Hydroxypropylmethylcellulose thiab Surface kho HPMC

Hydroxypropylmethylcellulose(HPMC) yog cellulose-based polymer uas tau siv dav hauv kev lag luam tshuaj, zaub mov, thiab tshuaj pleev ib ce. Nws yog cov hmoov dawb los yog dawb dawb uas yog soluble hauv dej thiab tsim cov kua dej ntshiab. HPMC yog siv los ua cov thickener, emulsifier, thiab stabilizer hauv ntau yam khoom. Nws kuj yog siv los ua cov tshuaj pleev xim rau cov ntsiav tshuaj thiab tshuaj ntsiav.

Kev kho deg ntawm HPMC suav nrog kev hloov kho cov khoom saum npoo ntawm polymer los txhim kho nws txoj haujlwm. Kev kho saum npoo tuaj yeem txhim kho qhov adhesion, ntub dej, thiab dispersibility ntawm HPMC. Nws kuj tseem tuaj yeem txhim kho kev sib raug zoo ntawm HPMC nrog rau lwm cov khoom xyaw hauv kev tsim.

Qee qhov kev kho mob saum npoo av rau HPMC suav nrog:

1. Etherification: Qhov no suav nrog kev ua haujlwm HPMC nrog tus neeg sawv cev alkylating los qhia cov pab pawg hydrophobic ntxiv rau saum npoo ntawm cov polymer.

2. Cross-linking: Qhov no suav nrog kev qhia txog kev sib txuas ntawm HPMC molecules kom muaj zog thiab ruaj khov ntawm cov polymer.

3. Acetylation: Qhov no suav nrog kev qhia acetyl pawg rau saum npoo ntawm HPMC kom nws cov solubility thiab stability.

4. Sulfonation: Qhov no suav nrog kev qhia sulfonic acid pawg rau saum npoo ntawm HPMC los txhim kho nws cov dej solubility thiab dispersibility.

Zuag qhia tag nrho, kev kho saum npoo ntawm HPMC tuaj yeem txhim kho nws txoj haujlwm thiab ua kom haum rau ntau yam kev siv.