▲Hydroxypropyl methyl cellulose (HPMC)Ndi ufa woyera wopanda fungo, wopanda kukoma, komanso wopanda poizoni. Ukasungunuka m'madzi, hydroxypropyl methyl cellulose imapanga colloid yowonekera bwino.
▲ Zipangizo zazikulu zopangira hydroxypropyl methyl cellulose (HPMC): thonje loyengedwa, methyl chloride, propylene oxide, ndi zipangizo zina zopangira, caustic soda, acid, toluene, isopropanol, ndi zina zotero.
Kuyerekeza ubwino ndi kuipa kwa hydroxypropyl methyl cellulose:
1. Hydroxypropyl methyl cellulose yoyera ya HPMC ndi yotayirira ndipo ili ndi kachulukidwe kakang'ono, yokhala ndi sikelo ya 0.3–0.4/ml.
HPMC yosungunuka imakhala ndi kusinthasintha kwabwino kwambiri ndipo imamveka yolemera, zomwe zimasiyana kwambiri ndi mawonekedwe enieni a chinthucho.
2. Yankho lamadzi loyera la hydroxypropyl methyl cellulose la HPMC ndi lomveka bwino, limatumiza kuwala kwambiri, ndipo limasunga madzi bwino > 97%.
Madzi a HPMC osungunuka ndi odetsedwa, ndipo kuchuluka kwa madzi omwe amasunga madzi n'kovuta kufika pa 80%.
3. HPMC yoyera sayenera kununkhiza ammonia, starch ndi alcohols.
HPMC yosakanizidwa nthawi zambiri imatha kununkhiza mitundu yonse ya zokometsera, ngakhale itakhala yopanda kukoma, imamva yolemera.
4. Ufa wa HPMC wa hydroxypropyl methyl cellulose ndi wa ulusi pansi pa maikulosikopu kapena galasi lokulitsa.
HPMC yosakanikirana imatha kuwonedwa ngati granular solids kapena crystals pansi pa maikulosikopu kapena galasi lokulitsa.
Kuchokera mbali ziti kuti tizindikire ubwino ndi kuipa kwa hydroxypropyl methyl cellulose?
1. digiri yoyera
Ngakhale kuyera sikungadziwike ngati HPMC ndi yosavuta kugwiritsa ntchito, ndipo ngati zinthu zoyera ziwonjezedwa panthawi yopanga, zidzakhudza ubwino wake. Komabe, zinthu zambiri zabwino zimakhala ndi kuyera kwabwino.
2. Kusalala
Kusalala kwa HPMC nthawi zambiri kumakhala ndi maukonde 80 ndi maukonde 100, ndipo kusalalako kukakhala kochepa, nthawi zambiri kumakhala bwino.
3. Kutumiza
Ikanihydroxypropyl methyl cellulose (HPMC)m'madzi kuti apange colloid yowonekera bwino, ndikuyang'ana momwe kuwala kumayendera. Kuchuluka kwa kuwala komwe kumadutsa, kumakhala bwino, zomwe zikusonyeza kuti mulibe zinthu zambiri zosasungunuka. Kuchuluka kwa ma reactors oyima nthawi zambiri kumakhala bwino, pomwe kwa ma reactors opingasa kumakhala koipa.
4. Kuchuluka
Mphamvu yokoka ikakhala yayikulu, kulemera kwake kumakhala bwino. Kuchuluka kwake kumakhala kwakukulu, makamaka chifukwa chakuti kuchuluka kwa hydroxypropyl group mkati mwake kuli kokwera, ndipo kuchuluka kwa hydroxypropyl group kuli kokwera, kusunga madzi kumakhala bwino.
Nthawi yotumizira: Epulo-25-2024