Hydroxypropyl Methyl Cellulose (HPMC) ndi Mfundo Yosunga Madzi!

Hydroxypropyl methylcellulose (HPMC) ndi ether yosakhala ionic cellulose yopangidwa kuchokera ku cellulose yachilengedwe ya polima kudzera munjira zingapo zama mankhwala.Ndi ufa woyera wopanda fungo, wopanda poizoni komanso wopanda poizoni womwe umatuluka m'madzi ozizira kapena owoneka bwino.Lili ndi makulidwe, kumanga, kubalalika, emulsifying, kupanga mafilimu, kuyimitsa, kutsatsa, kutsekemera, kugwiritsira ntchito pamwamba, kusunga chinyezi komanso kuteteza colloid.Hydroxypropyl methyl cellulose ndi methyl cellulose angagwiritsidwe ntchito pomanga, mafakitale utoto, utomoni kupanga, makampani ceramic, mankhwala, chakudya, nsalu, ulimi, tsiku mankhwala ndi mafakitale ena.

Kusunga madzi ndi mfundo ya hydroxypropyl methylcellulose HPMC

Cellulose ether HPMC makamaka imagwira ntchito yosungira madzi ndikukhuthala mumatope a simenti ndi matope opangidwa ndi gypsum, ndipo imatha kupititsa patsogolo mphamvu yolumikizana ndi kukana kwa slurry.

Zinthu monga kutentha kwa mpweya, kutentha ndi kuthamanga kwa mphepo zidzakhudza kusungunuka 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 pansi 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 kumbali yadzuwa, HPMC yapamwamba imafunikira kuti ipititse patsogolo kusunga madzi kwa slurry.HPMC yapamwamba kwambiri imakhala yabwino kwambiri.Magulu ake a methoxy ndi hydroxypropoxy amagawidwa mofanana pamagulu a cellulose maselo, omwe amatha kupititsa patsogolo luso la maatomu a okosijeni pamagulu a hydroxyl ndi ether kuti agwirizane ndi madzi kuti apange ma hydrogen bond., kotero kuti madzi aulere amakhala madzi omangika, kuti athe kuwongolera bwino kutuluka kwa madzi chifukwa cha kutentha kwanyengo, ndikukwaniritsa kusunga madzi kwapamwamba.

apamwamba mapadi HPMC akhoza uniformly ndi mogwira omwazika mu simenti matope ndi gypsum ofotokoza mankhwala, ndi kukulunga particles onse olimba, ndi kupanga chonyowa filimu, chinyezi m'munsi ndi pang'onopang'ono anamasulidwa kwa nthawi yaitali, ndi zolengedwa guluu The hydration anachita wa coagulated zakuthupi adzaonetsetsa mphamvu chomangira ndi compressive mphamvu zakuthupi.Choncho, pomanga chilimwe chotentha kwambiri, kuti mukwaniritse kusungirako madzi, m'pofunika kuwonjezera mankhwala apamwamba a HPMC pamlingo wokwanira molingana ndi chilinganizo, apo ayi, padzakhala hydration yosakwanira, mphamvu yochepa, kusweka, kuphulika. ndi kukhetsa chifukwa cha kuyanika kwambiri.mavuto, komanso kuonjezera zovuta zomangamanga ogwira ntchito.Pamene kutentha kumatsika, kuchuluka kwa madzi a HPMC omwe amawonjezeredwa akhoza kuchepetsedwa pang'onopang'ono, ndipo zotsatira zofanana zosungira madzi zimatha kutheka.

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

HPMC, methoxyl ndi hydroxypropoxyl zimagawidwa mofanana, ndipo madzi osungira madzi ndi apamwamba;

Selulosi etha HPMC matenthedwe gel osakaniza kutentha ndi mkulu, madzi posungira mlingo ndi mkulu;apo ayi, mlingo wosungira madzi ndi wotsika;

Pamene mamasukidwe akayendedwe a cellulose ether HPMC ukuwonjezeka, madzi posungira mlingo ukuwonjezeka;pamene mamasukidwe akayendedwe afika pamlingo wina, kuwonjezeka kwa madzi osungira madzi kumakhala kofatsa;

Kuchulukitsitsa kwa cellulose ether HPMC kuwonjezeredwa, kukwezera kuchuluka kwa madzi osungira komanso kumapangitsa kuti madzi asungidwe bwino.Pakati pa 0.25-0.6% yowonjezera, kuchuluka kwa madzi osungira madzi kumawonjezeka mofulumira ndi kuwonjezeka kwa ndalama zowonjezera;pamene kuchuluka kwa madzi kumawonjezeka, kuchuluka kwa madzi kumachepetsedwa.