ʻO ka CMC maʻamau he hui polymer anionic i hoʻomākaukau ʻia ma ka hoʻopili ʻana i ka cellulose kūlohelohe me ka alkali caustic a me ka waikawa monochloroacetic, me ke kaumaha molekala o 6400 (±1 000). ʻO nā huahana nui ʻo ia ka sodium chloride a me ka sodium glycolate. No ka hoʻololi ʻana o ka cellulose kūlohelohe ka CMC. Ua kapa ʻia ʻo ia he "cellulose i hoʻololi ʻia" e ka Food and Agriculture Organization of the United Nations (FAO) a me ka World Health Organization (WHO).
maikaʻi
ʻO nā ʻōuli nui e ana i ka maikaʻi o CMC, ʻo ia ke kekelē o ka pani ʻana (DS) a me ka maʻemaʻe. Ma ke ʻano laulā, ʻokoʻa nā waiwai o CMC ke ʻokoʻa ka DS; ʻo ke kiʻekiʻe o ke kekelē o ka pani ʻana, ʻoi aku ka maikaʻi o ka solubility, a ʻoi aku ka maikaʻi o ka transparency a me ke kūpaʻa o ka hopena. Wahi a nā hōʻike, ʻoi aku ka maikaʻi o ka transparency o CMC ke kekelē o ka pani ʻana he 0.7-1.2, a ʻo ka viscosity o kāna wai hoʻonā ka mea nui loa ke kumukūʻai pH he 6-9. I mea e hōʻoia ai i kona maikaʻi, me ke koho ʻana o ka mea etherifying, pono e noʻonoʻo ʻia kekahi mau mea e pili ana i ke kekelē o ka pani ʻana a me ka maʻemaʻe, e like me ka pilina dosage ma waena o ka alkali a me ka mea etherifying, ka manawa etherification, ka nui o ka wai o ka ʻōnaehana, ka mahana, ka waiwai pH, ka nui o ka hopena a me nā paʻakai.
ʻO ka nānā ʻana i nā pono a me nā hemahema o ka sodium carboxymethyl cellulose
ʻOiaʻiʻo, ʻo ka hoʻomohala ʻana o ka sodium carboxymethyl cellulose he mea i ʻike mua ʻole ʻia. ʻOi loa aku i nā makahiki i hala iho nei, ʻo ka hoʻonui ʻia ʻana o nā kahua noi a me ka hōʻemi ʻana o nā kumukūʻai hana ua hoʻolilo i ka hana ʻana o ka carboxymethyl cellulose i mea kaulana loa. Ua hui pū ʻia nā huahana i kūʻai ʻia.
A laila, pehea e hoʻoholo ai i ka maikaʻi o ka sodium carboxymethyl cellulose, ke kālailai nei mākou mai kekahi mau hiʻohiʻona kino a me ke kemika:
ʻO ka mea mua, hiki ke hoʻokaʻawale ʻia mai kona mahana carbonization. ʻO ka mahana carbonization maʻamau o ka sodium carboxymethyl cellulose he 280-300 ° C. Ke carbonized ma mua o ka hiki ʻana i kēia mahana, a laila he mau pilikia kēia huahana. (ʻO ka maʻamau, hoʻohana ka carbonization i ka umu muffle)
ʻO ka lua, ua hoʻokaʻawale ʻia e kona mahana hoʻololi ʻole. Ma ke ʻano laulā, e loli ke kala o ka sodium carboxymethyl cellulose ke hiki i kahi mahana. ʻO ka pae mahana he 190-200 °C.
ʻO ke kolu, hiki ke ʻike ʻia mai kona ʻano. ʻO ke ʻano o ka hapa nui o nā huahana he pauka keʻokeʻo, a ʻo ka nui o kona ʻāpana he 100 mesh, a ʻo ka hiki ke hele ma waena he 98.5%.
He huahana cellulose i hoʻohana nui ʻia ka sodium carboxymethyl cellulose a he ākea nā noi, no laila aia paha kekahi mau hoʻopunipuni ma ka mākeke. No laila pehea e ʻike ai inā he huahana ia e pono ai nā mea hoʻohana hiki ke hala i ka hoʻāʻo ʻike ma lalo nei.
E koho i 0.5g o ka sodium carboxymethyl cellulose, ʻaʻole maopopo inā he huahana ia o ka sodium carboxymethylcellulose, e hoʻoheheʻe iā ia i loko o 50mL o ka wai a hoʻoulu, e hoʻohui i kahi liʻiliʻi i kēlā me kēia manawa, e hoʻoulu ma 60 ~ 70 ℃, a wela no 20 mau minuke e hana i kahi hopena like, e hoʻomaʻalili Ma hope o ka ʻike ʻana i ka wai, ua hoʻokō ʻia nā hoʻokolohua aʻe.
1. E hoʻohui i ka wai i ka hopena hoʻāʻo e hoʻoheheʻe i 5 mau manawa, e hoʻohui i ka 0.5mL o ka hopena hoʻāʻo waikawa chromotropic i 1 kulu o ia mea, a hoʻomehana i loko o ka ʻauʻau wai no 10 mau minuke e ʻike ʻia he ʻulaʻula-poni.
2. E hoʻohui i 10 mL o ka acetone i 5 mL o ka hopena hoʻāʻo, e lulu a hui maikaʻi e hana i kahi precipitate flocculent keʻokeʻo.
3. E hoʻohui i 1mL o ka hopena hoʻāʻo ketone sulfate i 5mL o ka hopena hoʻāʻo, e kāwili a lulu e hana i kahi precipitate flocculent polū māmā.
4. ʻO ke koena i loaʻa ma ka lehu ʻana o kēia huahana e hōʻike ana i ka hopena maʻamau o ka paʻakai sodium, ʻo ia hoʻi, ka sodium carboxymethyl cellulose.
Ma o kēia mau ʻanuʻu, hiki iā ʻoe ke ʻike inā he sodium carboxymethyl cellulose ka huahana i kūʻai ʻia a me kona maʻemaʻe, e hāʻawi ana i kahi ala maʻalahi a kūpono hoʻi no nā mea hoʻohana e koho pololei i nā huahana.
Ka manawa hoʻouna: Nov-12-2022