Qhov txawv ntawm HEC thiab HPMC yog dab tsi?

Hydroxyethyl cellulose (HEC) yog tsim los ntawm etherification cov tshuaj tiv thaiv ntawm alkali cellulose thiab ethylene oxide (los yog chloroethanol). Nws belongs rau cov non-ionic soluble cellulose ether qeb. Raws li non-ionic surfactant, nws muaj cov khoom nram qab no ntxiv rau kev ua kom tuab, tshem tawm, sib txuas, flotation, zaj duab xis tsim, dispersing, dej tuav, thiab muab kev tiv thaiv colloid functions:

• HEC tuaj yeem yaj hauv dej kub lossis dej txias, thiab qhov kub thiab txias los yog boiling tsis precipitate nws, tso cai rau ib tug ntau yam ntawm solubility thiab viscosity yam ntxwv, thiab tsis-thermal gelation.
• HEC lub peev xwm dispersing tsis muaj zog piv rau cov methylcellulose pom zoo thiab hydroxypropyl methylcellulose, tab sis nws muaj zog tiv thaiv colloid muaj peev xwm.
• Ua tsis yog-ionic, nws tuaj yeem ua ke nrog ntau yam ntawm lwm cov dej-soluble polymers, surfactants, thiab ntsev, ua rau nws yog ib qho zoo heev colloidal thickener rau cov kev daws teeb meem uas muaj cov electrolytes siab.
• Nws lub peev xwm tuav dej yog ob npaug ntawm methylcellulose, thiab nws muaj kev tswj xyuas zoo.

Daim ntawv thov ntawm Hydroxyethyl Cellulose: Nws yog siv los ua cov thickener, tiv thaiv tus neeg sawv cev, khi, stabilizer, thiab ua ib qho ntxiv hauv kev npaj ntawm emulsions, gels, tshuaj pleev, tshuaj ntxuav tes, tshuaj ntxuav qhov muag, suppositories, thiab ntsiav tshuaj. Nws kuj yog siv rau hauv hydrogels, scaffold cov ntaub ntawv, kev npaj ntawm matrix-hom sustained-tso formulations, thiab raws li ib tug stabilizer nyob rau hauv cov zaub mov.

Hydroxypropyl Methylcellulose (HPMC) yog tsim los ntawm etherification ntawm cov paj rwb ntshiab refined nyob rau hauv alkaline tej yam kev mob. Nws daim ntawv thov yog raws li nram no:

• Kev tsim kho kev lag luam: Raws li tus neeg saib xyuas dej-retaining thiab retarder hauv cov cement mortar, muab mortar pumpability. Siv nyob rau hauv plastering mortar, gypsum, putty hmoov, los yog lwm yam ntaub ntawv hauv tsev raws li ib tug binder los txhim kho applicability thiab ncua sij hawm operability. Siv rau pasting vuas, marble, yas kho kom zoo nkauj raws li kev sib koom ua ke, thiab tuaj yeem txo cov cement. HPMC cov dej tuav cov khoom tiv thaiv cov tshuaj txhuam los ntawm kev tawg vim ziab sai heev tom qab thov, txhim kho lub zog tom qab hardening.
• Plastics: Ua hauj lwm raws li tus neeg sawv cev tso tawm molding, softener, lubricant, thiab lwm yam.
• Ink printing: Raws li cov thickener, dispersant, thiab stabilizer hauv kev lag luam number case, nws yog sib xws nrog dej los yog organic solvents.
• Kev lag luam xim: Raws li cov thickener, dispersant, thiab stabilizer hauv kev lag luam xim, nws yog sib xws nrog dej los yog cov kuab tshuaj organic. Kuj tseem siv los ua cov tshuaj pleev xim.
• Ceramics manufacturing: Siv dav hauv kev tsim cov khoom siv ceramic.
• Polyvinyl chloride: Siv los ua ib qho dispersant hauv kev tsim cov polyvinyl chloride, nws yog lub luag haujlwm tseem ceeb hauv kev tshem tawm polymerization ntawm PVC.
• Lwm yam: Cov khoom no kuj tau siv dav hauv cov tawv nqaij, cov khoom siv ntawv, cov txiv hmab txiv ntoo thiab zaub khaws cia, thiab kev lag luam textile.