Hydroxypropyl methylcellulose Hpmc madzi kusunga zotsatira ndi mfundo

Mu matope a simenti ndi matope opangidwa ndi gypsum, HPMC imagwira ntchito makamaka pakusunga ndi kukhuthala kwa madzi. Imatha kupititsa patsogolo mphamvu yomangirira ndi anti-pituitarism ya matope.

Kutentha kwa mpweya, kutentha kwa mpweya ndi kuthamanga kwa mpweya zimakhudza kuchuluka kwa madzi omwe amasungunuka mu simenti ndi zinthu zopangidwa ndi gypsum.

Mu nyengo zosiyanasiyana, pali kusiyana kwina pa momwe HPMC imasungira madzi. Pa kapangidwe kake, momwe madzi amasungira madzi mu slurry ingasinthire powonjezera kapena kuchepetsa kuchuluka kwa HPMC komwe kumawonjezeredwa. Kusunga madzi mu methyl cellulose ether pansi pa kutentha kwakukulu ndi chizindikiro chofunikira chosiyanitsa mtundu wa methyl cellulose ether. Zogulitsa zabwino kwambiri za HPMC zimatha kuthetsa vuto la kusunga madzi pansi pa kutentha kwakukulu.

Mu nyengo yotentha kwambiri, makamaka m'malo otentha ndi ouma komanso kapangidwe kopyapyala kumbali ya dzuwa. HPMC yapamwamba kwambiri imafunika kuti madzi asungidwe bwino. Ikhoza kukonza mphamvu ya atomu ya okosijeni pa gulu la hydroxyl kupanga chomangira cha hydrogen ndi chomangira cha ether. Pangani madzi omasuka m'madzi omangika, kuti azitha kuwongolera bwino kutuluka kwa madzi chifukwa cha kutentha kwambiri. Kuchuluka kwa madzi osungidwa.

HPMC ya cellulose yapamwamba kwambiri imatha kufalikira mofanana komanso moyenera mu simenti ndi zinthu zopangidwa ndi gypsum. Ndipo kulungani tinthu tonse tolimba kuti mupange filimu yonyowetsa. Chinyezi chomwe chili mu gawo loyambira chimatulutsidwa pang'onopang'ono kwa nthawi yayitali, ndipo zinthu zopangidwa ndi gelling sizipanga hydration. Potero zimaonetsetsa kuti zinthuzo zimakhala zolimba komanso zolimba. Chifukwa chake, ziyenera kupangidwa nthawi yachilimwe yotentha kwambiri kuti zisunge madzi. Onetsetsani kuti mwawonjezera zinthu zapamwamba za HPMC motsatira njira iyi, apo ayi padzakhala mavuto abwino monga kusowa kwa hydration. Koma zimawonjezeranso zovuta pakupanga kwa ogwira ntchito. Pamene kutentha kukutsika, kuchuluka kwa HPMC kumatha kuchepetsedwa pang'onopang'ono, ndipo mphamvu yosungira madzi imathanso kupezeka.