Celluloseke karolo e ka sehloohong ea marako a lisele tsa limela, 'me ke polysaccharide e ajoang ka ho fetisisa le e ngata ka ho fetisisa ka tlhaho, e nka karolo e fetang 50% ea carbon content sebakeng sa limela. Har'a bona, lihlahisoa tsa cellulose tsa k'hothone li haufi le 100%, e leng mohloli o hloekileng ka ho fetisisa oa cellulose ea tlhaho. Ka kakaretso lehong, selulose e etsa 40-50%, 'me ho na le 10-30% ea hemicellulose le 20-30% lignin. Cellulose ether ke lentsoe le akaretsang bakeng sa mefuta e fapaneng ea lintho tse nkiloeng ho selulose ea tlhaho e le lisebelisoa tse tala ka etherification. Ke sehlahisoa se entsoeng ka mor'a hore lihlopha tsa hydroxyl ho cellulose macromolecules li nkeloe sebaka ke lihlopha tsa ether. Ho na le intra-ketane le inter-ketane hydrogen ditlamo ka selulose macromolecules, eo ho leng thata ho qhala ka metsing le hoo e ka bang tsohle solvents manyolo, empa ka mor'a etherification, selelekela sa lihlopha ether ka ntlafatsa hydrophilicity le haholo eketsa solubility ka metsi le manyolo solvents. Thepa ea ho qhibiliha.
Cellulose ether e na le botumo ba "industrial monosodium glutamate". E na le thepa e ntle haholo joalo ka botenya ba tharollo, ho qhibiliha ha metsi hantle, ho emisoa kapa botsitso ba latex, ho etsa filimi, ho boloka metsi le ho khomarela. Hape ha e na chefo ebile ha e na tatso, 'me e sebelisoa haholo ho Thepa ea Kaho, meriana, lijo, masela, lik'hemik'hale tsa letsatsi le letsatsi, tlhahlobo ea peterole, merafo, ho etsa pampiri, polymerization, sefofane le masimo a mang a mangata. Cellulose ether e na le melemo ea ts'ebeliso e pharaletseng, tšebeliso e nyane ea yuniti, phello e ntle ea phetoho, le botsoalle ba tikoloho. E ka ntlafatsa haholo le ho ntlafatsa ts'ebetso ea sehlahisoa lefapheng la tlatsetso ea eona, e leng se loketseng ho ntlafatsa ts'ebeliso ea lisebelisoa le boleng bo ekelitsoeng ba sehlahisoa. Li-additives tse nang le botsoalle tikolohong tse bohlokoa mafapheng a fapaneng.
Ho ea ka ionization ea cellulose ether, mofuta oa li-substitute le phapang ea solubility, cellulose ether e ka aroloa ka mekhahlelo e fapaneng. Ho ea ka mefuta e fapaneng ea li-substitute, li-ether tsa cellulose li ka aroloa ka li-ether tse le 'ngoe le li-ether tse tsoakiloeng. Ho ea ka solubility, cellulose ether e ka aroloa ka lihlahisoa tse qhibilihang ka metsing le tse ke keng tsa qhibiliha. Ho ea ka ionization, e ka aroloa ka lihlahisoa tsa ionic, tse seng tsa ionic le tse tsoakiloeng. Har'a li-cellulose ethers tse qhibilihang ka metsing, li-ethers tse se nang ionic cellulose tse kang HPMC li na le khanyetso e ntle haholo ea mocheso le ho hanyetsa letsoai ho feta ionic cellulose ethers (CMC).
Selulose ether e ntlafatsa joang indastering?
Cellulose ether e entsoe ka k'hothone e hloekisitsoeng ka alkalization, etherification le mehato e meng. Ts'ebetso ea tlhahiso ea sehlopha sa meriana HPMC le sehlopha sa lijo HPMC ha e le hantle e tšoana. Ha ho bapisoa le thepa ea mohaho-grade cellulose ether, mokhoa oa tlhahiso ea meriana-grade HPMC le lijo-grade HPMC hloka etherification sethaleng, e leng e rarahaneng, ho le thata ho laola tshebetso ya tlhahiso, 'me e hloka bohloeki bo phahameng ba lisebelisoa le tikoloho ea tlhahiso.
Ho ea ka lintlha tse fanoeng ke Mokhatlo oa China Cellulose Industry Association, kakaretso ea tlhahiso ea lihlahisoa tsa lihlahisoa tsa ether tse se nang ionic tse nang le matla a maholo a tlhahiso ea malapeng, tse kang Hercules Temple, Shandong Heda, joalo-joalo, li feta 50% ea matla a tlhahiso ea naha. Ho na le bahlahisi ba bang ba bangata ba banyenyane bao e seng ba ionic cellulose ether ba nang le matla a tlhahiso a ka tlase ho lithane tse 4,000. Ntle le likhoebo tse 'maloa, boholo ba tsona li hlahisa li-ether tse tloaelehileng tsa moaho tsa mofuta oa cellulose, tse nang le kakaretso ea tlhahiso ea lithane tse ka bang 100,000 ka selemo. Ka lebaka la khaello ea matla a lichelete, likhoebo tse ngata tse nyane li hloleha ho fihlela litekanyetso tsa matsete a ts'ireletso ea tikoloho ho hloekisoa ha metsi le kalafo ea khase ea ho ntša metsi molemong oa ho fokotsa litšenyehelo tsa tlhahiso. Ha naha le sechaba sohle se ntse se ela hloko haholoanyane ts'ireletso ea tikoloho, likhoebo tse indastering tse sa khoneng ho fihlela litlhoko tsa ts'ireletso ea tikoloho li tla koala butle kapa li fokotse tlhahiso. Ka nako eo, indasteri ea naha ea heso ea tlhahiso ea cellulose ether e tla eketseha le ho feta.
Melao-motheo ea ts'ireletso ea tikoloho ea malapeng e ntse e thatafala le ho feta, 'me litlhoko tse tiileng li behiloe pele bakeng sa theknoloji ea ts'ireletso ea tikoloho le matsete mosebetsing oa tlhahiso eacellulose ether. Mehato ea maemo a holimo ea ts'ireletso ea tikoloho e eketsa litšenyehelo tsa tlhahiso ea likhoebo hape e theha moeli o phahameng oa ts'ireletso ea tikoloho. Likhoebo tse sa khoneng ho fihlela litlhoko tsa ts'ireletso ea tikoloho li ka 'na tsa koaloa butle-butle kapa tsa fokotsa tlhahiso ka lebaka la ho hlōleha ho finyella litekanyetso tsa tšireletso ea tikoloho. Ho latela prospectus ea k'hamphani, likhoebo tse fokotsang tlhahiso butle-butle le ho emisa tlhahiso ka lebaka la ts'ireletso ea tikoloho li ka kenyelletsa phepelo e felletseng ea lithane tse ka bang 30,000 / selemo tsa thepa e tloaelehileng ea moaho ea cellulose ether, e thusang ho atolosoa ha likhoebo tse ntle.
E itšetlehile ka cellulose ether, e ntse e tsoela pele ho atolosa lihlahisoa tse phahameng le tse phahameng tsa boleng bo phahameng
Nako ea poso: Apr-25-2024