Kusiyana Pakati pa HPMC ndi HEC

Ma hydroxypropyl methylcellulose ndi hydroxyethyl cellulose onse ndi ma cellulose, kodi kusiyana pakati pa awiriwa ndi kotani?

"Kusiyana Pakati pa HPMC ndi HEC"

01 HPMC ndi HEC
Hydroxypropyl methylcellulose (Hypromellose), yomwe imadziwikanso kuti hypromellose, ndi mtundu wa ether wosakanizidwa wa cellulose wosapangidwa ndi ionic. Ndi polima wosapanga, wosagwira ntchito, wa viscoelastic womwe umagwiritsidwa ntchito kwambiri ngati mafuta odzola mu ophthalmology, kapena ngati chowonjezera kapena chotengera cha mankhwala omwa.
Hydroxyethyl cellulose (HEC), mankhwala opangidwa ndi (C2H6O2)n, ndi yoyera kapena yachikasu chopepuka, yopanda fungo, yopanda poizoni, yopangidwa ndi alkaline cellulose ndi ethylene oxide (kapena chloroethanol). Imakonzedwa ndi etherification ndipo ndi ya ma ether a cellulose osungunuka omwe si a ionic. Chifukwa HEC ili ndi mphamvu zabwino zokhuthala, kuyimitsa, kufalitsa, kusakaniza, kulumikiza, kupanga filimu, kuteteza chinyezi komanso kupereka colloid yoteteza, yagwiritsidwa ntchito kwambiri pakufufuza mafuta, zokutira, zomangamanga, mankhwala ndi chakudya, nsalu, mapepala ndi polima. Polymerization ndi minda ina, 40 mesh sieving rate ≥ 99%.

02 kusiyana
Ngakhale kuti zonsezi ndi cellulose, pali kusiyana kwakukulu pakati pa ziwirizi:
Hydroxypropyl methylcellulose ndi hydroxyethylcellulose zimasiyana mu mawonekedwe, kagwiritsidwe ntchito, ndi kusungunuka.

1. Mbali Zosiyana
Hydroxypropyl methylcellulose: (HPMC) ndi ulusi woyera kapena wofanana ndi woyera kapena ufa wa granular, womwe umapezeka m'mitundu yosiyanasiyana ya ma ether osakanikirana a cellulose omwe si a ionic. Ndi polima ya viscoelastic yomwe siili yamoyo yopangidwa ndi theka.
Hydroxyethylcellulose: (HEC) ndi ulusi woyera kapena wachikasu, wopanda fungo komanso wopanda poizoni kapena ufa wolimba. Umapangidwa ndi alkaline cellulose ndi ethylene oxide (kapena chlorohydrin). Ndi wa non-ionic soluble cellulose ether.

2. Kusungunuka kosiyana
Hydroxypropyl methylcellulose: Susungunuka kwambiri mu ethanol, ether ndi acetone. Yankho la colloidal loyera kapena la mitambo pang'ono limasungunuka m'madzi ozizira.
Hydroxyethyl cellulose: Ili ndi mphamvu zokhuthala, zomangirira, zomangira, zosakaniza, zobalalitsa ndi zonyowetsa. Imatha kukonza mayankho osiyanasiyana m'mitundu yosiyanasiyana ya kukhuthala ndipo imakhala ndi kusungunuka kwa mchere kwa ma electrolyte.
Hydroxypropyl methylcellulose ili ndi mphamvu yokhuthala, kukana mchere wambiri, kukhazikika kwa pH, kusunga madzi, kukhazikika kwa mawonekedwe, mphamvu zabwino kwambiri zopangira filimu, kukana kwambiri ma enzyme, kufalikira komanso kugwirizana.

Pali kusiyana kwakukulu pakati pa ziwirizi, ndipo kufunika kwawo mumakampani nakonso n'kosiyana kwambiri.

Hydroxypropyl methylcellulose imagwiritsidwa ntchito kwambiri ngati chokhuthala, chosungunula, komanso chokhazikika mumakampani opanga zokutira, ndipo imasungunuka bwino m'madzi kapena zinthu zachilengedwe. Mumakampani omanga, ingagwiritsidwe ntchito mu simenti, gypsum, latex putty, plaster, ndi zina zotero, kuti iwonjezere kufalikira kwa mchenga wa simenti ndikuwonjezera kwambiri kusungunuka ndi kusunga madzi mu matope.
Hydroxyethyl cellulose ili ndi mphamvu zokhuthala, kuimitsa, kumangirira, kusakaniza, kufalitsa ndi kunyowetsa. Imatha kukonza mayankho osiyanasiyana m'mitundu yosiyanasiyana ya kukhuthala ndipo imakhala ndi kusungunuka kwabwino kwa mchere wa electrolytes. Hydroxyethyl cellulose ndi chinthu chogwira ntchito bwino chopangira filimu, chogwirizira, chothina, chokhazikika komanso chosungunula mu shampoos, zopopera tsitsi, zoletsa, zodzoladzola ndi zodzoladzola; mu ufa wotsuka. Pakati pali mtundu wa chothandizira chobwezeretsanso dothi. Hydroxyethyl cellulose imasungunuka mwachangu kutentha kwambiri, zomwe zimatha kufulumizitsa njira yopangira ndikuwonjezera magwiridwe antchito opangira. Mbali yodziwikiratu ya sopo wokhala ndi hydroxyethyl cellulose ndikuti imatha kukonza kusalala ndi mercerization ya nsalu.