Cellulose ether ke polymer ea maiketsetso e entsoeng ka selulose ea tlhaho ka phetoho ea lik'hemik'hale.Cellulose ether e tsoa ho cellulose ea tlhaho.Tlhahiso ea cellulose ether e fapane le li-polymers tsa maiketsetso.Thepa ea eona ea mantlha ke cellulose, motsoako oa tlhaho oa polymer.Ka lebaka la ho khetheha ha sebopeho sa cellulose ea tlhaho, selulose ka boeona ha e na bokhoni ba ho itšoara ka li-etherification agents.Leha ho le joalo, ka mor'a ho phekoloa ha moemeli oa ho ruruha, maqhama a matla a hydrogen pakeng tsa liketane tsa molek'hule le liketane li senyeha, 'me ho lokolloa ka mafolofolo ha sehlopha sa hydroxyl ho fetoha selulose e sebetsang ea alkali.Fumana ether ea cellulose.
Thepa ea cellulose ethers e itšetlehile ka mofuta, palo le kabo ea li-substituent.Sehlopha sa cellulose ether se boetse se aroloa ho ea ka mofuta oa substituent, tekanyo ea etherification, solubility le thepa e amanang le kopo.Ho ea ka mofuta oa li-substituents ka ketane ea molek'hule, e ka aroloa ka monoether le ether e tsoakiloeng.MC eo re tloaetseng ho e sebelisa ke monoether, 'me HPMC ke ether e tsoakiloeng.Methyl cellulose ether MC ke sehlahisoa ka mor'a hore sehlopha sa hydroxyl se karolong ea tsoekere ea cellulose ea tlhaho e nkeloe sebaka ke methoxy.Ke sehlahisoa se fumanoang ka ho kenya karolo ea sehlopha sa hydroxyl sebakeng sa sehlopha ka sehlopha sa methoxy le karolo e 'ngoe ka sehlopha sa hydroxypropyl.Foromo ea sebopeho ke [C6H7O2(OH)3-mn(OCH3)m[OCH2CH(OH)CH3]n]x Hydroxyethyl methyl cellulose ether HEMC, ena ke mefuta e meholo e sebelisoang haholo le e rekisoang' marakeng.
Mabapi le solubility, e ka aroloa ka ionic le non-ionic.Li-ether tse qhibilihang ka metsing tseo e seng tsa ionic cellulose ethers haholo-holo li entsoe ka lihlopha tse peli tsa alkyl ethers le hydroxyalkyl ethers.Ionic CMC e sebelisoa haholo ho li-detergents tsa maiketsetso, khatiso ea masela le ho daea, ho hlahloba lijo le oli.Non-ionic MC, HPMC, HEMC, joalo-joalo li sebelisoa haholo-holo ka thepa ea kaho, liaparo tsa latex, meriana, lik'hemik'hale tsa letsatsi le letsatsi, joalo-joalo E sebelisoa e le motenya, moemeli oa ho boloka metsi, stabilizer, dispersant le moemeli oa ho etsa filimi.
Boitsebiso ba boleng ba cellulose ether:
Phello ea litaba tsa methoxyl ho boleng: ho boloka metsi le ts'ebetso e teteaneng
Tšusumetso ea boleng ba hydroxyethoxyl/hydroxypropoxyl: ha litaba li le holimo, ho boloka metsi ho betere.
Tšusumetso ea boleng ba viscosity: ho phahama ha tekanyo ea polymerization, ho phahama ha viscosity le ho boloka metsi ho molemo.
Tšusumetso ea boleng ba boleng bo botle: ho hasana le ho qhibiliha ha seretse, ho potlakile le ho feta, 'me ho boloka metsi ho molemo.
Tšusumetso ea boleng ba phetisetso ea leseli: ha boemo ba polymerization bo phahame, boemo ba polymerization bo lekana, le litšila tse fokolang.
Tšusumetso ea boleng ba mocheso oa gel: mocheso oa gel bakeng sa kaho o haufi le 75°C
Tšusumetso ea boleng ba metsi: <5%, cellulose ether e bonolo ho monya mongobo, kahoo e lokela ho koaloa le ho bolokoa.
Tšusumetso ea boleng ba molora: <3%, molora o phahame, ho na le litšila tse ngata
Tšusumetso ea boleng ba PH: haufi le ho se nke lehlakore, cellulose ether e na le ts'ebetso e tsitsitseng lipakeng tsa PH: 2-11
Nako ea poso: Feb-14-2023