxyl. Ogo nke nnọchi na ogo nke polymerization (DP) nke CMC na-emetụta solubility ya na viscosity na mmiri. CMC na-adịkarị n'ụdị nnu sodium, nke a na-akpọ sodium carboxymethylcellulose (NaCMC).
2. Njirimara anụ ahụ na nke kemịkal
Solubility: Methylcellulose na-agbaze na mmiri oyi, mana ọ na-efunahụ solubility wee mepụta gel na mmiri ọkụ. Mgbanwe nke okpomọkụ a na-enyere aka iji ya mee ihe dị ka onye na-agba ume na gelling na nhazi nri. CMC bụ soluble na ma oyi na mmiri ọkụ, ma viscosity nke ngwọta ya na-ebelata ka okpomọkụ na-abawanye.
Viscosity: A na-emetụta viscosity nke abụọ site na ogo nnọchi na ntinye ngwọta. Viscosity nke MC na-ebu ụzọ na-abawanye wee na-ebelata ka okpomọkụ na-abawanye, ebe viscosity nke CMC na-ebelata ka okpomọkụ na-abawanye. Nke a na-enye ha uru nke ha na ngwa ụlọ ọrụ dị iche iche.
Nkwụsi ike pH: CMC na-anọgide na-eguzosi ike n'elu pH dị iche iche, karịsịa n'okpuru ọnọdụ alkaline, nke na-eme ka ọ bụrụ ihe a ma ama dị ka ihe na-eme ka ọ dịkwuo elu na nri na ọgwụ. MC kwụsiri ike n'okpuru ọnọdụ nnọpụiche yana ntakịrị alkaline, mana ọ ga-agbada na acid siri ike ma ọ bụ alkalis.
3. Mpaghara ngwa
Ụlọ ọrụ nri: Methylcellulose bụ nke a na-ejikarị eme ihe na nri dị ka ihe na-agbapụta, emulsifier na stabilizer. Dịka ọmụmaatụ, ọ nwere ike iṅomi uto na udidi nke abụba mgbe ọ na-emepụta nri ndị nwere obere abụba. A na-eji Carboxymethylcellulose eme ihe n'ọtụtụ ihe na ihe ọṅụṅụ, ngwaahịa esi nri na ngwaahịa mmiri ara ehi dị ka ihe na-agba ume na stabilizer iji gbochie nkewa mmiri ma melite uto.
Ụlọ ọrụ na-emepụta ọgwụ: Methylcellulose na-eji akwadebe mbadamba ọgwụ dị ka ihe nkedo na nkwụsịtụ, nakwa dị ka mmanụ mmanu na ihe nchebe, dị ka na anya ophthalmic na-adaba dị ka ihe ndochi anya anya mmiri. A na-eji CMC eme ihe n'ọtụtụ ebe na nkà mmụta ọgwụ n'ihi ịdị mma biocompatibility ya, dị ka nkwadebe nke ọgwụ na-adịgide adịgide na nrapado na anya mmiri.
Ụlọ ọrụ na-ewu ụlọ na kemịkalụ: A na-eji MC eme ihe n'ọtụtụ ebe na ihe owuwu ụlọ dị ka onye na-ekpuchi mmiri, onye na-ejide mmiri na nrapado maka ciment na gypsum. Ọ nwere ike melite arụmọrụ ihe owuwu na ogo elu nke ihe. A na-ejikarị CMC eme ihe na ọgwụgwọ apịtị na ngwuputa ala mmanụ, slurry na mbipụta textile na ịcha akwa, mkpuchi elu nke akwụkwọ, wdg.
4. Nchekwa na nchekwa gburugburu ebe obibi
A na-ewere ha abụọ dị mma maka iji nri na ngwa ọgwụ, mana isi mmalite ha na usoro mmepụta ha nwere ike inwe mmetụta dị iche iche na gburugburu ebe obibi. Akụrụngwa nke MC na CMC sitere na cellulose eke ma bụrụ ihe na-emebi emebi, ya mere ha na-arụ ọrụ nke ọma n'ihe gbasara enyi na gburugburu ebe obibi. Otú ọ dị, usoro mmepụta ha nwere ike ịgụnye ihe mgbaze na reagents, nke nwere ike inwe mmetụta ụfọdụ na gburugburu ebe obibi.
5. Ọnụ ahịa na ahịa ahịa
N'ihi usoro mmepụta dị iche iche, ọnụ ahịa mmepụta nke methylcellulose na-adịkarị elu, ya mere ọnụahịa ahịa ya dịkwa elu karịa carboxymethylcellulose. CMC n'ozuzu nwere nnukwu ọchịchọ ahịa n'ihi ngwa ya sara mbara yana ọnụ ahịa mmepụta ya dị ala.
Ọ bụ ezie na methylcellulose na carboxymethylcellulose bụ ihe abụọ sitere na cellulose, ha nwere nnukwu ọdịiche na nhazi, akụrụngwa, ngwa na ọchịchọ ahịa. A na-ejikarị Methylcellulose eme ihe n'ọhịa nke nri, ọgwụ na ihe ụlọ n'ihi mgbanwe okpomọkụ pụrụ iche na njikwa viscosity dị elu. A na-eji Carboxymethyl cellulose mee ihe n'ọtụtụ ebe na nri, ọgwụ, petrochemical, textiles na ụlọ ọrụ ndị ọzọ n'ihi ọmarịcha solubility ya, ngbanwe viscosity na nnukwu pH mgbanwe. Nhọrọ nke mmepụta cellulose dabere na ọnọdụ ngwa na mkpa akọwapụtara.
Oge nzipu: Ọgọst-20-2024