Momwe mungasinthire kusungidwa kwamadzi kwa hydroxypropyl methylcellulose

Hydroxypropyl methylcellulose ndizomwe zimagwiritsidwa ntchito kwambiri mumatope a ufa wouma. Cellulose ether imagwira ntchito yofunika kwambiri mumatope a ufa wowuma. Pambuyo pa ether ya cellulose mumatope itasungunuka, ntchito yapamwamba imatsimikizira kuti zinthu za simenti ndizogawidwa bwino, ndipo cellulose ether, monga colloid yoteteza, "zimangirira" tinthu tating'onoting'ono ndipo timapanga filimu yopangira mafuta kunja kwake. pamwamba, kupanga dongosolo la matope kukhala lokhazikika ndikuwongolera kutuluka kwa matope panthawi yosakaniza katundu ndi kusalala kwa zomangamanga.

Hydroxypropyl methylcellulose HPMC ili ndi madzi osungira bwino kwambiri, omwe angalepheretse chinyezi mumatope kuti asatuluke msanga kapena kutengeka ndi gawo la pansi, kuonetsetsa kuti simentiyo imakhala ndi madzi okwanira, potsiriza kuonetsetsa kuti makina amatope, omwe ndi opindulitsa kwambiri. towonda zigawo Tondo ndi kuyamwa m'munsi kapena matope ntchito pa kutentha ndi youma zinthu. Mphamvu yosungira madzi ya hydroxypropyl methylcellulose ether imatha kusintha kamangidwe kakale ndikupititsa patsogolo ntchito yomanga. Mwachitsanzo, kumanga pulasitala kumatha kuchitidwa pazigawo zomwe zimayamwa madzi popanda kunyowetsa.

Kukhuthala, mlingo, kutentha kozungulira komanso kapangidwe ka maselo a hydroxypropyl methylcellulose HPMC zimakhudza kwambiri ntchito yake yosunga madzi. Pansi pazikhalidwe zomwezo, kukulirakulira kwa kukhuthala kwa cellulose ether, ndikokwanira kusunga madzi; Kuchuluka kwa mlingo, kumapangitsa kuti madzi asungidwe bwino. Nthawi zambiri, kachulukidwe kakang'ono ka cellulose ether kumatha kusintha kwambiri kusungidwa kwamadzi mumatope. Mlingo ukafika pamlingo wina Pamene digiriyo ili yokwera, kuchuluka kwa madzi osungirako kumawonjezeka pang'onopang'ono; kutentha kozungulira kumakwera, kusunga madzi kwa cellulose ether kumachepa, koma ma ether ena osinthidwa a cellulose amakhalanso ndi madzi osungira bwino pansi pa kutentha kwambiri; mapadi okhala ndi digiri yotsika yolowa m'malo Etere amasunga madzi bwino.

Gulu la hydroxyl pa molekyulu ya HPMC ndi atomu ya okosijeni pa mgwirizano wa ether udzagwirizana ndi molekyulu yamadzi kuti apange mgwirizano wa haidrojeni, kutembenuza madzi aulere kukhala madzi omangika, motero amasewera bwino posungira madzi; mamolekyu amadzi ndi mapadi Kuphatikizika pakati pa unyolo wa ether molekyulu kumathandizira kuti mamolekyu amadzi alowe mkati mwa unyolo waukulu wa cellulose ether ndipo amakhala ndi mphamvu zomangira zamphamvu, motero amapanga madzi aulere ndi madzi omangika, zomwe zimapangitsa kuti madzi azikhala ndi matope; cellulose ether imapangitsa kuti madzi asungidwe mwatsopano osakanikirana The rheological properties, porous network structure ndi osmotic pressure ya simenti phala kapena filimu kupanga katundu wa mapadi ether amalepheretsa kufalikira kwa madzi. Komabe, chifukwa cha kusagwira bwino kwa madzi osungiramo madzi a cellulose ether yomwe ilipo panopa, matope amakhala ndi mgwirizano wochepa komanso wosagwira bwino ntchito yomanga, ndipo matope amatha kusweka, kukumba ndi kugwa pambuyo pomanga.