HEC no ka mea holoi

ʻO ka HEC Hydroxyethyl cellulose he keʻokeʻo a ʻeleʻele melemele fibrous a i ʻole pauka paʻa. ʻAʻole ʻona, ʻono ʻole. He etera nonionic cellulose, hiki ke hoʻoheheʻe ʻia i ka wai anuanu a me ka wai wela ma muli o ka hydrophilic hydroxyethyl i loko o ka mole. Loaʻa i kāna ʻano wai ka waiwai pH o 6.5 ~ 8.5 a paʻa i ka wela. He ʻokoʻa ka hoʻoheheʻe ʻana o ka HEC e like me ke ʻano o ka hoʻololi ʻana (DS). ʻAʻole hiki ke hoʻoheheʻe ʻia i ka hapa nui o nā mea hoʻoheheʻe organik. Loaʻa iā ia nā waiwai o ka mānoanoa, hoʻokuʻu, adhesion, emulsification, dispersion a me ka paʻa ʻana o ka wai, a me nā mea ʻē aʻe, a hiki ke hoʻomākaukau i nā hopena me nā pae viscosity like ʻole. Loaʻa iā ia ka paʻakai maikaʻi ʻole i ka dielectric, a ua ʻae ʻia kona ʻano wai e loaʻa i nā paʻakai kiʻekiʻe a ʻaʻole i loli.

Hydroxyethyl cellulose HEChana i nā mea maka

ʻO nā mea waiwai nui: Cellulose o ke kūlanakauhale (ka pulupulu a i ʻole ka pulp haʻahaʻa), wai alkali, ethylene oxide, ethylene diron (40%)

ʻO ka ʻōnaehana fiber alkali he polymer maoli, aia i kēlā me kēia apo fiber ʻekolu mau pūʻulu hydroxyl, ʻo ka hopena hydroxyl ikaika loa e hana i ka hydroxyethyl cellulose. E hoʻomoʻa i ka pulupulu maka a i ʻole ka pulp ʻai i hoʻomaʻemaʻe ʻia i loko o 30% wai alkali no ka hapalua hola a kaomi iā ia. E ʻoki i ka wai alkaline i ka 1: 2.8, a laila e ʻoki. Hoʻokomo ʻia ka cellulose alkali i loko o ka ipu aniani, hoʻopaʻa ʻia, hoʻopaʻa ʻia, hoʻopiha ʻia me ka nitrogen, a hoʻomaʻamaʻa pinepine ʻia a hoʻopiha ʻia me ka nitrogen e pani i ka ea i ka hihia. Ua kaomi ʻia ka wai ethylene oxide i hoʻomaʻamaʻa mua ʻia i loko o ka ʻaʻahu reactor me ka wai anuanu, a ua hoʻomalu ʻia ka hopena ma kahi o 25C no 2h e loaʻa ai ka hydroxyethyl fiber cable crude product. ʻO nā huahana me ka waiʻona e holoi, hoʻohui i ka neutralization acetic acid i ka VLL 46, hoʻohui ʻo jean i ka glyoxal crosslinking aging. A laila holoi me ka wai, centrifugal dehydration, maloʻo, wili, hydroxyethyl cellulose.

1.1 wai alkali

ʻO ka huahana maʻemaʻe he wai aniani ʻole. 2. 130, wahi hehee 318.4C, wahi paila 1390C. He kūlana pōʻaiapuni ko ka soda caustic ma ka mākeke. A me ka wai ʻelua ʻano: maʻemaʻe maʻemaʻe caustic soda keʻokeʻo, flake, poloka, granular a me ke ʻano koʻokoʻo, cytoplasm: wai maʻemaʻe caustic soda i kapa ʻia he wai alkali, wai aniani ʻole. Loaʻa i nā huahana ʻoihana nā mea haumia, ka nui o ka sodium chloride a me ka sodium carbonate, a i kekahi manawa he wahi liʻiliʻi o ka hao oxide.

1.2 ethylene oxide

ʻO ka Ethylene oxide he mea hoʻohuihui mea ola, ʻano kemika C2H40, he carcinogen ʻona. Hiki ke puhi a pahū ka epoxy cane, ʻaʻole maʻalahi ka lawe ʻana ma kahi lōʻihi, no laila aia kahi ʻāpana ikaika. Hoʻohana nui ʻia ia i ka holoi ʻana, ka lāʻau lapaʻau, ka paʻi ʻana a me ka ʻoihana kala. ʻO 3 oxyethane (E0) ka mea maʻalahi loa o ke apo eter, no nā pūhui heterocyclic, he huahana petrochemical koʻikoʻi. ʻO ka Ethylene oxide he wai ʻaʻohe waihoʻoluʻu i ka wela haʻahaʻa a me ke kinoea kala ʻole me ka ʻala o nā wāwae ma ka lumi wela. He kiʻekiʻe ke kaomi mahu o ke kinoea a hiki i 141kPa ma 30C. Hoʻoholo kēia kaomi mahu kiʻekiʻe i ke komo ikaika ʻana o ka epoxy z.alkane i ka wā e puhi ai. Ka helu hehee (C): -112.2. Māmā pili (wai -1) : 0.8711

1.3 glycoxal

Lele melemele a i ʻole ʻeleʻele like ʻole, e lilo ana i keʻokeʻo i ka hoʻoilo.

Hydroxyethyl cellulosehana HECkaʻina hana

Kaupulupulu staple a i ʻole pulp i hoʻomaʻemaʻe ʻia i 30% lye. Wehe a kaomi. A laila ʻoki ʻia a hana ʻia me ka ethylene oxide i hoʻomaʻamaʻa mua ʻia e hana i ka hydroxyethyl cellulose. A laila holoi me ka waiʻona a hoʻohui i ka waika acetic e holoi a hoʻopau. A laila hoʻohui i ka glyoxal crosslinking aging, holoi wikiwiki me ka wai. ʻO ka hope, ma hope o ka dehydration centrifugation, ka maloʻo ʻana a me ka wili ʻana, ua pauHECloaʻa ka huahana.

He ala no ka hana ʻana i ka lehu haʻahaʻaHECʻO ka hydroxyethyl cellulose ma ke kaʻina hana holoi mau no ka ʻenehana ʻenehana o nā mea. ʻO ka pilikia ʻenehana e hoʻoholo ʻia ʻo ia ka hāʻawi ʻana i kahi kaʻina holoi holoi me ka hana kiʻekiʻe o ka hana ʻana, ka liʻiliʻi liʻiliʻi o ka holoi holoi ʻana a me nā mea waiwai a me ke kumu kūʻai haʻahaʻa e hana ai i ka lehu haʻahaʻa.HEChydroxyethyl cellulose. ʻO ke ʻano o ka holoi mau ʻana e hana i ka lehu haʻahaʻaHECʻIke ʻia ka hydroxyethyl cellulose ma nā ʻanuʻu aʻe: A, ka hydroxyethyl cellulose crude a me crosslinking agent i hui pū ʻia, crosslinking treatment to get slurry A; B. E hoʻohui i ka mea hoʻoheheʻe holoi i ka slurry A i loaʻa ma ka ʻanuʻu A e loaʻa ai ka slurry B; C. E hoʻohui i ka slurry C i loaʻa ma ka ʻanuʻu B i loko o kahi centrifuge kaomi rotary a loaʻa ka lehu haʻahaʻa hydroxyethyl cellulose ma hope o ka holoi mau ʻana. Hiki i ke ala ke hoʻomaikaʻi maikaʻi i ka hana hana, hoʻomaikaʻi nui i ka nalowale o ka holoi ʻana i ka solvent a me nā mea, a hoʻemi nui i ka ʻike lehu o ka huahana, i kūpono i ka popularization a me ka noi.