M'dziko la mankhwala, pali mankhwala ambiri omwe ali ndi katundu wofanana koma amasiyana pakugwiritsa ntchito. Chitsanzo chimodzi ndi hydroxypropyl methylcellulose (HPMC) ndi hydroxyethyl cellulose (HEC). Zochokera ku cellulose ziwirizi zimagwiritsidwa ntchito kwambiri m'mafakitale osiyanasiyana, koma kumvetsetsa mawonekedwe awo apadera ndikofunikira kuti tisankhe chotengera choyenera cha ntchito inayake.
Hydroxypropyl methylcellulose, yomwe imadziwika kuti HPMC, ndi yochokera ku cellulose. Amapezedwa pochiza cellulose yachilengedwe ndi propylene oxide ndi methyl chloride, ndikuyambitsa magulu a hydroxypropyl ndi methyl motsatana. Kusintha kumeneku kumawonjezera kusungunuka kwamadzi kwa cellulose ndikuwongolera mawonekedwe ake onse. Kumbali inayi, hydroxyethyl cellulose (HEC) imakhalanso yochokera ku cellulose yomwe imapezeka ndi momwe cellulose yachilengedwe ndi ethylene oxide. Kuyambitsidwa kwa magulu a hydroxyethyl kumapangitsa kuti madzi asungunuke komanso kukhuthala.
Kusiyanitsa kwakukulu pakati pa HPMC ndi HEC ndi malo awo ogwiritsira ntchito. HPMC ili ndi ntchito zosiyanasiyana pamakampani omanga. Amagwiritsidwa ntchito kwambiri ngati zokhuthala muzinthu zopangidwa ndi simenti monga zomatira matailosi, matope osakaniza owuma komanso zodzipangira zokha. Chifukwa cha zinthu zosungira madzi, HPMC imapangitsa kuti zipangizo zomangira izi zikhale bwino, zimamatira komanso zimakhala zolimba. Kuphatikiza apo, HPMC imagwiritsidwa ntchito ngati chopangira filimu mu zokutira ndi utoto, kupereka kukana kwamadzi bwino komanso gloss.
HEC, kumbali ina, imagwiritsidwa ntchito makamaka posamalira anthu komanso zodzoladzola. Amagwiritsidwa ntchito ngati thickener, emulsifier ndi stabilizer mu zonona, mafuta odzola, shampoos ndi zinthu zina kukongola. HEC imakulitsa kukhuthala kwa mafomuwa, zomwe zimapangitsa kuti pakhale mawonekedwe abwino, kufalikira komanso magwiridwe antchito onse. Maluso ake opangira filimu amapangitsanso kuti ikhale yopangira ma gels atsitsi ndi mousses, zomwe zimapatsa nthawi yayitali popanda kukakamira.
Kusiyana kwina kwakukulu ndi kukhuthala kwa ma viscosity osiyanasiyana awa. HPMC nthawi zambiri imakhala ndi mamasukidwe apamwamba kuposa HEC. Kusiyanitsa kwa viscosity uku kumapangitsa HEC kukhala yoyenera kwa mapulogalamu omwe amafunikira magwiridwe antchito otsika mpaka olimba. HEC imapereka kukhazikika kwabwino komanso kuyendetsa bwino pamapangidwe amadzimadzi, kuwonetsetsa ngakhale kugawa kwazinthu zogwira ntchito. Kukhuthala kwapamwamba kwa HPMC, kumbali ina, kumapangitsa kuti ikhale yoyenera kugwiritsa ntchito zomwe zimafunikira kukhuthala pang'ono, monga zida zomangira.
Kuphatikiza apo, HPMC ndi HEC zimasiyana pakulumikizana kwawo ndi zosakaniza zina zamankhwala. HPMC ali ngakhale kwambiri ndi osiyanasiyana zina ndi kulolerana zabwino mchere ndi surfactants, kupanga izo zosunthika mu osiyanasiyana formulations. HEC, ngakhale nthawi zambiri imagwirizana ndi zosakaniza zambiri, ikhoza kukhala ndi zovuta zina zofananira ndi mchere wina, ma acid, ndi ma surfactants. Choncho, posankha pakati pa HPMC ndi HEC, ndikofunika kulingalira zofunikira zogwirizana ndi mapangidwe apadera.
Mwachidule, HPMC ndi HEC, monga zotumphukira za cellulose, zili ndi katundu wawo wapadera komanso ntchito. Kumvetsetsa kusiyana pakati pa mankhwalawa n'kofunika kwambiri posankha pawiri yoyenera pa ntchito inayake. HPMC imagwiritsidwa ntchito kwambiri muzomangamanga monga thickener ndi kupanga mafilimu, pamene HEC imagwiritsidwa ntchito makamaka pazinthu zosamalira munthu monga thickener ndi stabilizer. Poganizira zofunikira za viscosity ndi kuyanjana ndi zosakaniza zina, chotengera choyenera kwambiri cha cellulose chingasankhidwe, kuwonetsetsa kuti magwiridwe antchito abwino komanso zotsatira zomwe mukufuna pakupanga komaliza.
Zikomo chifukwa chogwirizana ndi JINJI CHEMICAL.
Nthawi yotumiza: Nov-14-2023