Gutegura carboxymethyl selulose

Carboxymethyl selulose (CMC)ni polymer itandukanye y'amazi-soluble polymer ikomoka kuri selile, ni polyisikaride karemano iboneka murukuta rw'utugingo ngengabuzima. CMC isanga ibikorwa byinshi mubikorwa bitandukanye birimo ibiryo, imiti, amavuta yo kwisiga, imyenda, impapuro, nibindi byinshi kubera imiterere yihariye nko kubyimba, gutuza, guhuza, gukora firime, no kubika amazi. Gutegura CMC bikubiyemo intambwe nyinshi zitangirana no gukuramo selile ziva mumiterere karemano zikurikirwa no kuyihindura kugirango tumenye amatsinda ya carboxymethyl.

1. Gukuramo Cellulose:
Intambwe yambere mugutegura CMC nugukuramo selile mumasoko karemano nkibiti byimbaho, ibiti by'ipamba, cyangwa ibindi bihingwa. Cellulose isanzwe iboneka binyuze murukurikirane rwibikorwa birimo guhumeka, guhumeka, no kwezwa. Kurugero, ibiti byimbaho ​​birashobora kuboneka muburyo bwa mashini cyangwa imiti ikurikirwa no guhumeka hamwe na chlorine cyangwa hydrogen peroxide kugirango ikureho umwanda na lignine.

2. Gukora Cellulose:
Iyo selile imaze gukurwa, igomba gukoreshwa kugirango byoroherezwe kwinjiza amatsinda ya carboxymethyl. Gukora mubisanzwe bigerwaho no kuvura selile hamwe na alkali nka sodium hydroxide (NaOH) cyangwa karubone ya sodium (Na2CO3) mugihe cyubushyuhe nubushyuhe. Kuvura alkali byabyimba fibre ya selile kandi byongera imbaraga zayo mugucamo imigozi ya hydrogène yo hagati na intermolecular.

3. Igisubizo cya Carboxymethylation:
Cellulose ikora noneho ikorerwa carboxymethylation reaction aho amatsinda ya carboxymethyl (-CH2COOH) yinjizwa mumatsinda ya hydroxyl muminyururu ya selile. Iyi reaction mubisanzwe ikorwa mugukora selile ikora hamwe na sodium monochloroacetate (SMCA) imbere ya catalizike ya alkaline nka sodium hydroxide (NaOH). Igisubizo gishobora kugaragazwa kuburyo bukurikira:

Cellulose + Acide Chloroacetic → Carboxymethyl Cellulose + NaCl

Imiterere yimyitwarire harimo ubushyuhe, igihe cyo kubyitwaramo, kwibanda kuri reagent, na pH bigenzurwa neza kugirango habeho umusaruro mwinshi hamwe nicyifuzo cyo gusimburwa (DS) bivuga umubare mpuzandengo wamatsinda ya carboxymethyl yatangijwe kuri glucose yumurongo wa selile.

4. Kutabogama no Gukaraba:
Nyuma ya reaction ya carboxymethylation, selile ya carboxymethyl selile itabangamiwe kugirango ikureho alkali irenze urugero na aside ya chloroacetic idakozwe. Ibi mubisanzwe bigerwaho mugukaraba ibicuruzwa namazi cyangwa umuti wa acide acide ukurikirwa no kuyungurura kugirango utandukanye CMC ikomeye nuruvange rwa reaction.

5. Kwezwa:
CMC isukuye noneho yozwa namazi inshuro nyinshi kugirango ikureho umwanda nkumunyu, reagent zidakozwe, nibindi bicuruzwa. Filtration cyangwa centrifugation irashobora gukoreshwa kugirango itandukanye CMC isukuye namazi yoza.

6. Kuma:
Hanyuma, carboxymethyl selulose isukuwe yumishijwe kugirango ikureho ubushuhe busigaye kandi ibone ibicuruzwa wifuza muburyo bwa poro yumye cyangwa granules. Kuma birashobora kugerwaho hakoreshejwe uburyo butandukanye nko guhumeka ikirere, kumisha vacuum, cyangwa kumisha spray bitewe nibiranga ibicuruzwa byanyuma.

7. Ibiranga no kugenzura ubuziranenge:
YumyeCMCibicuruzwa bikoreshwa muburyo butandukanye bwo kuranga nka Fourier transform infrared spectroscopy (FTIR), magnetiki resonance ya kirimbuzi (NMR), hamwe n'ibipimo bya viscosity kugirango hemezwe imiterere yimiti, urugero rwo gusimbuza, uburemere bwa molekile, nubuziranenge. Ibizamini byo kugenzura ubuziranenge nabyo birakorwa kugirango harebwe niba ibicuruzwa byujuje ibyangombwa bisabwa kubyo bigenewe.

gutegura carboxymethyl selulose ikubiyemo intambwe nyinshi zirimo gukuramo selile mumasoko karemano, gukora, carboxymethylation reaction, kutabogama, kweza, gukama, no kuranga. Buri ntambwe isaba kugenzura neza imiterere yimiterere nibipimo kugirango ugere ku musaruro mwinshi, urwego rwifuzwa rwo gusimburwa, hamwe nubwiza bwibicuruzwa byanyuma. CMC ni polymer ikoreshwa cyane hamwe na progaramu zitandukanye bitewe nimiterere yihariye kandi itandukanye.