Kutchuka kwa chidziwitso cha hydroxypropyl methylcellulose HPMC

Hydroxypropyl methylcelluloseMtengo wa HPMCndi non-ionic cellulose ether yopangidwa kuchokera ku cellulose yachilengedwe ya polima kudzera mumndandanda wamankhwala. Ndi ufa woyera wopanda fungo, wosakoma komanso wopanda poizoni womwe umatuluka m'madzi ozizira mpaka kumadzi owoneka bwino kapena owunda pang'ono. Lili ndi mphamvu zowonjezera, kumanga, kubalalika, emulsifying, kupanga mafilimu, kuyimitsa, kutsatsa, gelling, pamwamba, kusunga chinyezi ndi colloid yoteteza. Hydroxypropyl methylcellulose, methylcellulose angagwiritsidwe ntchito zomangira, makampani ❖ kuyanika, kupanga utomoni, zoumba mafakitale, mankhwala, chakudya, nsalu, ulimi, tsiku mankhwala ndi mafakitale ena.

Mphamvu yosungira madzi ndi mfundo ya hydroxypropyl methylcellulose HPMC

Cellulose ether HPMC makamaka imagwira ntchito yosungira madzi ndi kukhuthala mumatope a simenti ndi gypsum-based slurry, zomwe zingathe kusintha bwino mgwirizano ndi kukana kwa slurry.

Zinthu monga kutentha kwa mpweya, kutentha ndi kuthamanga kwa mphepo zidzakhudza kusinthasintha kwa madzi mumatope a simenti ndi zinthu zopangidwa ndi gypsum. Chifukwa chake, munyengo zosiyanasiyana, pali kusiyana kwina pakusunga madzi pazinthu zomwe zili ndi kuchuluka komweko kwa HPMC. Pakumanga kwapadera, mphamvu yosungira madzi ya slurry imatha kusinthidwa ndikuwonjezera kapena kuchepetsa kuchuluka kwa HPMC yowonjezeredwa. Kusungidwa kwa madzi kwa methyl cellulose ether pa kutentha kwakukulu ndi chizindikiro chofunikira kusiyanitsa ubwino wa methyl cellulose ether. Zabwino kwambiri HPMC mndandanda mankhwala angathe kuthetsa vuto la posungira madzi pansi kutentha. M'nyengo zotentha kwambiri, makamaka m'malo otentha komanso owuma komanso zomangira zowonda kwambiri kumbali yadzuwa, HPMC yapamwamba imafunika kuti ipititse patsogolo kusunga madzi kwa slurry. HPMC yapamwamba kwambiri, yofanana bwino kwambiri, magulu ake a methoxy ndi hydroxypropoxy amagawidwa mofanana pamagulu a cellulose maselo, omwe amatha kusintha luso la maatomu a okosijeni pa hydroxyl ndi etha kuti agwirizane ndi madzi kuti apange zomangira za haidrojeni , kotero kuti madzi aulere amakhala madzi omangika, kuti athe kuwongolera bwino kutuluka kwa madzi chifukwa cha kutentha kwanyengo ndikukwaniritsa kusungirako madzi ambiri.

Zapamwamba mapadi HPMC akhoza uniformly ndi mogwira omwazika mu matope simenti ndi gypsum ofotokoza mankhwala, ndi encapsulates onse olimba particles, ndi kupanga filimu wetting, ndi chinyezi m'munsi pang'onopang'ono anamasulidwa kwa nthawi yaitali. The hydration anachita wa zinthu coagulating kumachitika, potero kuonetsetsa kugwirizana mphamvu ndi compressive mphamvu zakuthupi. Choncho, pomanga kutentha kwa chilimwe, kuti akwaniritse zotsatira za kusunga madzi, m'pofunika kuwonjezera mankhwala apamwamba a HPMC molingana ndi chilinganizo, apo ayi, padzakhala hydration yosakwanira, kuchepetsa mphamvu, kusweka, kupukuta ndi kugwa. chifukwa cha kuyanika mwachangu. Zimawonjezeranso zovuta zomanga kwa ogwira ntchito. Pamene kutentha kumachepa, kuwonjezereka kwa HPMC kumatha kuchepetsedwa pang'onopang'ono, ndipo zotsatira zofanana zosungira madzi zimatha kupezeka.

Kusungidwa kwa madzi kwa mankhwala a hydroxypropyl methylcellulose HPMC pawokha kumakhudzidwa ndi izi:

1. Ma cellulose ether HPMC homogeneity

HPMC yogwirizana mofanana ili ndi kugawa kofanana kwa magulu a methoxy ndi hydroxypropoxy ndi kusunga madzi kwakukulu.

2. Selulosi etha HPMC kutentha gel osakaniza kutentha

Kutentha kwa gel osakaniza kumapangitsa kuti madzi asapitirire; apo ayi, kutsika kwa madzi osungira madzi.

3. Ma cellulose ether HPMC mamasukidwe akayendedwe

Pamene mamasukidwe akayendedwe a HPMC akuwonjezeka, kuchuluka kwa madzi osungirako kumawonjezekanso; pamene mamasukidwe akayendedwe afika pamlingo wina, kuwonjezeka kwa mlingo wosungira madzi kumakhala kofatsa.

4. Ma cellulose ether HPMC kuwonjezera kuchuluka

Kuchulukirachulukira kwa cellulose ether HPMC kumapangitsa kuti madzi asungidwe komanso kuti madzi asungidwe bwino. Pakati pa 0.25-0.6%, kuchuluka kwa madzi osungira madzi kumawonjezeka mofulumira ndi kuwonjezeka kwa ndalama zowonjezera; pamene kuchuluka kwa ndalama kumawonjezeka, kuwonjezeka kwa madzi osungira madzi kumakhala pang'onopang'ono.