Ke kaʻina hana a me ka laulā noi o ka sodium carboxymethyl cellulose (CMC)

ʻO ka sodium carboxymethyl cellulose (CMC) kahi cellulose ether wai-soluble anionic, kaulahao pololei, kahi hua o ka cellulose kūlohelohe a me ka waikawa chloroacetic ma o ka hoʻololi kemika. Loaʻa i kāna hopena wai nā hana o ka hoʻomānoanoa, ka hoʻokumu ʻana i ka kiʻiʻoniʻoni, ka hoʻopaʻa ʻana, ka paʻa ʻana i ka wai, ka pale colloidal, ka emulsification a me ka hoʻokuʻu ʻana, a hiki ke hoʻohana ʻia ma ke ʻano he flocculant, chelating agent, emulsifier, thickener, wai paʻa agent, sizing agent, film forming material, etc., i hoʻohana nui ʻia i ka meaʻai, lāʻau lapaʻau, electronics, pesticides, ʻili, plastics, paʻi, keramika, ʻoihana kemika o kēlā me kēia lā a me nā ʻoihana ʻē aʻe.

ʻO ka sodium carboxymethyl cellulose he pauka paʻa, i kekahi manawa granular a fibrous paha, keʻokeʻo a melemele māmā paha ke kala, ʻaʻohe ʻala kūikawā, he mea kemika macromolecular, he wettability ikaika, hiki ke hoʻoheheʻe i ka wai, i loko o ka wai e hana i kahi hopena viscous me ka transparency kiʻekiʻe. ʻAʻole hiki ke hoʻoheheʻe ʻia i nā hopena organik maʻamau, e like me ka ethanol, ether, chloroform a me benzene, akā hiki ke hoʻoheheʻe ʻia i ka wai, hoʻoheheʻe pololei ʻia i ka wai me ka lohi iki, akā nui loa ka solubility, a he viscosity ko ka hopena wai. ʻOi aku ka paʻa o ka paʻa i ke kaiapuni maʻamau, no ka mea, he ʻano omo wai a me ka haʻahaʻa, i kahi kaiapuni maloʻo, hiki ke mālama ʻia no ka manawa lōʻihi.

① Kaʻina hana

1. Ke ʻano hana waena wai

ʻO ke kaʻina hana wai-lanahu he kaʻina hana mua loa ia i ka hoʻomākaukau ʻana o ka sodium carboxymethyl cellulose. Ma kēia kaʻina hana, hana ka alkali cellulose a me ka etherifying agent i loko o kahi hopena wai e loaʻa ana nā ion oxygen oxide manuahi, a hoʻohana ʻia ka wai ma ke ʻano he mea hana i ke kaʻina hana, me ka ʻole o nā mea hoʻoheheʻe organik.

2. Ke ʻano hana hoʻoheheʻe

ʻO ke ʻano hana hoʻoheheʻe he ʻano hana hoʻoheheʻe organik, ʻo ia ke kaʻina hana i hoʻomohala ʻia ma ke kumu o ke ʻano wai waena e pani i ka wai me ka mea hoʻoheheʻe organik ma ke ʻano he medium hopena. He kaʻina hana o ka alkaliization a me ka etherification o ka alkali cellulose a me ka monochloroacetic acid i loko o kahi mea hoʻoheheʻe organik. Wahi a ka nui o ka medium hopena, hiki ke hoʻokaʻawale ʻia i ke ʻano kāwili a me ke ʻano slurry ʻauʻau. ʻOi aku ka nui o ka mea hoʻoheheʻe organik i hoʻohana ʻia ma ke ʻano pulping ma mua o ke ʻano kāwili, a ʻo ka nui o ka mea hoʻoheheʻe organik i hoʻohana ʻia ma ke ʻano kāwili ʻo ia ka lakio o ke kaumaha o ka nui o ka cellulose, ʻoiai ʻo ka nui o ka mea hoʻoheheʻe organik i hoʻohana ʻia ma ke ʻano pulping ʻo ia ka lakio o ke kaumaha o ka nui o ka cellulose. Ke hoʻomākaukau ʻia ka sodium carboxymethyl cellulose e ke ʻano slurry ʻauʻau, aia ka paʻa o ka hopena i loko o kahi slurry a i ʻole ke kūlana hoʻokuʻu i loko o ka ʻōnaehana, no laila ua kapa ʻia ke ʻano slurry ʻauʻau ʻo ke ʻano hoʻokuʻu.

3. ʻAno hana slurry

ʻO ke ʻano slurry ka ʻenehana hou loa e hana ai i ka sodium carboxymethyl cellulose. ʻAʻole hiki i ke ʻano slurry ke hana wale i ka sodium carboxymethyl cellulose maʻemaʻe kiʻekiʻe, akā hana pū i ka sodium carboxymethyl cellulose me ke kekelē pani kiʻekiʻe a me ka pani like. ʻO ke kaʻina hana o ke ʻano slurry penei: ʻo ka pulp pulupulu i wili ʻia i pauka e hoʻouna ʻia i ka mīkini alkalizing kū pololei i lako me ka isopropyl alcohol, a hoʻohui ʻia ka hopena sodium hydroxide i ka wā e hui pū ʻia ai ua alkalized, a ʻo ka mahana alkalizing ma kahi o 20 ℃. Ma hope o ka alkalization, hoʻopili ʻia ka mea i ka mīkini etherifying kū pololei, a hoʻohui ʻia ka hopena isopropyl alcohol o ka chloroacetic acid, a ʻo ka mahana etherifying ma kahi o 65 ℃. Wahi a nā koi kikoʻī o ka hoʻohana huahana a me ka maikaʻi, hiki ke hoʻoponopono ʻia ka nui o ka alkalization, ka manawa alkalization, ka nui o ka mea etherifying a me ka manawa etherification a me nā ʻano hana ʻē aʻe.

② Ka laulā o ka noi

1. ʻAʻole wale ʻo CMC kahi mea hoʻopaʻa emulsifying maikaʻi a me ka thickener i nā noi meaʻai, akā he kūpaʻa maikaʻi loa hoʻi ka hau ʻana a me ka hoʻoheheʻe ʻana, a hiki ke hoʻomaikaʻi i ka ʻono o ka huahana a hoʻolōʻihi i ka manawa mālama.

2. I loko o ka detergent, hiki ke hoʻohana ʻia ʻo CMC ma ke ʻano he mea hoʻohui hou ʻana i ka fouling, ʻoi aku hoʻi no ka hopena anti-fouling redeposition o ka lole fiber synthetic hydrophobic, ʻoi aku ka maikaʻi ma mua o ka fiber carboxymethyl.

3. I ka ʻeli ʻana i ka ʻaila, hiki ke hoʻohana ʻia e pale i nā lua aila ma ke ʻano he mea hoʻopaʻa lepo, mea paʻa wai, ʻo ka nui o kēlā me kēia lua aila he 2 ~ 3t nā lua pāpaʻu, nā lua hohonu 5 ~ 6t.

4. Hoʻohana ʻia i ka ʻoihana lole e like me ka mea hoʻonui nui, ka paʻi ʻana a me ka hoʻoluʻu ʻana i ka slurry thickener, ka paʻi ʻana i ka lole a me ka hoʻopau ʻana i ka hoʻopaʻa ʻana.

5. Hoʻohana ʻia e like me ka mea hoʻohuihui anti-settling agent, emulsifier, dispersant, leveling agent, adhesive, hiki ke hoʻokaʻawale like ʻia ka ʻāpana paʻa o ka pena i loko o ka solvent, i ʻole e stratified ka pena no ka manawa lōʻihi, akā hoʻohana ʻia hoʻi i loko o ka putty.

6. Ma ke ʻano he flocculant i ka wehe ʻana i nā ion calcium ma mua o ka sodium gluconate ʻoi aku ka maikaʻi, ma ke ʻano he cation exchange, ʻo ka hiki ke hoʻololi a hiki i ka 1.6ml/g.

7. I ka ʻoihana pepa, hoʻohana ʻia e like me ka mea hoʻonui pepa, hiki ke hoʻomaikaʻi nui i ka ikaika maloʻo a me ka ikaika pulu o ka pepa a me ke kūpaʻa ʻaila, ka omo ʻana o ka ʻīnika a me ke kūpaʻa wai.

8. Ma ke ʻano he hydrosol i nā mea hoʻonani, i hoʻohana ʻia ma ke ʻano he mea hoʻomānoanoa i ka toothpaste, ʻo kona dosage ma kahi o 5%.

Mea Hana a me ka Mea Hoʻolako Carboxymethyl Cellulose（CMC） Kūʻai Nui | EVERBRIGHT (cnchemist.com)