He aha ka sodium carboxymethylcellulose?

ʻO ka sodium carboxymethylcellulose(CMC) he anionic cellulose ether. ʻO kona helehelena he keʻokeʻo a i ʻole melemele liʻiliʻi flocculent fiber pauda a i ʻole ka pauka keʻokeʻo, ʻaʻala ʻole, ʻono ʻole, a ʻaʻohe mea ʻawaʻawa; hiki ke hoʻoheheʻe ʻia i loko o ke anuanu a i ʻole ka wai wela a hana i kekahi viscosity. ʻoluʻolu maopopo. ʻAʻole hiki ke hoʻonā ʻia i ka ethanol, ether, isopropanol, acetone a me nā mea hoʻoheheʻe organik ʻē aʻe, akā hiki ke hoʻoheheʻe ʻia i loko o 60% ethanol a i ʻole acetone solution. He hygroscopic a paʻa i ka māmā a me ka wela. Hoʻemi ka viscosity me ka piʻi ʻana o ka mahana. Paʻa ka hopena ma ka pH 2-10. Ke emi ka pH ma mua o 2, hoʻoheheʻe ʻia nā mea paʻa. Ke kiʻekiʻe ka pH ma mua o 10, e emi ana ka viscosity. ʻO 227 ° C ka mahana o ka discoloration, ʻo ka mahana carbonization ʻo 252 ° C, a ʻo ka ʻili o ka ʻili o ka 2% aqueous solution he 71mn/n.

waiwai kemika

Loaʻa ia ma ka mālama ʻana i ka cellulose me ka carboxymethyl substituents, ka mālama ʻana i ka cellulose me ka sodium hydroxide e hana ai i ka cellulose alkali, a laila hoʻopili me ka monochloroacetic acid. ʻO ka ʻāpana glucose i hoʻokumu i ka cellulose he ʻekolu mau pūʻulu hydroxyl i hiki ke hoʻololi ʻia, no laila hiki ke loaʻa nā huahana me nā pae like ʻole. Ma ka awelika, 1mmol o ka hui carboxymethyl no ka 1g o ke kaumaha maloʻo ʻaʻole hiki ke hoʻoheheʻe ʻia i loko o ka wai a dilute acid, akā hiki ke pehu a hoʻohana ʻia no ka chromatography hoʻololi ion. ʻO Carboxymethyl pKa ma kahi o 4 i loko o ka wai maʻemaʻe a ma kahi o 3.5 i ka 0.5mol/L NaCl. He mea hoʻololi cation acid nāwaliwali a hoʻohana mau ʻia no ka hoʻokaʻawale ʻana i nā protein kūʻokoʻa a me nā kumu kumu ma ka pH>4. ʻOi aku ma mua o 40% o nā pūʻulu hydroxyl i pani ʻia e nā hui carboxymethyl, hiki ke hoʻoheheʻe ʻia i ka wai e hana i kahi hopena colloidal viscosity paʻa.

ʻO ke kumu nui

ʻO Carboxymethylcellulose (CMC) he pauka flocculent keʻokeʻo ʻaʻohe mea ʻawaʻawa me ka hana paʻa a hiki ke hoʻoheheʻe ʻia i ka wai. ʻO kona wai hoʻoheheʻe ʻia he wai kūʻokoʻa a alkaline transparent viscous wai, hiki ke hoʻoheheʻe ʻia i loko o nā glues a me nā resins ʻē aʻe, a hiki ʻole ke hoʻoheheʻe ʻia i nā mea hoʻoheheʻe kūlohelohe e like me ka ethanol. Hiki ke hoʻohana ʻia ka CMC ma ke ʻano he binder, thickener, suspending agent, emulsifier, dispersant, stabilizer, sizing agent, etc.

ʻO ka sodium carboxymethyl cellulose (CMC) ka huahana me ka nui loa o ka huahana, ka laulā ākea o ka hoʻohana ʻana a me ka hoʻohana maʻalahi ma waena o nā cellulose ethers, i kapa ʻia ʻo "industrial monosodium glutamate".

1. Hoʻohana ʻia i ka ʻaila hinu a me ke kinoea maoli, eli maikaʻi a me nā papahana ʻē aʻe

① Hiki i ka lepo CMC ke hana i ka pā punawai i keke kānana lahilahi a paʻa me ka haʻahaʻa haʻahaʻa, e hōʻemi ana i ka pohō wai.

② Ma hope o ka hoʻohui ʻana i ka CMC i ka ʻōpala, hiki i ka rig wili ke loaʻa i ka ikaika ʻoki mua haʻahaʻa, i hiki i ka ʻōpala ke hoʻokuʻu maʻalahi i ke kinoea i hoʻopili ʻia i loko, a i ka manawa like, hiki ke hoʻolei koke ʻia ka ʻōpala i loko o ka lua lepo.

③ ʻO ka ʻeli ʻana i ka lepo, e like me nā hoʻokuʻu ʻana a me nā hoʻopuehu ʻē aʻe, he ola paʻa. Hiki i ka hoʻohui ʻana i ka CMC ke paʻa a hoʻolōʻihi i ke ola o ka papa.

④ ʻAʻole hiki ke hoʻopili ʻia ka lepo i loko o ka CMC e ka poʻi, no laila ʻaʻole pono e mālama i kahi waiwai pH kiʻekiʻe a hoʻohana i nā preservatives.

⑤ Loaʻa iā CMC ma ke ʻano he lāʻau lapaʻau no ka ʻeli ʻana i ka wai e hoʻoheheʻe ai i ka lepo, hiki ke pale i ka haumia o nā paʻakai hiki ke hoʻoheheʻe ʻia.

⑥ Paʻa maikaʻi ka lepo i loko o ka CMC a hiki ke hōʻemi i ka nalowale wai inā ʻoi aku ka mahana ma luna o 150°C.

ʻO CMC me ka viscosity kiʻekiʻe a me ke kiʻekiʻe o ka hoʻololi ʻana he kūpono ia no ka lepo me ka haʻahaʻa haʻahaʻa, a ʻo CMC me ka viscosity haʻahaʻa a me ke kiʻekiʻe o ka hoʻololi ʻana he kūpono ia no ka lepo me ke kiʻekiʻe kiʻekiʻe. Pono e hoʻoholo ʻia ke koho ʻana o CMC e like me nā kūlana like ʻole e like me ke ʻano lepo, ka ʻāina, a me ka hohonu hohonu.

2. Hoʻohana ʻia i nā ʻoihana textile, paʻi a me ke kala. I ka ʻoihana textile, hoʻohana ʻia ʻo CMC ma ke ʻano he ʻano nui no ka nui o ka wili māmā o ka pulupulu, ka hulu hipa silika, ka fiber kemika, i hui ʻia a me nā mea ikaika ʻē aʻe;

3. Hoʻohana ʻia i ka ʻoihana pepa hiki ke hoʻohana ʻia ʻo CMC e like me ka mea hoʻomaʻemaʻe pepa a me ka ʻoihana sizing i ka ʻoihana pepa. ʻO ka hoʻohui ʻana i ka 0.1% i ka 0.3% o CMC i loko o ka pulp hiki ke hoʻonui i ka ikaika tensile o ka pepa ma 40% a 50%, hoʻonui i ka pale ʻana i ka māwae ma 50%, a hoʻonui i ka waiwai kneading e 4 a 5 mau manawa.

4. Hiki ke hoʻohana ʻia ka CMC ma ke ʻano he adsorbent lepo ke hoʻohui ʻia i nā detergent synthetic; hoʻohana ʻia nā kinikona i kēlā me kēia lā e like me ka ʻoihana toothpaste CMC glycerol aqueous solution e like me ke kumu toothpaste gum; Hoʻohana ʻia ka ʻoihana lāʻau lapaʻau e like me ka mānoanoa a me ka emulsifier; Hoʻohana ʻia ʻo CMC aqueous solution e like me ka lana ma hope o ka mānoanoa Mining a pēlā aku.

5. Hiki ke hoʻohana ʻia e like me ka mea hoʻopili, plasticizer, suspending agent of glaze, color fixing agent, etc. i ka ʻoihana ceramic.

6. Hoʻohana ʻia i ke kūkulu ʻana e hoʻomaikaʻi i ka paʻa ʻana o ka wai a me ka ikaika

7. Hoʻohana ʻia i ka ʻoihana meaʻai. Hoʻohana ka ʻoihana meaʻai i ka CMC me kahi kiʻekiʻe o ka hoʻololi ʻana ma ke ʻano he mānoanoa no ka ice cream, ka meaʻai hiki, nā noodles koke, a me ka mea hoʻopaʻa pahu no ka pia. No nā mea mānoanoa, nā mea hoʻopaʻa a i ʻole nā ​​mea hana conformal.

8. Ua koho ka 'oihana lapa'au i ka CMC me ka viscosity kūpono e like me ka mea ho'opa'a, ka mea ho'oka'awale o ka papa, a me ka mea ho'omaha no ka ho'omaha, etc.