Phapang Pakeng tsa HPMC le HEC

Hydroxypropyl methylcellulose le hydroxyethyl cellulose ka bobedi ke cellulose, phapang ke efe pakeng tsa tsona tse pedi?

"Phapang Pakeng tsa HPMC le HEC"

01 HPMC le HEC
Hydroxypropyl methylcellulose (Hypromellose), e tsejoang hape e le hypromellose, ke mofuta oa ether e tsoakiloeng ea cellulose e seng ea ionic. Ke polymer ea viscoelastic e entsoeng ka halofo, e sa sebetseng, e sebelisoang hangata e le setlolo sa mahlo, kapa e le sesebelisoa sa ho noa.
Hydroxyethyl cellulose (HEC), e leng foromo ea lik'hemik'hale (C2H6O2)n, ke motsoako o mosoeu kapa o mosehla o bobebe, o se nang monko, o se nang chefo o nang le fibrous kapa phofo o entsoeng ka alkaline cellulose le ethylene oxide (kapa chloroethanol). E lokisitsoe ka ho etherification 'me ke ea li-ether tsa cellulose tse qhibilihang tse seng tsa ionic. Hobane HEC e na le litšobotsi tse ntle tsa ho teteana, ho emisa, ho qhalakanya, ho kopanya, ho etsa filimi, ho sireletsa mongobo le ho fana ka colloid e sireletsang, e sebelisitsoe haholo lipatlisisong tsa oli, ho koahela, kaho, meriana le lijo, masela, pampiri le polymer Polymerization le masimo a mang, sekhahla sa ho sieve sa letlooeng sa 40 ≥ 99%.

02 phapang
Leha ka bobeli e le cellulose, ho na le liphapang tse ngata lipakeng tsa tse peli:
Hydroxypropyl methylcellulose le hydroxyethylcellulose li fapana ka thepa, ts'ebeliso le ho qhibiliha ha tsona.

1. Likarolo tse fapaneng
Hydroxypropyl methylcellulose: (HPMC) ke faeba e tšoeu kapa phofo e tšoeu e tšoanang kapa e nang le granular, e leng ea li-ether tse fapaneng tse tsoakiloeng tsa cellulose tse seng tsa ionic. Ke polymer ea viscoelastic e sa pheleng e entsoeng ka halofo.
Hydroxyethylcellulose: (HEC) ke faeba e tšoeu kapa e mosehla, e se nang monko le e se nang chefo kapa phofo e tiileng. E qhibilihisoa ke alkaline cellulose le ethylene oxide (kapa chlorohydrin). Ke ea ether ea cellulose e qhibilihang e seng ionic.

2. Ho qhibiliha ho fapaneng
Hydroxypropyl methylcellulose: Ha e qhibilihe ka ho feletseng ka har'a ethanol, ether le acetone. Tharollo ea colloidal e hlakileng kapa e maru hanyane e qhibilihisitsoeng ka metsing a batang.
Hydroxyethyl cellulose: E na le thepa ea ho teteana, ho emisa, ho tlama, ho kopanya, ho qhalakanya le ho nolofatsa. E ka lokisa litharollo ka mefuta e fapaneng ea viscosity 'me e na le ho qhibiliha ha letsoai ho babatsehang bakeng sa li-electrolyte.
Hydroxypropyl methylcellulose e na le litšobotsi tsa bokhoni ba ho teteana, ho hanyetsa letsoai le tlase, botsitso ba pH, ho boloka metsi, botsitso ba litekanyo, thepa e ntle ea ho etsa filimi, ho hanyetsa li-enzyme tse ngata, ho qhalana le ho kopana.

Ho na le liphapang tse ngata lipakeng tsa tse peli, 'me thuso ea tsona indastering le eona e fapane haholo.

Hydroxypropyl methylcellulose e sebelisoa haholo e le sethibisi, se qhalanyang le se tsitsitseng indastering ea ho koahela, 'me e na le ho qhibiliha ho hotle metsing kapa linthong tse qhibilihang tsa tlhaho. Indastering ea kaho, e ka sebelisoa ka samente, gypsum, latex putty, plaster, jj., ho ntlafatsa ho qhala ha lehlabathe la samente le ho ntlafatsa haholo plasticity le ho boloka metsi ha seretse.
Hydroxyethyl cellulose e na le thepa ea ho teteana, ho emisa, ho tlama, ho kopanya, ho qhalakanya le ho nolofatsa. E ka lokisa litharollo ka mefuta e fapaneng ea viscosity 'me e na le ho qhibiliha ho hoholo ha letsoai bakeng sa li-electrolyte. Hydroxyethyl cellulose ke sesebelisoa se sebetsang sa ho etsa filimi, ho tiisa, ho thickener, ho tsitsisa le ho qhalakanya ka har'a li-shampoo, li-spray tsa moriri, li-neutralizer, li-conditioner le litlolo; ka har'a phofo ea ho hlatsoa Bohareng ho na le mofuta oa moemeli oa ho fetola litšila. Hydroxyethyl cellulose e qhibiliha kapele mochesong o phahameng, e leng se ka potlakisang ts'ebetso ea tlhahiso le ho ntlafatsa katleho ea tlhahiso. Tšobotsi e totobetseng ea li-detergent tse nang le hydroxyethyl cellulose ke hore e ka ntlafatsa boreleli le mercerization ea masela.