Pehea e hoʻomākaukau ʻia ai ka hydroxyethyl cellulose?

ʻO ka cellulose hydroxyethylhe mea nui ka cellulose derivative. Ma muli o nā pono o nā kumuwaiwai maka he nui, hiki ke hoʻohou hou ʻia, biodegradable, non-toxic, biocompatibility maikaʻi, a me ka nui o ka hua, ua huki nui ʻia ka nānā ʻana o kāna noiʻi a me ka hoʻohana ʻana. . ʻO ka waiwai viscosity kahi helu hana koʻikoʻi loa o ka hydroxyethyl cellulose. Ma kēia pepa, ua hoʻomākaukau ʻia ka hydroxyethyl cellulose me ka waiwai viscosity ma luna o 5 × 104mPa·s a me ka waiwai lehu ma lalo o 0.3% e ke ʻano hana synthesis wai-phase ma o ka alkalization a me ka etherification ʻelua-ʻanuʻu.

ʻO ke kaʻina hana alkalization ka hana hoʻomākaukau o ka cellulose alkali. Ma kēia pepa, ʻelua mau ʻano alkalization i hoʻohana ʻia. ʻO ke ʻano mua, ʻo ia ka hoʻohana ʻana i ka acetone ma ke ʻano he diluent. Hoʻomaʻemaʻe pololei ʻia ka mea maka cellulose i loko o kahi ʻano wai o ka sodium hydroxide. Ma hope o ka hana ʻana o ka hopena basification, hoʻohui ʻia kahi mea etherifying e hoʻokō pololei i ka hopena etherification. ʻO ka lua o ke ʻano, ʻo ia ka alkalized ʻana o ka mea maka cellulose i loko o kahi hopena wai o ka sodium hydroxide a me ka urea, a pono e ʻomi ʻia ka cellulose alkali i hoʻomākaukau ʻia e kēia ʻano hana e wehe i ka lye keu ma mua o ka hana etherification. Ua kālailai ʻia ka cellulose alkali i hoʻomākaukau ʻia e nā ʻano like ʻole e ka spectroscopy infrared a me ka diffraction X-ray. Wahi a nā waiwai o nā huahana i hoʻomākaukau ʻia e ka hopena etherification, ua hoʻoholo ʻia ke ʻano koho.

I mea e hoʻoholo ai i ke kaʻina hana synthesis etherification maikaʻi loa, ua kālailai mua ʻia ke ʻano hana o ka antioxidant, lye a me ka glacial acetic acid i ka hana etherification. A laila e hoʻokumu i ka papahana hoʻokolohua o ka hana kumu hoʻokahi, e hoʻoholo i nā mea i loaʻa ka hopena nui i ka hana o ka hydroxyethyl cellulose i hoʻomākaukau ʻia, a hoʻohana i ka viscosity o ka hopena wai 2% o ka huahana ma ke ʻano he helu kuhikuhi. Hōʻike nā hopena hoʻokolohua he nui ka mana o nā mea e like me ka nui o ka diluent i koho ʻia, ka nui o ka ethylene oxide i hoʻohui ʻia, ka manawa alkalization, ka mahana a me ka manawa o ka hana mua, ka mahana a me ka manawa o ka hana ʻelua i ka hana o ka huahana. Ua kahakiʻi ʻia kahi hoʻolālā hoʻokolohua orthogonal me ʻehiku mau mea a me ʻekolu mau pae, a hiki i ke kiʻikuhi hopena i huki ʻia mai nā hopena hoʻokolohua ke kālailai maka i nā mea mua a me nā mea lua a me ke ʻano o ka mana o kēlā me kēia mea. I mea e hoʻomākaukau ai i nā huahana me nā waiwai viscosity kiʻekiʻe, ua hoʻokumu ʻia kahi hoʻolālā hoʻokolohua i hoʻomaikaʻi ʻia, a ua hoʻoholo hope ʻia ke ʻano kūpono no ka hoʻomākaukau ʻana i ka hydroxyethyl cellulose ma o nā hopena hoʻokolohua.

ʻO nā waiwai o ka viscosity kiʻekiʻe i hoʻomākaukau ʻiahydroxyethyl celluloseua kālailai ʻia a hoʻāʻo ʻia, me ka hoʻoholo ʻana i ka viscosity, ka nui o ka lehu, ka transmittance māmā, ka nui o ka makū, a pēlā aku, ma o ka spectroscopy infrared, ka resonance magnetic nuclear, ka chromatography gas, ka diffraction X-ray, ka Thermogravimetric-differential thermal analysis a me nā ʻano hana ʻē aʻe e hoʻohana ʻia e kālailai a wehewehe i ke ʻano o ka huahana, ka like ʻana o ka substituent, ke kekelē substitution molar, ka crystallinity, ka paʻa wela, a pēlā aku. Pili nā ʻano hoʻāʻo i nā kūlana ASTM.

ʻO ka Hydroxyethyl cellulose, kahi mea nui i hana ʻia mai ka cellulose, ua huki ʻia ka manaʻo ma muli o kāna mau kumuwaiwai maka he nui, hiki ke hoʻohou hou ʻia, biodegradable, nontoxic, biocompatible, a me ka hua kiʻekiʻe. ʻO ka viscosity o ka hydroxyethyl cellulose kahi hōʻailona koʻikoʻi loa o kāna hana. ʻOi aku ka viscosity o ka hydroxyethyl cellulose i hoʻomākaukau ʻia ma mua o 5 × 104mPa·s, a ʻoi aku ka liʻiliʻi o ka lehu ma mua o 0.3%.

Ma kēia pepa, ua hoʻomākaukau ʻia ka hydroxyethyl cellulose kiʻekiʻe-viscosity e ke ʻano hana synthesis pae wai ma o ka alkalization a me ka etherification. ʻO ke kaʻina hana alkalization ka hoʻomākaukau ʻana o ka cellulose alkali. E koho mai i ʻelua mau ʻano alkalization. ʻO kekahi, ua alkalized pololei ʻia ka mea cellulose me ka acetone ma ke ʻano he diluent i loko o kahi hopena sodium hydroxide wai, a laila e hana ana i kahi hopena etherification me kahi mea etherifying. ʻO kekahi, ua alkalized ʻia ka mea cellulosic i loko o ka hopena sodium hydroxide wai a me ka urea. Pono e wehe ʻia ka alkali keu i loko o ka cellulose alkali ma mua o ka hopena. Ma kēia pepa, ua aʻo ʻia nā cellulose alkali like ʻole e ka spectroscopy infrared a me ka diffraction X-ray. ʻO ka hope, ua lawe ʻia ke ʻano ʻelua e like me nā waiwai o nā huahana etherification.

I mea e hoʻoholo ai i nā ʻanuʻu hoʻomākaukau o ka etherification, ua aʻo ʻia ke ʻano hana o ka antioxidant, alkali a me ka glacial acetic acid i ke kaʻina hana ʻai. Ua hoʻoholo ʻia nā mea e pili ana i ka hoʻomākaukau ʻana o ka hydroxyethyl cellulose e ka hoʻokolohua kumu hoʻokahi. Ma muli o ka waiwai viscosity o ka huahana i loko o ka 2% aqueous solution. Hōʻike nā hopena hoʻokolohua he nui ka mana o ka nui o ka diluent, ka nui o ka ethylene oxide, ka manawa alkalization, ka mahana a me ka manawa o ka rehydration mua a me ka lua i ka hana o ka huahana. Ua hoʻohana ʻia ke ʻano o ʻehiku mau mea a me ʻekolu mau pae e hoʻoholo ai i ke ʻano hoʻomākaukau maikaʻi loa.

Hoʻopili mākou i nā waiwai o ka mea i hoʻomākaukau ʻiahydroxyethyl cellulose, me ka viscosity, ka lehu, ka hoʻoili ʻana o ka mālamalama, ka makū, a pēlā aku. Ua kūkākūkā ʻia ke ʻano o ke kūkulu ʻana, ka homogeneity substituent, ka molarity substitution, ka crystallinity a me ka paʻa wela e ka infrared, ka resonance magnetic nuclear, ka chromatography gas, ka diffraction X-ray, DSC a me DAT, a ua hoʻohana nā ʻano hoʻāʻo i nā kūlana ASTM.