Hana No ka Hydroxyethyl Cellulose

Hana ʻia ka Hydroxyethyl cellulose (HEC) ma o ka hopena kemika i hoʻomalu ʻia ma waena o cellulose a me ka ethylene oxide, a ukali ʻia e ka hydroxyethylation. ʻO ke kaʻina hana he mau ʻanuʻu, me:

1. Hoʻomākaukau i ka Cellulose: Hoʻomaka ke kaʻina hana me ka hoʻokaʻawale ʻana i ka cellulose mai nā kumu hou e like me ka pulp lāʻau, nā linters pulupulu, a i ʻole nā ​​​​mea kanu ʻē aʻe. Hoʻomaʻemaʻe a hoʻomaʻemaʻe pinepine ʻia ka cellulose e wehe i nā haumia a me ka lignin, ka hopena i kahi mea cellulose hoʻomaʻemaʻe loa.
2. Ethoxylation: Ma kēia ʻanuʻu, hoʻomaʻemaʻe ʻia ka mea cellulose i hoʻomaʻemaʻe ʻia me ka ethylene oxide i mua o nā catalysts alkaline ma lalo o nā kūlana hoʻomalu. Hoʻohui ʻia nā molekole Ethylene oxide i nā pūʻulu hydroxyl (-OH) o ke kaulahao polymer cellulose, e hopena i ka hoʻokomo ʻana i nā pūʻulu ethoxy (-OCH2CH2-) ma ka iwi kuamoʻo cellulose.
3. Hydroxyethylation: Ma hope o ka ethoxylation, ua hoʻopili hou ʻia ka cellulose ethoxylated me ka ethylene oxide a me ka alkali ma lalo o nā kūlana i hoʻomalu ʻia e hoʻokomo i nā pūʻulu hydroxyethyl (-OCH2CH2OH) i ke kaulahao cellulose. Hoʻololi kēia hopena hydroxyethylation i nā waiwai o ka cellulose, e hāʻawi ana i ka solubility wai a me ka hydrophilicity i ka polymer.
4. Hoʻomaʻemaʻe a hoʻomaloʻo: Hoʻomaʻemaʻe ʻia ka cellulose hydroxyethylated e wehe i ke koena reactants, catalysts, a me nā huahana mai ka hui ʻana. ʻO ka HEC i hoʻomaʻemaʻe ʻia e holoi pinepine ʻia, kānana, a maloʻo no ka loaʻa ʻana o kahi pauka maikaʻi a i ʻole granules kūpono no nā noi like ʻole.
5. Ka helu ʻana a me ka hoʻopaʻa ʻana: ʻO ka hope, ua helu ʻia ka huahana HEC ma muli o kāna mau waiwai e like me ka viscosity, ka nui o ka ʻāpana, a me ka maʻemaʻe. A laila hoʻopili ʻia i loko o nā ʻeke, pahu, a i ʻole nā ​​​​ʻeke ʻē aʻe no ka hāʻawi ʻana a mālama.

Hiki ke ʻano liʻiliʻi ke kaʻina hana ma muli o ka pae kikoʻī a me nā koi o ka huahana HEC, a me nā hana hana o kēlā me kēia hui. Hoʻohana maʻamau ʻia nā ana hoʻomalu maikaʻi i loko o ke kaʻina hana e hōʻoia i ka kūlike, ka maʻemaʻe, a me ka hana o ka huahana HEC hope loa.

Hoʻohana ʻia ʻo HEC i nā ʻano hana like ʻole, me ke kūkulu ʻana, nā lāʻau lapaʻau, ka mālama pilikino, a me ka meaʻai, ma muli o kona mānoanoa, hoʻopaʻa ʻana, a me nā waiwai mālama wai.