Ke Kaʻina Hana Hana Cellulose Ether

ʻO nā cellulose ethers nā mea maʻamau i hoʻohana ʻia i nā ʻano ʻoihana like ʻole me ke kūkulu ʻana, nā lāʻau lapaʻau a me nā meaʻai.ʻO ke kaʻina hana o ka cellulose ether he paʻakikī loa, pili i nā ʻanuʻu he nui, a koi i ka nui o ka loea a me nā lako kūikawā.Ma kēia ʻatikala, e kūkākūkā nui mākou i ke kaʻina hana o ka cellulose ethers.

ʻO ka hana mua i ka hana hana cellulose ether ka hoʻomākaukau ʻana i nā mea maka.ʻO nā mea maka i hoʻohana ʻia no ka hana ʻana i nā cellulose ethers maʻamau mai ka pulp lāʻau a me ka pulupulu ʻōpala.Hoʻopili ʻia ka pulp lāʻau a hoʻopaʻa ʻia e wehe i nā ʻōpala nui, ʻoiai ʻo ka ʻōpala pulupulu e hana ʻia i pulp maikaʻi.Hoʻemi ʻia ka nui o ka pulp ma ka wili ʻana a loaʻa kahi pauda maikaʻi.Hoʻohui ʻia ka pulupulu lāʻau pauka a me ka pulupulu ʻōpala i nā ʻāpana kikoʻī e pili ana i nā waiwai i makemake ʻia o ka huahana hope.

ʻO ka ʻanuʻu aʻe e pili ana i ka hana kemika o ka meaʻai i hui ʻia.Hoʻomaʻamaʻa mua ʻia ka pulp me kahi solution alkaline (maʻamau ka sodium hydroxide) e wāwahi i ke ʻano fibrous o ka cellulose.A laila mālama ʻia ka cellulose me kahi mea hoʻoheheʻe e like me ka carbon disulfide e hana i ka cellulose xanthate.Hana ʻia kēia mālama ʻana i loko o nā pahu me ka hoʻolako mau ʻana o ka pulp.Hoʻokuʻu ʻia ka solution cellulose xanthate ma o kahi mea extrusion e hana i nā filament.

Ma hope, ua wili ʻia nā filament cellulose xanthate i loko o kahi ʻauʻau me ka waika sulfuric dilute.ʻO kēia ka hopena i ka hana hou ʻana o nā kaulahao cellulose xanthate, e hana ana i nā fiber cellulose.Holoi ʻia nā fiber cellulose hou me ka wai no ka wehe ʻana i nā haumia ma mua o ka bleached.Hoʻohana ke kaʻina hana bleaching i ka hydrogen peroxide e hoʻomaʻemaʻe i ka cellulose fibers, a laila holoi ʻia me ka wai a waiho ʻia e maloʻo.

Ma hope o ka maloʻo ʻana o ka cellulose fibers, hele lākou i kahi kaʻina i kapa ʻia etherification.ʻO ke kaʻina hana etherification e pili ana i ka hoʻokomo ʻana i nā pūʻulu ether, e like me methyl, ethyl a hydroxyethyl pūʻulu, i loko o nā fiber cellulose.Hoʻohana ʻia ke ʻano hana me ka hoʻohana ʻana i ka hopena o kahi mea etherification a me kahi catalyst acid i mua o kahi solvent.Hoʻokō pinepine ʻia nā hopena ma lalo o nā kūlana mālama ʻia o ka mahana a me ke kaomi e hōʻoia i nā hua kiʻekiʻe a me ka maʻemaʻe.

I kēia manawa, aia ka cellulose ether i ke ʻano o ka pauka keʻokeʻo.Hoʻopili ʻia ka huahana i hoʻopau ʻia i kahi ʻano o nā hoʻāʻo hoʻokele maikaʻi e hōʻoia i ka hoʻokō ʻana o ka huahana i nā makemake a me nā kikoʻī i makemake ʻia, e like me ka viscosity, ka maʻemaʻe o ka huahana a me ka ʻoluʻolu.Hoʻopili ʻia a hoʻouna ʻia i ka mea hoʻohana hope.

ʻO ka hōʻuluʻulu ʻana, ʻo ke kaʻina hana o ka cellulose ether e pili ana i ka hoʻomākaukau ʻana i nā mea maka, ka mālama kemika, ka milo, ka bleaching a me ka etherification, a ukali ʻia e ka hoʻāʻo ʻana i ka maikaʻi.Pono ke kaʻina holoʻokoʻa i nā mea hana kūikawā a me ka ʻike o nā hopena kemika a lawe ʻia ma lalo o nā kūlana i hoʻopaʻa ʻia.ʻO ka hana ʻana i nā cellulose ethers he hana paʻakikī a hoʻopau i ka manawa, akā pono ia i nā ʻoihana he nui.