Momwe mungasankhire hydroxypropyl methylcellulose pakusunga madzi

Kusungidwa kwa madzi kuchokera ku hydroxypropyl methylcellulose ndi chimodzi mwazinthu zofunika kwambiri za hydroxypropyl methylcellulose. 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 kofanana kwa hydroxypropyl methylcellulose.

Nthawi zambiri, kukwezeka kwa mamasukidwe a hydroxypropyl methylcellulose kumapangitsa kuti madzi asungidwe bwino, koma zotsatira za mamasukidwe akayendedwe pakusunga madzi zidzachepetsedwa pamene mamasukidwe akayendedwe amapitilira 100,000 mpa.s. Kwa hydroxypropyl methylcellulose yokhala ndi mamasukidwe opitilira 100,000, ndikofunikira kuwonjezera kuchuluka kwa hydroxypropyl methylcellulose kuti muwonjezere kuchuluka kwa kusunga madzi.

Pakumanga kwenikweni, mphamvu yosungira madzi ya slurry imatha kusinthidwa ndikuwonjezera kapena kuchepetsa kuchuluka kwa hydroxypropyl methylcellulose. Mankhwala a Hydroxypropyl methylcellulose amatha kuthetsa vuto la kusunga madzi kutentha kwambiri. M'nyengo yotentha kwambiri, makamaka m'madera otentha ndi owuma komanso zomangamanga zowonda kumbali yadzuwa, hydroxypropyl methylcellulose yapamwamba imafunika kuti madzi asungidwe bwino.

Wapamwamba kwambiri wa hydroxypropyl methylcellulose ali ndi mawonekedwe abwino kwambiri. Magulu ake a methoxyl ndi hydroxypropoxyl amagawidwa mofanana pamagulu a cellulose. Ikhoza kusintha maatomu a okosijeni pa hydroxyl ndi ether bond. Kutha kwa mayanjano amadzi kuti apange ma hydrogen bond amasintha madzi aulere kukhala madzi omangika, motero amawongolera bwino kutuluka kwa madzi chifukwa cha nyengo yotentha kwambiri ndikusunga madzi ambiri.

Apamwamba hydroxypropyl methylcellulose akhoza wogawana ndi mogwira kumwazikana mu matope matope ndi gypsum ofotokoza, kukulunga particles onse olimba, ndi kupanga lonyowa filimu, ndi chinyezi m'munsi adzamasulidwa pang'onopang'ono kwa nthawi yaitali. A hydration reaction zimachitika ndi inorganic gelling zakuthupi, potero kuonetsetsa mphamvu ya mgwirizano ndi mphamvu yopondereza ya zinthuzo. Chifukwa chake, pakumanga kotentha kwambiri kwachilimwe, kuti mukwaniritse kusungirako madzi, ndikofunikira kuwonjezera zinthu zapamwamba kwambiri za hydroxypropyl methylcellulose mokwanira molingana ndi chilinganizo, apo ayi, kuchepa kwamadzi, kuchepa mphamvu, ndi kusweka kudzachitika chifukwa. kuyanika kwambiri. Mavuto abwino monga kugwetsa, kugwetsa ndi kugwa kumawonjezeranso zovuta zomanga kwa ogwira ntchito. Pamene kutentha kumatsika, kuchuluka kwa hydroxypropyl methylcellulose kungathe kuchepetsedwa pang'onopang'ono, ndipo zotsatira zofanana zosungira madzi zimatha kutheka.