Kuweruza ubwino wa hydroxypropyl methyl cellulose

Tsopanohydroxypropyl carboxymethyl celluloseMsika wogulitsa ukukula, mtengo wake suli wofanana, momwe mungachotsere msanga mtundu wa hydroxypropyl methyl cellulose wakhala vuto lalikulu! Ndiye momwe mungaweruze mtundu wa hydroxypropyl methylcellulose? Choyamba choyang'ana ndi kuyera kwa hydroxypropyl cellulose; Ngakhale kuyera sikungatheke kumveka bwino ngati HPMC ndi yoyenera kugwiritsidwa ntchito, koma mu ndondomeko yokonza palinso opanga ena oipa omwe adzawonjezera choyeretsa, chomwe chidzavulaza khalidwe lake. Koma nthawi zambiri, ambiri a efa yabwino kwambiri ya cellulose ndi kuyera bwino.

Chachiwiri, kuti tiwone kusalala kwa hydroxypropyl methyl cellulose: hydroxypropyl carboxymethyl cellulose tinthu tating'onoting'ono ta 80-100 mesh, 120 mesh zochepa, hydroxyethyl cellulose HECHPMC pafupifupi 100 mesh. HPMC ya ma mesh ambiri a 60-80, methyl cellulose yofewa kwambiri, kufalikira bwino.

Yankho la kumveka bwino kwa ether ya cellulose:HPMCIkani m'madzi kuti mupange yankho lowonekera la colloid, onani ngati yankholo lili lalikulu, ndiye kuti yankholo silisungunula mankhwalawo ndi lotsika.

Zinthu zikatenthedwa, zimasungunuka mu gelatin kapena kusungunuka kenako n’kusungunukanso. Sizimalowa m’madzi ndipo zimasungunuka m’madzi. Konkire ndiye chinthu chofunikira kwambiri chomangirira ndi kuchotsa mulu wa ufa wa putty wosalowa m’madzi. Mfundo yake yosalowa m’madzi ndi iyi: Powonjezera madzi ndikusakaniza ufa wa latex ndi simenti yomwe imasungunukanso, ufa wa latex umabwerera ku mawonekedwe ake oyambirira a emulsion, ndipo tinthu ta latex timafalikira mofanana mu simenti. Simenti ikakumana ndi madzi, madzi amayamba kuyamwa, ndipo yankho la Ca (OH) 2 limafika pa saturation ndi kupanga makristalo, ndipo nthawi yomweyo, makristalo a ettringite ndi ma calcium silicate hydrate colloids amapangidwa. Tinthu ta latex timayikidwa pa gel ndi tinthu ta simenti tosalowa m’madzi. Pamene madzi akulowa m’madzi, zinthu zothira madzi zikuwonjezeka, ndipo tinthu ta latex timasonkhanitsidwa pang’onopang’ono m’malo opanda zinthu zachilengedwe monga simenti, ndikupanga wosanjikiza wozungulira pamwamba pa simenti ya gel. Chifukwa cha kuchepa pang'onopang'ono kwa madzi ouma, tinthu ta latex tomwe timasungunuka bwino m'ma gels ndi voids timapanga filimu yopitilira, kupanga chisakanizo cha phala la simenti chomwe chimalowa mkati, ndikulumikiza phala la simenti ndi zinthu zina za ufa.