Kodi Hydroxypropyl methylcellulose ndi chiyani?

1. Mawu Oyamba

Hydroxypropyl methylcellulose (HPMC) ndi polima yosungunuka m'madzi yomwe imagwiritsidwa ntchito kwambiri yochokera ku cellulose. Ndi ufa wopanda ionic, wopanda fungo, wopanda kukoma, woyera mpaka woyera womwe umagwiritsidwa ntchito kwambiri m'mafakitale azakudya, azamankhwala, ndi zodzikongoletsera. HPMC ali osiyanasiyana ntchito, kuphatikizapo thickening, emulsifying, suspending, stabilizing, ndi filimu kupanga. Amagwiritsidwanso ntchito ngati zomangira, zopaka mafuta, komanso zosokoneza popanga mapiritsi ndi makapisozi.

2. Zida Zopangira

Zopangira zazikulu zomwe zimagwiritsidwa ntchito popanga HPMC ndi cellulose, yomwe ndi polysaccharide yopangidwa ndi mayunitsi a shuga. Ma cellulose amatha kupezeka kuchokera kuzinthu zosiyanasiyana, kuphatikiza zamkati zamatabwa, thonje, ndi ulusi wina wazomera. Ma cellulose amathandizidwa ndi mankhwala kuti apange hydroxypropyl methylcellulose.

3. Njira Yopangira

Kupanga kwa HPMC kumaphatikizapo njira zingapo. Choyamba, cellulose amathandizidwa ndi alkali, monga sodium hydroxide, kupanga alkali cellulose. Selulosi ya alkaliyi imasinthidwa ndi methyl chloride ndi propylene oxide kupanga hydroxypropyl methylcellulose. Hydroxypropyl methylcellulose ndiye amatsukidwa ndikuuma kuti apange ufa woyera.

4. Kuwongolera Ubwino

Kuwongolera kwabwino ndi gawo lofunikira pakupanga kwa HPMC. Ubwino wa mankhwalawa umatsimikiziridwa ndi chiyero cha cellulose, kuchuluka kwa m'malo mwa gulu la hydroxypropyl, komanso kuchuluka kwa m'malo mwa gulu la methyl. Kuyera kwa cellulose kumatsimikiziridwa ndikuyesa kukhuthala kwa yankho, pomwe kuchuluka kwa m'malo kumatsimikiziridwa ndikuyesa kuchuluka kwa hydrolysis ya hydroxypropyl methylcellulose.

5. Kuyika

HPMC nthawi zambiri imayikidwa m'matumba kapena ng'oma. Matumba nthawi zambiri amapangidwa ndi polyethylene kapena polypropylene, pomwe ng'oma nthawi zambiri zimapangidwa ndi chitsulo kapena pulasitiki. Zomwe zimapangidwira ziyenera kusankhidwa kuti zitsimikizire kuti mankhwalawa amatetezedwa ku chinyezi ndi zinthu zina zachilengedwe.

6. Kusungirako

HPMC iyenera kusungidwa pamalo ozizira, owuma, kutali ndi kuwala kwa dzuwa ndi magwero ena a kutentha. Chogulitsacho chiyeneranso kutetezedwa ku chinyezi ndi zinthu zina zachilengedwe.

7. Mapeto

HPMC ndi ambiri ntchito madzi sungunuka polima anachokera mapadi. Amagwiritsidwa ntchito m'mafakitale osiyanasiyana, kuphatikiza chakudya, mankhwala, ndi zodzikongoletsera. Kupanga kwa HPMC kumaphatikizapo njira zingapo, kuphatikizapo chithandizo cha cellulose ndi alkali, momwe alkali cellulose ndi methyl chloride ndi propylene oxide, kuyeretsa ndi kuyanika kwa hydroxypropyl methylcellulose. Kuwongolera kwaubwino ndi gawo lofunika kwambiri popanga zinthu, ndipo mankhwalawa ayenera kusungidwa pamalo ozizira, owuma, kutali ndi kuwala kwa dzuwa ndi magwero ena otentha.