Momwe mungayezerere kukhuthala kwa hydroxypropyl methyl cellulose

Kupanga hydroxypropyl methyl cellulose yapadera kuti madzi asalowe m'khoma, kudzakhala koyenera kuti chinyezi chikhale mu matope, simenti imapanga ntchito yabwino m'madzi ndipo ntchito ya hydroxypropyl methyl cellulose mu matope ikhoza kukhala yofanana ndi kukhuthala, ndipo kukhuthala kwa hydroxypropyl methyl cellulose kumakhala bwino.

Chinyezi cha hydroxypropyl methyl cellulose chikachuluka kwambiri, madzi osungira hydroxypropyl methyl cellulose adzachepa, ndipo izi zidzatsogolera mwachindunji ku ntchito yomanga ya hydroxypropyl methyl cellulose. Timadziwanso zinthu zomwe zidzakhala zosavuta kulakwitsa, nthawi zonse tiyenera kukhala atsopano, tidzalandira zotsatira zosayembekezereka.

Kukhuthala kooneka bwino ndi chizindikiro chofunikira cha hydroxypropyl methyl cellulose. Njira zodziwika bwino zoyezera ndi kuyeza kukhuthala kozungulira, kuyeza kukhuthala kwa capillary ndi kuyeza kukhuthala kogwa.

Kale, hydroxypropyl methyl cellulose inkapezeka poyesa kukhuthala kwa capillary, pogwiritsa ntchito Uhnscher viscometer. Njira yoyezera nthawi zambiri imakhala yankho lamadzi la 2, ndipo fomula yake ndi iyi: V=Kdt. V ndi kukhuthala kwa masekondi, K ndi kukhazikika kwa viscometer, D ndi kuchuluka kwa kutentha kosasinthasintha, ndipo T ndi nthawi yomwe imatenga kuti ipite kuchokera pamwamba mpaka pansi pa viscometer m'masekondi. Njira imeneyi yogwirira ntchito ndi yovuta kwambiri, ngati pali zinthu zosasungunuka, zimakhala zosavuta kuyambitsa zolakwika, zimakhala zovuta kudziwa mtundu wa hydroxypropyl methylcellulose.

Vuto la kupanga guluu m'magulu ndi vuto lalikulu lomwe makasitomala amakumana nalo. Choyamba, vuto la zipangizo zopangira liyenera kuganiziridwa pomanga guluu m'magulu. Chifukwa chachikulu chomangira guluu m'magulu ndi kusagwirizana pakati pa polyvinyl alcohol (PVA) ndi hydroxypropyl methylcellulose (HPMC). Chifukwa chachiwiri n'chakuti nthawi yosakaniza sikokwanira; Palinso kuti kukhuthala kwa guluu m'magulu sikwabwino.

Pomanga guluu, instant hydroxypropyl methylcellulose (HPMC) iyenera kugwiritsidwa ntchito chifukwa HPMC imangomwazidwa m'madzi ndipo siisungunuka kwenikweni. Pakatha mphindi ziwiri, kukhuthala kwa madzi kumawonjezeka pang'onopang'ono, ndikupanga colloid yowonekera bwino.

Zinthu zotentha zosungunuka, m'madzi ozizira, zimatha kufalikira mwachangu m'madzi otentha, kuzimiririka m'madzi otentha, kutentha kukatsika kufika pa kutentha kwina, kukhuthala kumawonekera pang'onopang'ono, mpaka kupanga colloid yowonekera bwino. Hydroxypropyl methylcellulose (HPMC) mu guluu womangira ndikulimbikitsidwa pa 2-4kg.

Hydroxypropyl methyl cellulose (HPMC) mu guluu wa nyumbayo imakhala yolimba, yowuma, komanso yosunga madzi bwino, ndipo siikhudzidwa ndi kusintha kwa PH, kukhuthala kuchokera ku 100 000 S - 200 000 S kungagwiritsidwe ntchito. Koma popanga si kuchuluka kwa kukhuthala kumakhala bwino, kukhuthala ndi mphamvu ya mgwirizano zimakhala zofanana, kukhuthala kumakhala kokwera, mphamvu zimakhala zochepa, nthawi zambiri kukhuthala kwa 100,000S ndikoyenera.