Loaʻa ka Carboxymethyl cellulose (CMC) ma hope o ka carboxymethylation o ka cellulose. Loaʻa i kāna hopena wai nā hana o ka hoʻomānoanoa, ka hana ʻana i ka kiʻiʻoniʻoni, ka hoʻopaʻa ʻana, ka paʻa ʻana i ka wai, ka pale colloid, ka emulsification a me ka hoʻokuʻu ʻana, a hoʻohana nui ʻia i ka petroleum, ka meaʻai, ka lāʻau lapaʻau, a me nā mea ʻē aʻe, nā ʻoihana lole a me ka pepa, ʻo ia kekahi o nā ethers cellulose koʻikoʻi. ʻO ka cellulose kūlohelohe ka polysaccharide i hoʻolaha nui ʻia a nui loa i ke ʻano, a waiwai nui kona mau kumu. ʻO ka ʻenehana hoʻololi o kēia manawa o ka cellulose e kālele nui ana i ka etherification a me ka esterification. ʻO Carboxymethylation kahi ʻano ʻenehana etherification.
nā waiwai kino
ʻO ka sodium carboxymethyl cellulose (CMC) he ʻetera cellulose anionic, me ka pauka fiber flocculent keʻokeʻo a melemele iki paha a i ʻole ka pauka keʻokeʻo ke ʻano, ʻaʻohe ʻala, ʻono ʻole, ʻaʻohe ʻawahia; maʻalahi ka hoʻoheheʻe ʻia i ka wai anuanu a i ʻole ka wai wela, e hana ana i kahi hopena maopopo o ka viscosity. He kūlike ʻole ka hopena a i ʻole he alkaline iki, ʻaʻole hiki ke hoʻoheheʻe ʻia i ka ethanol, ether, isopropanol, acetone a me nā mea hoʻoheheʻe organik ʻē aʻe, hiki ke hoʻoheheʻe ʻia i loko o ka 60% ethanol wai a i ʻole ka hopena acetone. He hygroscopic, paʻa i ka mālamalama a me ka wela, emi ka viscosity me ka piʻi ʻana o ka mahana, paʻa ka hopena ma ka pH 2-10, ʻoi aku ka haʻahaʻa o ka pH ma mua o 2, aia ka ua paʻa, a emi ka viscosity ke kiʻekiʻe ka pH ma mua o 10. ʻO ka mahana discoloration he 227 ℃, ʻo ka mahana carbonization he 252 ℃, a ʻo ka ʻili o ka 2% aqueous solution he 71mn/n.
nā waiwai kemika
Ua hoʻomākaukau ʻia ia mai nā derivatives cellulose o nā substituents carboxymethyl, e mālama ana i ka cellulose me ka sodium hydroxide e hana i ka alkali cellulose, a laila e hana me ka monochloroacetic acid. ʻO ka ʻāpana glucose e hana ana i ka cellulose he 3 mau hui hydroxyl hiki ke pani ʻia, no laila hiki ke loaʻa nā huahana me nā kekelē like ʻole o ka pani ʻana. Ma ka awelika, ua hoʻokomo ʻia he 1 mmol o ka carboxymethyl no 1 g o ke kaumaha maloʻo, kahi mea hiki ʻole ke hoʻoheheʻe ʻia i ka wai a me ka waikawa dilute, akā hiki ke pehu ʻia a hoʻohana ʻia no ka chromatography hoʻololi ion. ʻO Carboxymethyl pKa ma kahi o 4 i ka wai maʻemaʻe a ma kahi o 3.5 i ka 0.5mol/L NaCl. He mea hoʻololi cation acidic nāwaliwali ia a hoʻohana pinepine ʻia no ka hoʻokaʻawale ʻana i nā protein neutral a me nā kumu ma ka pH>4. ʻOi aku ma mua o 40% o nā hui hydroxyl i pani ʻia e nā hui carboxymethyl, hiki ke hoʻoheheʻe ʻia i loko o ka wai e hana i kahi hopena colloidal viscosity kiʻekiʻe paʻa.
ʻO ke kumu nui
ʻO ka Carboxymethyl cellulose (CMC) kahi pauka flocculent keʻokeʻo ʻaʻohe ʻawaʻawa a ʻala ʻole me ka hana paʻa a maʻalahi hoʻi e hoʻoheheʻe ʻia i ka wai. ʻO kona hopena wai he wai viscous kūlohelohe a alkaline paha, hiki ke hoʻoheheʻe ʻia i loko o nā glues a me nā resins wai ʻē aʻe, a hiki ʻole ke hoʻoheheʻe ʻia i loko o nā mea hoʻoheheʻe organik e like me ka ethanol. Hiki ke hoʻohana ʻia ka CMC ma ke ʻano he mea hoʻopili, mea hoʻomānoanoa, mea hoʻomaha, emulsifier, dispersant, stabilizer, mea hoʻonui, a pēlā aku.
ʻO ka sodium carboxymethyl cellulose (CMC) ka huahana me ka hoʻopuka nui loa, ka mea i hoʻohana nui ʻia a me ka hoʻohana kūpono loa ma waena o nā ethers cellulose, i ʻike nui ʻia ʻo "industrial monosodium glutamate".
1. Hoʻohana ʻia no ka ʻeli ʻana i ka ʻaila a me ke kinoea kūlohelohe, ka ʻeli ʻana i ka luawai a me nā papahana ʻē aʻe
① Hiki i ka lepo e loaʻa ana ka CMC ke hana i ka paia o ka luawai e hana i kahi keke kānana lahilahi a paʻa me ka permeability haʻahaʻa, kahi e hōʻemi ai i ka nalowale o ka wai.
② Ma hope o ka hoʻohui ʻana i ka CMC i ka lepo, hiki i ka mea wili ke loaʻa i kahi ikaika haʻahaʻa haʻahaʻa mua, i hiki i ka lepo ke hoʻokuʻu maʻalahi i ke kinoea i wahī ʻia i loko, a i ka manawa like, e hoʻolei koke ʻia nā ʻōpala i loko o ka lua lepo.
③ʻO ka lepo ʻeli, e like me nā mea hoʻopuehu hoʻokuʻu ʻē aʻe, he manawa kū hoʻokahi ko lākou, a ʻo ka hoʻohui ʻana o CMC hiki ke hoʻopaʻa a hoʻolōʻihi i ka manawa o ke ola.
④ ʻAʻole i hoʻopilikia pinepine ʻia ka lepo e loaʻa ana ka CMC e ka ʻōpala, no laila ʻaʻole pono e mālama i kahi waiwai pH kiʻekiʻe a hoʻohana i nā mea mālama.
⑤ Loaʻa iā CMC ma ke ʻano he mea hoʻomaʻemaʻe lepo holoi wai, hiki ke pale aku i ka haumia o nā paʻakai hiki ke hoʻoheheʻe ʻia.
⑥ He kūpaʻa maikaʻi ka lepo e loaʻa ana ka CMC a hiki ke hōʻemi i ka nalowale o ka wai ʻoiai inā ʻoi aku ka mahana ma mua o 150℃.
ʻO CMC me ke kiʻekiʻe o ka mānoanoa a me ke kiʻekiʻe o ka pani ʻana he kūpono ia no ka lepo me ka haʻahaʻa haʻahaʻa, a ʻo CMC me ka haʻahaʻa haʻahaʻa a me ke kiʻekiʻe o ka pani ʻana he kūpono ia no ka lepo me ka nui o ka mānoanoa. Pono e hoʻoholo ʻia ke koho ʻana o CMC e like me nā kūlana like ʻole e like me ke ʻano lepo, ka ʻāpana a me ka hohonu o ka luawai.
2. Hoʻohana ʻia i ka ʻoihana lole, paʻi a me ka hoʻoluʻu ʻana. Hoʻohana ka ʻoihana lole i ka CMC ma ke ʻano he mea ana no ka ana ʻana i ka olonā māmā o ka pulupulu, ka huluhulu silika, ka fiber kemika, nā mea i hui pū ʻia a me nā mea ikaika ʻē aʻe;
3. Hoʻohana ʻia i ka ʻoihana pepa Hiki ke hoʻohana ʻia ʻo CMC ma ke ʻano he mea hoʻomaʻemaʻe ʻili pepa a me ka mea hoʻonui nui i ka ʻoihana pepa. ʻO ka hoʻohui ʻana i ka 0.1% a i ka 0.3% CMC i ka pulp hiki ke hoʻonui i ka ikaika tensile o ka pepa ma 40% a 50%, hoʻonui i ka haki compressive ma 50%, a hoʻonui i ka kneading hiki ke hoʻohui ʻia ma 4 a 5 mau manawa.
4. Hiki ke hoʻohana ʻia ʻo CMC ma ke ʻano he mea hoʻopili lepo i ka wā i hoʻohui ʻia i nā detergents synthetic; nā kemika o kēlā me kēia lā e like me ka ʻoihana toothpaste Hoʻohana ʻia ka hopena wai glycerin CMC ma ke ʻano he kumu gum no ka toothpaste; Hoʻohana ʻia ka ʻoihana lāʻau lapaʻau ma ke ʻano he thickener a me ka emulsifier; Hoʻomānoanoa ʻia ka hopena wai CMC a hoʻohana ʻia no ka hana ʻana i nā mineral lana, a pēlā aku.
5. I loko o ka ʻoihana seramika, hiki ke hoʻohana ʻia ma ke ʻano he mea hoʻopili, plasticizer, mea hoʻokuʻu no ka glaze, mea hoʻopaʻa kala, a pēlā aku.
6. Hoʻohana ʻia i ke kūkulu ʻana e hoʻomaikaʻi i ka paʻa ʻana o ka wai a me ka ikaika
7. Hoʻohana ʻia ia i ka ʻoihana meaʻai. Hoʻohana ka ʻoihana meaʻai i ka CMC me ke kekelē pani kiʻekiʻe e like me ka mea hoʻomānoanoa no ka hau kalima, ka meaʻai i loko o ka pahu, nā noodles i kuke wikiwiki ʻia, a me ka mea hoʻopaʻa huʻa no ka pia, a pēlā aku. No nā mea hoʻomānoanoa, nā mea hoʻopaʻa a i ʻole nā mea hoʻohui.
8. Koho ka ʻoihana lāʻau lapaʻau i ka CMC me ka mānoanoa kūpono ma ke ʻano he mea hoʻopaʻa papa, mea hoʻoheheʻe, a me ka mea hoʻokuʻu no nā hoʻokuʻu.
Ka manawa hoʻouna: Nov-03-2022