Carboxymethyl cellulose (CMC) bụ polymer nwere uru ụlọ ọrụ dị mkpa. Ọ bụ anionic cellulose ether nke na-agbaze mmiri nke sitere na cellulose eke. Cellulose bụ otu n'ime ihe ndị na-emepụta ihe na-emepụta ihe na-emepụta ihe na-eme ka ọ bụrụ akụkụ bụ isi nke mgbidi cell osisi. Cellulose n'onwe ya nwere adịghị ike solubility na mmiri, ma site na kemịkalụ mgbanwe, cellulose nwere ike gbanwee na-emepụta na ezi mmiri solubility, na CMC bụ otu n'ime ha.
The molekụla Ọdịdị nke CMC na-enweta site etherifying hydroxyl (-OH) akụkụ nke cellulose molekul na chloroacetic acid (ClCH2COOH) n'ịwa a carboxymethyl substituent (-CH2COOH). Ọdịdị nke CMC na-ejigide usoro β-1,4-glucose nke cellulose, ma ụfọdụ n'ime hydroxyl dị na ya na-eji otu carboxymethyl dochie ya. Ya mere, CMC na-ejigide njirimara yinye polymer nke cellulose ma nwee ọrụ nke otu carboxymethyl.
Njirimara chemical nke CMC
CMC bụ polymer anionic. Ebe ọ bụ na otu carboxyl (-CH2COOH) na nhazi ya nwere ike ionize iji mepụta ebubo na-adịghị mma na ngwọta mmiri, CMC nwere ike ịmepụta ngwọta colloidal kwụsiri ike mgbe ọ gbasasịrị na mmiri. Mmiri solubility na solubility nke CMC na-emetụta ogo nke nnọchi ya (DS) na ogo nke polymerization (DP). Ogo nnọchi anya na-ezo aka ọnụ ọgụgụ nke otu hydroxyl nọchiri anya otu carboxyl na nkeji glucose ọ bụla. N'ozuzu, ọkwa dị elu nke ngbanwe, otú ahụ ka mma mmiri dị mma. Na mgbakwunye, solubility na viscosity nke CMC na ụkpụrụ pH dị iche iche dịkwa iche. N'ozuzu, ọ na-egosi nkwụsi ike na nkwụsi ike ka mma n'okpuru ọnọdụ na-anọpụ iche ma ọ bụ alkaline, ebe n'okpuru ọnọdụ acidic, solubility nke CMC ga-ebelata ma nwee ike ọbụna ịmalite.
Njirimara anụ ahụ nke CMC
The viscosity nke CMC ngwọta bụ otu n'ime ya kasị mkpa anụ ahụ Njirimara. Viscosity ya metụtara ọtụtụ ihe, gụnyere ntinye ngwọta, ogo nke nnọchi, ogo polymerization, okpomọkụ na uru pH. Njirimara viscosity a nke CMC na-enyere ya aka igosi nkwubi, gelling na nkwụsi ike n'ọtụtụ ngwa. The viscosity nke CMC nwekwara àgwà nke shear thinning, ya bụ, viscosity ga-ebelata n'okpuru elu shiee ike, nke na-eme ka ọ bara uru na ụfọdụ ngwa na-achọ elu fluidity.
Mpaghara ngwa nke CMC
N'ihi njirimara anụ ahụ na kemịkal ya pụrụ iche, a na-eji CMC eme ihe n'ọtụtụ ebe. Nke a bụ ụfọdụ mpaghara ngwa ngwa:
Ụlọ ọrụ nri: A na-eji CMC eme ihe dị ka ihe na-esi ísì, stabilizer na emulsifier na ụlọ ọrụ nri. Ọ nwere ike melite udidi na nkwụsi ike nke nri, dị ka ngwa nkịtị na ice cream, yogọt, jelii na ihendori.
Ụlọ ọrụ na-emepụta ọgwụ: A na-eji CMC eme ihe dị ka ihe mgbakwunye maka ọgwụ na nrapado maka mbadamba nkume na mpaghara ọgwụ. A na-ejikwa ya dị ka moisturizer na onye na-emepụta ihe nkiri na uwe ọnya.
Kemịkalụ kwa ụbọchị: Na ngwaahịa kwa ụbọchị dị ka ntacha eze, ncha ntutu, ncha, wdg, a na-eji CMC eme ihe dị ka ihe na-ekpu mmiri, onye na-akwụsịtụ na ihe nkwụsi ike iji nyere ngwaahịa ahụ aka ịnọgide na-adị mma na arụmọrụ.
Ngwupu mmanụ: A na-eji CMC dị ka onye na-emewanye viscosity na onye na-eme ihe nzacha n'ime mmiri na-egwupụta mmanụ, nke nwere ike imeziwanye njirimara rheological nke nsị mmiri ma gbochie oke ntinye nke mmiri mmiri.
Ụlọ ọrụ na-emepụta ihe na-emepụta ihe: N'ime ụlọ ọrụ textile, a na-eji CMC eme ihe maka akwa akwa akwa na ihe ndị na-emecha ihe, ebe ọ bụ na ụlọ ọrụ na-emepụta akwụkwọ, a na-eji ya dị ka ihe na-eme ka ọ dị ike na onye na-emepụta ihe maka akwụkwọ iji meziwanye ike na ire ụtọ nke akwụkwọ.
Nchekwa gburugburu ebe obibi na nchekwa
CMC bụ ihe na-emetụta gburugburu ebe obibi nke nwere ike imebi ya site na microorganisms na okike, n'ihi ya, ọ gaghị ebute mmetọ ogologo oge na gburugburu ebe obibi. Na mgbakwunye, CMC nwere obere toxicity na nchekwa dị elu, ma nwee ndekọ nchekwa dị mma na nri na ngwa ọgwụ. Ka o sina dị, n'ihi nnukwu mmepụta na ntinye ya, a ka kwesịrị itinye nlebara anya na ọgwụgwọ nke nsị kemịkalụ nke nwere ike ịmepụta n'oge usoro mmepụta ya.
Carboxymethyl cellulose (CMC) bụ ihe na-arụ ọrụ dị iche iche mmiri-soluble anionic polima. CMC nwetara site na mgbanwe kemịkalụ na-ejigide ihe ndị mara mma nke cellulose eke mgbe ha na-enwe ezigbo mmiri solubility na ihe pụrụ iche anụ ahụ na kemịkal. Site n'ịdị arọ ya, gelling, nkwụsi ike na ọrụ ndị ọzọ, a na-eji CMC eme ihe n'ọtụtụ ụlọ ọrụ dịka nri, ọgwụ, kemịkalụ kwa ụbọchị, nsị mmanụ, textiles na akwụkwọ. Nchekwa gburugburu ebe obibi na nchekwa na-emekwa ka ọ bụrụ ihe mgbakwunye kachasị amasị n'ọtụtụ ngwaahịa.
Oge nzipu: Ọgọst-23-2024