Urebye ubuziranenge bwa hydroxypropyl methylcellulose

Noneho ko hari amasoko menshi kandi menshi ya hydroxypropyl carboxymethyl selulose kandi ibiciro ntibingana, uburyo bwo kumenya byoroshye kandi byihuse ubwiza bwa hydroxypropyl carboxymethyl selulose byabaye ikibazo gikomeye! Nigute ushobora gusuzuma ubuziranenge bwa hydroxypropyl methylcellulose? Ikintu cya mbere cyo kureba ni umweru wa hydroxypropyl selile; nubwo umweru udashobora kumenya niba HPMC ikwiriye gukoreshwa, bamwe mubakora inganda zititonda bazongeramo umweru mugihe cyo gutunganya, bizagira ingaruka kumiterere yabyo. Ariko muri rusange, ibyinshi muri selile nziza ya selile bifite umweru mwiza.

Icya kabiri, biterwa nubwiza bwa hydroxypropyl methylcellulose: ingano yubunini bwa hydroxypropyl carboxymethyl selulose ni mesh 80-100, munsi ya mesh 120, na hydroxyethyl selulose HECHPMC ni mesh 100. Hafi ya hpmc ni mesh 60-80. Mubisanzwe, yoroshye methyl selulose, nibyiza gutatanya.

Ubusobanuro bwa ether ya selile mubisubizo: shyira HPMC mumazi kugirango itange igisubizo kiboneye cya colloidal, uko bisobanutse neza, niko bisobanuka neza, niko ibintu bitangirika.

Iyo ibicuruzwa bishyushye, biraza cyangwa ibidengeri hanyuma bigashonga. Ni hydrophobique kandi irashonga. Beto nurufunguzo rwo guhuza no gusenya ibikoresho fatizo byifu yamazi yihanganira amazi. Ihame ryo kurwanya amazi ni aya akurikira: mugihe ifu ya redxersible latx na sima ivanze namazi, ifu ya latex izakomeza gusubira muburyo bwa emulioni yumwimerere, naho uduce twa latex Dutatanye neza muri sima. Isima imaze guhura namazi, reaction ya hydration iratangira, kandi igisubizo cya Ca (OH) 2 kigera kubwuzuye kandi kristu ziragwa. Muri icyo gihe, kristu ya ettringite na calcium silicate hydrate colloide irashingwa, hanyuma uduce duto twa latex dushyirwa kuri gel hamwe nuduce twa sima idafite amazi, nkuko reaction ya hydrata igenda ikomeza, ibicuruzwa biva mu mazi bikomeza kwiyongera, hamwe na latx buhoro buhoro kusanyiriza mu cyuho cyibikoresho kama nka sima, hanyuma ukore igipande cyuzuye hejuru yubutaka bwa sima. , kubera kugabanuka gahoro gahoro yubushyuhe bwumutse, bipfunyitse byegeranye byongeye gutondekanya uduce duto twa latx muri gel hamwe nubusa bifatanyiriza hamwe gukora firime ikomeza, ikora imvange hamwe na matrisa ihuza materi ya sima, hanyuma ikora paste ya sima nizindi fu Igiteranyo bifatanye.