Methylcellulose (MC) na carboxymethylcellulose (CMC) bụ ihe abụọ a na-ahụkarị na cellulose, a na-ejikarị ha eme ihe n'ihe gbasara nri, ọgwụ, owuwu ụlọ, ụlọ ọrụ kemịkalụ na ngalaba ndị ọzọ. Ọ bụ ezie na ha niile sitere na cellulose eke gbanwere site na kemịkalụ, enwere nnukwu ọdịiche dị na nhazi kemịkalụ, njirimara anụ ahụ na kemịkalụ, na ojiji ha.
1. Usoro nhazi kemịkalụ na nkwadebe
A na-emepụta Methylcellulose site na imeghachi omume cellulose na methyl chloride (ma ọ bụ methanol) n'okpuru ọnọdụ alkaline. N'oge usoro a, a na-eji methoxy groups (-OCH₃) dochie akụkụ nke hydroxyl groups (-OH) dị na cellulose iji mepụta methylcellulose. Ogo nke nnọchi (DS, ọnụọgụ nke ihe nnọchi kwa otu glucose) nke methylcellulose na-ekpebi ihe onwunwe anụ ahụ na kemịkalụ ya, dị ka ịgbaze na viscosity.
A na-emepụta carboxymethylcellulose site na imeghachi omume cellulose na chloroacetic acid n'okpuru ọnọdụ alkaline, a na-ejikwa carboxymethyl (-CH₂COOH) dochie otu hydroxyl. Ogo nke nnọchi na ogo nke polymerization (DP) nke CMC na-emetụta ike ya na viscosity ya na mmiri. CMC na-adịkarị n'ụdị nnu sodium, nke a na-akpọ sodium carboxymethylcellulose (NaCMC).
2. Njirimara anụ ahụ na nke kemịkalụ
Mmiri Na-agbaze: Methylcellulose na-agbaze na mmiri oyi, mana ọ na-efunahụ mmiri na-agbaze ma na-emepụta jel na mmiri ọkụ. Mmiri na-agbaze na okpomọkụ a na-eme ka o kwe omume iji ya dị ka ihe na-eme ka ọ sie ike ma na-eme ka ọ gbaze na nhazi nri. CMC na-agbaze ma na mmiri oyi ma na mmiri ọkụ, mana mmiri na-agbaze nke mmiri ya na-ebelata ka okpomọkụ na-arị elu.
Viscosity: Ọkwa nke nnọchi na ntinye nke ngwọta na-emetụta viscosity nke ha abụọ. Viscosity nke MC na-ebu ụzọ na-abawanye ma na-ebelata ka okpomọkụ na-abawanye, ebe viscosity nke CMC na-ebelata ka okpomọkụ na-abawanye. Nke a na-enye ha uru nke ha n'ọrụ ụlọ ọrụ dị iche iche.
Ịkwụsi ike na pH: CMC na-adịgide n'ime oke pH sara mbara, ọkachasị n'okpuru ọnọdụ alkaline, nke na-eme ka ọ bụrụ ihe a ma ama dị ka ihe na-eme ka ihe sie ike ma sie ike na nri na ọgwụ. MC na-adịgide n'ọnọdụ na-anọpụ iche ma dịkwa obere alkaline, mana ọ ga-emebi na asịd siri ike ma ọ bụ alkalis.
3. Ebe eji eme ihe
Ụlọ ọrụ nri: A na-ejikarị Methylcellulose eme ihe n'ihe oriri dị ka ihe na-eme ka abụba sie ike, ihe na-eme ka ọ dị nro, na ihe na-eme ka ọ dị jụụ. Dịka ọmụmaatụ, ọ nwere ike iṅomi uto na udidi nke abụba mgbe ọ na-emepụta nri ndị nwere obere abụba. A na-ejikarị Carboxymethylcellulose eme ihe n'ihe ọṅụṅụ, ihe e ji eme achịcha na ihe ndị e ji mmiri ara ehi mee dị ka ihe na-eme ka mmiri sie ike ma na-eme ka uto ya ka mma.
Ụlọ ọrụ ọgwụ: A na-eji Methylcellulose eme ihe n'ịkwadebe mbadamba ọgwụ dị ka ihe na-ejikọ ma na-agbaze, nakwa dị ka ihe na-eme ka mmanụ na ihe nchebe, dị ka ihe na-eme ka anya anya dị ka ihe nnọchi anya anya. A na-ejikarị CMC eme ihe n'ọgwụ n'ihi na ọ na-adakọ nke ọma, dị ka ịkwadebe ọgwụ ndị na-adịgide adịgide na ihe na-arapara n'ahụ anya.
Ụlọ ọrụ owuwu na kemịkalụ: A na-ejikarị MC eme ihe n'ihe owuwu ụlọ dị ka ihe na-eme ka ihe sie ike, ihe na-ejide mmiri na ihe na-arapara maka simenti na gypsum. Ọ nwere ike ime ka arụmọrụ owuwu na ịdị mma elu nke ihe ndị dị na ya ka mma. A na-ejikarị CMC eme ihe n'ịgwọ apịtị n'igwupụta mmanụ, ihe na-eme ka ọ dị nro n'ibipụta ákwà na agba ákwà, ihe mkpuchi elu nke akwụkwọ, wdg.
4. Nchekwa na nchekwa gburugburu ebe obibi
A na-ewere ha abụọ dị ka ihe dị mma maka iji ha eme ihe n'ihe gbasara nri na ọgwụ, mana ebe ha si enweta ha na usoro mmepụta ha nwere ike inwe mmetụta dị iche iche na gburugburu ebe obibi. Ihe ndị e ji emepụta MC na CMC sitere na cellulose eke ma nwee ike ire ere, yabụ ha na-arụ ọrụ nke ọma n'ihe gbasara ịdị mma gburugburu ebe obibi. Agbanyeghị, usoro mmepụta ha nwere ike ịgụnye ihe mgbaze kemịkalụ na ihe ndị na-eme ka ihe dị nro, nke nwere ike inwe mmetụta ụfọdụ na gburugburu ebe obibi.
5. Ọnụ ahịa na ọchịchọ ahịa
N'ihi usoro mmepụta dị iche iche, ọnụ ahịa mmepụta nke methylcellulose na-adịkarị elu, yabụ ọnụ ahịa ahịa ya dịkwa elu karịa carboxymethylcellulose. CMC na-enwekarị ọchịchọ ahịa karịa n'ihi ojiji ya sara mbara na obere ọnụ ahịa mmepụta.
Ọ bụ ezie na methylcellulose na carboxymethylcellulose bụ ihe sitere na cellulose, ha nwere nnukwu ọdịiche n'otú e si arụ ọrụ, ihe ndị e ji arụ ọrụ, ihe ndị e ji arụ ọrụ na ihe ndị a na-achọ n'ahịa. A na-ejikarị Methylcellulose eme ihe n'ihe gbasara nri, ọgwụ na ihe ndị e ji arụ ụlọ n'ihi na ọ na-agbanwe okpomọkụ pụrụ iche na njikwa viscosity dị elu. A na-ejikarị Carboxymethyl cellulose eme ihe n'ọtụtụ ebe na nri, ọgwụ, petrochemical, ákwà na ụlọ ọrụ ndị ọzọ n'ihi na ọ na-agbaze nke ọma, nhazi viscosity na mgbanwe pH sara mbara. Nhọrọ nke cellulose sitere na ya dabere na ọnọdụ na mkpa ya kpọmkwem.
Oge ozi: Ọgọst-20-2024