Kugenzura ubuziranenge bwa hydroxypropyl methyl selulose

Nonehohydroxypropyl carboxymethyl seluloseisoko ryo kugurisha byinshi kandi byinshi, igiciro ntabwo kiringaniye, nigute wasiba vuba ubwiza bwa hydroxypropyl methyl selulose yabaye ikibazo gikomeye! Nigute ushobora gusuzuma ubuziranenge bwa hydroxypropyl methylcellulose? Ikintu cya mbere cyo kureba ni umweru wa hydroxypropyl selile; Nubwo umweru udashobora kumvikana neza niba HPMC ikwiriye gukoreshwa, ariko mugikorwa cyo gutunganya hari nabakora inganda mbi bazongeramo umweru, byangiza ubuziranenge bwayo. Ariko muri rusange, ubwinshi bwa selile nziza ether nibyiza byera.

Icya kabiri, kugirango ubone ubwiza bwa hydroxypropyl methyl selulose: hydroxypropyl carboxymethyl selulose ingana na 80-100 mesh, mesh 120 munsi, hydroxyethyl selulose HECHPMC hafi mesh 100. HPMC kuri mesh hafi 60-80, rusange methyl selulose yoroshye, gutatanya neza.

Igisubizo cya selile ether itomoye:HPMCshyira mumazi kugirango utange igisubizo kiboneye cya colloid, reba uko imyanzuro ihanitse, niko imyanzuro ihanitse, idashonga ibintu bya chimique biri hasi.

Iyo ibicuruzwa bishyushye, birahinduka cyangwa bigahuzwa hanyuma bigashonga. Ni hydrophobique kandi ikabura amazi. Beto nurufunguzo rwo guhuza no gusenya ibikoresho fatizo byamazi yihanganira amazi. Ihame ryayo rirwanya amazi ni aya akurikira: Muburyo bwo kongeramo amazi no gukurura ifu ya redxersible latx na sima, ifu ya latex ikomeza gusubira muburyo bwa emulioni yumwimerere, kandi uduce twa latx tunyanyagiye muburyo bwa sima. Isima imaze guhura n’amazi, reaction ya hydration iratangira, hanyuma igisubizo cya Ca (OH) 2 kigera ku kwiyuzuzamo no kugusha kristu, kandi mugihe kimwe, kristu ya ettringite na calcium silicate hydrate colloide ikorwa. Ibice bya Latex bishyirwa kuri gel hamwe na sima idafite amazi. Hamwe niterambere rya reaction ya hydrata, ibicuruzwa biva mumazi biriyongera, kandi latex ibice byegeranijwe buhoro buhoro mubusa bwibikoresho kama nka sima, hanyuma bigakora igiteranyo cyegeranye hejuru ya sima gel. Bitewe no kugabanuka gahoro gahoro amazi yumye, Gipfunyitse cyane byongeye gusubirwamo uduce duto twa latx muri geles hamwe nubusa byegeranye kugirango bibe firime ikomeza, ikora uruvange rwimisemburo ya sima ihuza matrike, hanyuma ugahuza paste ya sima hamwe nandi mashanyarazi.