Kusiyana Pakati pa HPMC ndi HEC

Onse hydroxypropyl methylcellulose ndi hydroxyethyl cellulose ndi mapadi, pali kusiyana kotani pakati pa awiriwa?

"Kusiyana Pakati pa HPMC ndi HEC"

01 HPMC ndi HEC
Hydroxypropyl methylcellulose (Hypromellose), yomwe imadziwikanso kuti hypromellose, ndi mtundu wa ether wopanda ionic cellulose. Ndi semisynthetic, inactive, viscoelastic polima yomwe imagwiritsidwa ntchito ngati mafuta mu ophthalmology, kapena ngati chothandizira kapena galimoto mumankhwala apakamwa.
Hydroxyethyl cellulose (HEC), chemical formula (C2H6O2)n, ndi yoyera kapena yopepuka yachikasu, yopanda fungo, yopanda poizoni kapena yolimba yopangidwa ndi alkaline cellulose ndi ethylene oxide (kapena chloroethanol) Imakonzedwa ndi etherification ndipo ndi ya non- ma ionic soluble cellulose ethers. Chifukwa HEC ili ndi katundu wabwino wa thickening, kuyimitsa, kumwazikana, emulsifying, kugwirizana, kupanga mafilimu, kuteteza chinyezi ndi kupereka colloid zoteteza, zakhala zikugwiritsidwa ntchito kwambiri pofufuza mafuta, zokutira, zomangamanga, mankhwala ndi chakudya, nsalu, mapepala ndi polima polymerization. ndi minda ina, 40 mauna sieving mlingo ≥ 99%.

02 kusiyana
Ngakhale onse ndi cellulose, pali kusiyana kwakukulu pakati pa awiriwa:
Hydroxypropyl methylcellulose ndi hydroxyethylcellulose amasiyana mu katundu, ntchito, ndi kusungunuka.

1. Zosiyanasiyana
Hydroxypropyl methylcellulose: (HPMC) ndi yoyera kapena yofanana ndi ulusi woyera kapena granular ufa, wa ma ether osiyanasiyana osakanikirana a nonionic cellulose. Ndi semisynthetic non-moyo viscoelastic polima.
Hydroxyethylcellulose: (HEC) ndi ulusi woyera kapena wachikasu, wopanda fungo komanso wopanda poizoni kapena ufa wolimba. Amapangidwa ndi alkaline cellulose ndi ethylene oxide (kapena chlorohydrin). Ndi ya non-ionic soluble cellulose ether.

2. Kusungunuka kosiyana
Hydroxypropyl methylcellulose: pafupifupi osasungunuka mu ethanol, ether ndi acetone. Choyera kapena pang'ono mitambo colloidal njira kusungunuka m'madzi ozizira.
Ma cellulose a Hydroxyethyl: Ali ndi mphamvu zokulitsa, kuyimitsa, kumangirira, kutulutsa, kufalitsa ndi kunyowetsa. Ikhoza kukonzekera mayankho m'magawo osiyanasiyana a viscosity ndipo imakhala ndi kusungunuka kwa mchere kwa electrolyte.
Hydroxypropyl methylcellulose ali ndi makhalidwe a thickening luso, otsika mchere kukana, pH kukhazikika, kusunga madzi, dimensional bata, kwambiri mafilimu kupanga katundu, kwambiri enzyme kukana, dispersibility ndi cohesiveness.

Pali kusiyana kwakukulu pakati pa awiriwa, ndipo phindu lawo pamakampani ndi losiyana kwambiri.

Hydroxypropyl methylcellulose amagwiritsidwa ntchito ngati thickener, dispersant ndi stabilizer mu makampani ❖ kuyanika, ndipo ali solubility wabwino m'madzi kapena zosungunulira organic. M'makampani omanga, angagwiritsidwe ntchito mu simenti, gypsum, latex putty, pulasitala, ndi zina zotero, kuti apititse patsogolo kusungunuka kwa mchenga wa simenti ndikuwongolera kwambiri pulasitiki ndi kusunga madzi amatope.
Ma cellulose a Hydroxyethyl ali ndi mphamvu zokulitsa, kuyimitsa, kumanga, kutulutsa, kubalalitsa ndi kunyowetsa. Ikhoza kukonzekera mayankho m'magawo osiyanasiyana a viscosity ndipo imakhala ndi kusungunuka kwa mchere kwa electrolyte. Hydroxyethyl cellulose ndi filimu yogwira ntchito kale, tackifier, thickener, stabilizer ndi dispersant mu shampoos, opopera tsitsi, neutralizers, conditioners ndi zodzoladzola; mu kutsuka ufa Pakati ndi mtundu wa dothi redeposition wothandizira. Ma cellulose a Hydroxyethyl amasungunuka mwachangu kutentha kwambiri, komwe kumatha kufulumizitsa kupanga ndikuwongolera kupanga bwino. Chodziwikiratu cha zotsukira zomwe zili ndi hydroxyethyl cellulose ndikuti zimatha kuwongolera kusalala komanso mercerization ya nsalu.