CMC na uru na ọghọm ya

CMC na-abụkarị ihe mejupụtara polima anionic nke a na-eji emeghachi omume na cellulose eke na caustic alkali na monochloroacetic acid, nke nwere ibu molekul nke 6400 (±1000). Ihe ndị bụ isi sitere na ya bụ sodium chloride na sodium glycolate. CMC bụ nke mgbanwe cellulose eke. Òtù Nri na Ọrụ Ugbo nke Mba Ndị Dị n'Otu (FAO) na Òtù Ahụ Ike Ụwa (WHO) akpọwo ya "cellulose agbanwere agbanwe".

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Ihe ndị bụ isi e ji atụ àgwà CMC bụ ogo nnọchi (DS) na ịdị ọcha. N'ozuzu, ihe ndị dị na CMC dị iche mgbe DS dị iche; ka ogo nnọchi dị elu, ka ọ na-agbaze nke ọma, otú ahụ ka ọ na-esikwa ike ma kwụsie ike nke ngwọta ahụ ka mma. Dịka akụkọ si kwuo, nghọta nke CMC ka mma mgbe ogo nnọchi bụ 0.7-1.2, na viscosity nke mmiri mmiri ya bụ nke kachasị ukwuu mgbe uru pH bụ 6-9. Iji hụ na ịdị mma ya, na mgbakwunye na nhọrọ nke ihe na-eme ka etherifying pụta, a ga-atụlekwa ụfọdụ ihe ndị na-emetụta ogo nnọchi na ịdị ọcha, dị ka mmekọrịta dose dị n'etiti ihe na-eme ka alkali na ihe na-eme ka etherifying pụta, oge etherification, ọdịnaya mmiri sistemụ, okpomọkụ, uru pH, ntinye ngwọta na nnu.

Nyocha nke uru na ọghọm nke sodium carboxymethyl cellulose

Mmepe nke sodium carboxymethyl cellulose bụ ihe a na-ahụtụbeghị mbụ. Karịsịa n'afọ ndị na-adịbeghị anya, mmụba nke ebe a na-eji ya na mbelata ọnụ ahịa mmepụta emeela ka imepụta carboxymethyl cellulose dịkwuo ewu ewu. Ngwaahịa ndị a na-ere na-agwakọta.

Mgbe ahụ, otu esi achọpụta ịdị mma nke sodium carboxymethyl cellulose, anyị na-enyocha site na ụfọdụ echiche anụ ahụ na kemịkalụ:

Nke mbụ, a pụrụ ịmata ya site na okpomọkụ carbonization ya. Okpomọkụ carbonization izugbe nke sodium carboxymethyl cellulose bụ 280-300 Celsius. Mgbe e tinyere ya carbon tupu e ruo okpomọkụ a, ngwaahịa a nwere nsogbu. (N'ozuzu, carbonization na-eji muffle oven)

Nke abụọ, a na-amata ya site na okpomọkụ ya na-agbanwe agba. N'ozuzu, sodium carboxymethyl cellulose na-agbanwe agba mgbe ọ ruru okpomọkụ ụfọdụ. Oke okpomọkụ ya bụ 190-200 °C.

Nke atọ, a pụrụ ịmata ya site n'ọdịdị ya. Ọdịdị nke ọtụtụ ngwaahịa bụ ntụ ọcha, nha ihe ndị dị na ya na-abụkarị 100 mesh, ohere ịgafe ya bụkwa 98.5%.

Sodium carboxymethyl cellulose bụ ngwaahịa cellulose a na-ejikarị eme ihe nke ukwuu ma nwee ọtụtụ ojiji, yabụ enwere ike ịnwe ụfọdụ ihe e ji eme ihe n'ahịa. Yabụ otu esi amata ma ọ bụ ngwaahịa achọrọ maka ndị ọrụ nwere ike ịgafe ule njirimara a.

Họrọ 0.5g nke sodium carboxymethyl cellulose, nke na-amaghị ma ọ bụ ngwaahịa sodium carboxymethylcellulose, gbazee ya na 50mL mmiri wee gwakọta ya, tinye obere ego oge ọ bụla, gwakọta ya na 60 ~ 70 ℃, ma kpoo ya ọkụ ruo nkeji 20 iji mee otu ihe ngwọta, jụọ oyi Mgbe achọpụtara mmiri mmiri ahụ, emere ule ndị a.

1. Tinye mmiri na mmiri nnwale ahụ ka ọ gwakọta ugboro ise, tinye 0.5mL nke mmiri nnwale chromotropic acid na otu ntapụ ya, wee kpoo ya ọkụ n'ime mmiri ịsa ahụ ruo nkeji iri ka ọ dị ka ọbara ọbara-acha odo odo.

2. Tinye 10 mL nke acetone na 5 mL nke ihe ngwọta nnwale ahụ, maa jijiji ma gwakọta ya nke ọma iji mepụta ihe na-akpalite flocculent ọcha.

3. Tinye 1mL nke ihe ngwọta ule ketone sulfate na 5mL nke ihe ngwọta nnwale ahụ, gwakọta ya ma maa jijiji iji mepụta ihe na-akpali akpali na-acha anụnụ anụnụ.

4. Ihe fọdụrụnụ e nwetara site na ntụ nke ngwaahịa a na-egosi mmeghachi omume nkịtị nke nnu sodium, ya bụ, sodium carboxymethyl cellulose.

Site na usoro ndị a, ị nwere ike ịchọpụta ma ngwaahịa azụrụ ọ bụ sodium carboxymethyl cellulose na ịdị ọcha ya, nke na-enye ụzọ dị mfe ma baa uru maka ndị ọrụ iji họrọ ngwaahịa nke ọma.