Musiyano Pakati peHPMC neHEC

Ose ari maviri hydroxypropyl methylcellulose uye hydroxyethyl cellulose ari cellulose, ndeupi musiyano uripo pakati pezviviri izvi?

"Musiyano Pakati peHPMC neHEC"

01 HPMC uye HEC
Hydroxypropyl methylcellulose (Hypromellose), inozivikanwawo se hypromellose, imhando ye-non-ionic cellulose yakasanganiswa ether. Iyo semisynthetic, isingashande, viscoelastic polymer inowanzoshandiswa semafuta ekuzora muophthalmology, kana semubatsiri kana mota mumishonga yemuromo.
Hydroxyethyl cellulose (HEC), kemikari formula (C2H6O2) n, ichena kana kuti yakareruka yeyero, isina kunhuhwirira, isina-chepfu fibrous kana powdery solid inoumbwa nealkaline cellulose uye ethylene oxide (kana chloroethanol) Inogadzirwa ne etherification uye ndeye isiri- Ionic soluble cellulose ethers. Nekuti HEC ine zvinhu zvakanaka zvekukora, kumisa, kuparadzira, emulsifying, kusungirirana, kugadzira firimu, kuchengetedza unyoro nekupa inodzivirira colloid, yakashandiswa zvakanyanya mukutsvagisa mafuta, machira, kuvaka, mishonga uye chikafu, machira, mapepa uye polymerization. nemimwe minda, 40 mesh sieving rate ≥ 99%.

02 musiyano
Kunyangwe ese ari ese cellulose, pane misiyano yakawanda pakati pezviviri izvi:
Hydroxypropyl methylcellulose uye hydroxyethylcellulose zvakasiyana muzvinhu, kushandiswa, uye kunyungudika.

1. Zvimiro Zvakasiyana
Hydroxypropyl methylcellulose: (HPMC) chena kana yakafanana chena fiber kana granular poda, yemhando dzakasiyana-siyana nonionic cellulose yakasanganiswa ethers. Iyo semi-synthetic isiri-inorarama viscoelastic polymer.
Hydroxyethylcellulose: (HEC) ichena kana yero, isinganhuhwi uye isina chepfu faibha kana hupfu hwakasimba. Iyo etherified nealkaline cellulose uye ethylene oxide (kana chlorohydrin). Ndeye-non-ionic soluble cellulose ether.

2. Yakasiyana solubility
Hydroxypropyl methylcellulose: inenge isinganyunguriki mune absolute ethanol, ether uye acetone. Yakajeka kana zvishoma makore ane colloidal mhinduro yakanyungudutswa mumvura inotonhora.
Hydroxyethyl cellulose: Iyo ine zvimiro zvekukora, kumisa, kusunga, emulsifying, kuparadzira uye kunyorova. Inogona kugadzirira mhinduro mumhando dzakasiyana dze viscosity uye ine yakanakisa solubility yemunyu ye electrolytes.
Hydroxypropyl methylcellulose ine hunhu hwekukora kugona, kushomeka kwemunyu kuramba, pH kugadzikana, kuchengetedza mvura, dimensional kugadzikana, yakanakisa firimu-kuumba zvivakwa, yakakura enzyme kuramba, dispersibility uye kubatana.

Pane misiyano yakawanda pakati pezviviri izvi, uye kubatsira kwavo muindasitiri kwakatosiyanawo.

Hydroxypropyl methylcellulose inonyanya kushandiswa se thickener, dispersant uye stabilizer muindastiri yekuputira, uye ine yakanaka solubility mumvura kana organic solvents. Muindasitiri yekuvaka, inogona kushandiswa simende, gypsum, latex putty, plaster, nezvimwewo, kuvandudza dispersibility yejecha resimende uye kuvandudza zvakanyanya plastiki uye kuchengetwa kwemvura kwedhaka.
Hydroxyethyl cellulose ine zvimiro zvekukora, kumisa, kusunga, emulsifying, kuparadzira uye kunyorova. Inogona kugadzirira mhinduro mumhando dzakasiyana dze viscosity uye ine yakanakisa solubility yemunyu ye electrolytes. Hydroxyethyl cellulose inobudirira firimu yekare, tackifier, thickener, stabilizer uye dispersant mune shampoos, bvudzi sprays, neutralizers, conditioners uye cosmetics; mukugezesa poda Pakati imhando yetsvina redeposition agent. Hydroxyethyl cellulose inonyungudika nekukurumidza pakupisa kwepamusoro, iyo inogona kukurumidzira maitiro ekugadzira uye kugadzirisa kugadzirwa kwakanaka. Chinhu chiri pachena chezvinosuka zvine hydroxyethyl cellulose ndechekuti inogona kuvandudza kutsetseka uye mercerization yemachira.