Phapang lipakeng tsa HPMC le HEC

Ka bobeli hydroxypropyl methylcellulose le hydroxyethyl cellulose ke selulose, phapang ke efe lipakeng tsa tse peli?

"Phapang lipakeng tsa HPMC le HEC"

01 HPMC le HEC
Hydroxypropyl methylcellulose (Hypromellose), eo hape e tsejoang e le hypromellose, ke mofuta oa ether e seng ea ionic cellulose e tsoakiloeng. Ke polymer ea semisynthetic, e sa sebetseng, e nang le viscoelastic e atisang ho sebelisoa e le setlolo sa mahlo, kapa e le se thusang kapa koloi meriana ea molomo.
Hydroxyethyl cellulose (HEC), foromo ea lik'hemik'hale (C2H6O2) n, ke 'mala o mosehla o mosoeu kapa o bobebe, o sa nkhang hamonate, o se nang chefo kapa o se nang chefo o entsoeng ka selulose ea alkaline le ethylene oxide (kapa chloroethanol) E lokiselitsoe ka etherification mme ke ea li-non-ionic soluble cellulose ethers. Hobane HEC e na le thepa e ntle ea ho tiisa, ho emisa, ho qhalakanya, emulsifying, ho kopanya, ho etsa filimi, ho sireletsa mongobo le ho fana ka colloid e sireletsang, e 'nile ea sebelisoa haholo ho hlahloba oli, ho roala, ho haha, meriana le lijo, masela, pampiri le polymerization le masimo a mang, 40 mesh sieving rate ≥9%.

02 phapang
Le hoja ka bobeli e le cellulose, ho na le liphapang tse ngata pakeng tsa tse peli:
Hydroxypropyl methylcellulose le hydroxyethylcellulose li fapane ka thepa, ts'ebeliso le ho qhibiliha.

1. Likarolo Tse Fapaneng
Hydroxypropyl methylcellulose: (HPMC) ke fiber e tšoeu kapa e ts'oanang e tšoeu kapa phofo ea granular, e leng ea li-ether tse fapaneng tsa nonionic cellulose tse tsoakiloeng. Ke polymer ea semi-synthetic e sa pheleng ea viscoelastic.
Hydroxyethylcellulose: (HEC) ke tlhale e tšoeu kapa e mosehla, e sa nkhang hamonate ebile e se chefo kapa phofo e tiileng. E entsoe ka alkaline cellulose le ethylene oxide (kapa chlorohydrin). Ke ea non-ionic soluble cellulose ether.

2. Ho qhibiliha ho fapaneng
Hydroxypropyl methylcellulose: e batla e sa qhibilihe ka har'a ethanol e felletseng, ether le acetone. E hlakileng kapa e koahetsoeng ke maru hanyenyane tharollo ea colloidal e qhibilihisitsoeng metsing a batang.
Hydroxyethyl cellulose: E na le litšobotsi tsa ho tenya, ho emisa, ho tlama, ho etsa emulsifying, ho qhalakanya le ho nosetsa. E ka lokisa litharollo mefuteng e fapaneng ea viscosity mme e na le ho qhibiliha ha letsoai ho fetisisang bakeng sa li-electrolyte.
Hydroxypropyl methylcellulose e na le litšoaneleho tsa bokhoni ba ho teteka, ho hanyetsa letsoai le tlaase, pH botsitso, ho boloka metsi, botsitso ba dimensional, thepa e babatsehang ea ho etsa filimi, ho hanyetsa ha li-enzyme tse ngata, ho arohana le ho kopana.

Ho na le liphapang tse ngata lipakeng tsa tsena tse peli, 'me molemo oa tsona indastering le ona o fapane haholo.

Hydroxypropyl methylcellulose e sebelisoa haholo joalo ka motenya, dispersant le stabilizer indastering ea ho roala, 'me e na le ho qhibiliha ho hotle ka metsing kapa ho li-solvents. Ka indasteri ea kaho, e ka sebelisoa ka samente, gypsum, putty latex, plaster, joalo-joalo, ho ntlafatsa dispersibility ea lehlabathe samente le ho ntlafatsa haholo polasetiki le ho boloka metsi a seretse.
Hydroxyethyl cellulose e na le thepa ea ho tiisa, ho emisa, ho tlama, emulsifying, ho qhalakanya le ho nosetsa. E ka lokisa litharollo mefuteng e fapaneng ea viscosity mme e na le ho qhibiliha ha letsoai ho fetisisang bakeng sa li-electrolyte. Hydroxyethyl cellulose ke filimi e sebetsang ea pele, tackifier, thickener, stabilizer le dispersant ka li-shampoo, li-sprays tsa moriri, li-neutralizers, li-conditioner le litlolo; ka ho hlatsoa liphofshoana Bohareng ke mofuta oa ntho e etsang hore litšila li behoe bocha. Hydroxyethyl cellulose e qhibiliha ka potlako mocheso o phahameng, o ka potlakisang ts'ebetso ea tlhahiso le ho ntlafatsa katleho ea tlhahiso. Ntho e totobetseng ea li-detergents tse nang le hydroxyethyl cellulose ke hore e ka ntlafatsa boreleli le mercerization ea masela.