Ni irihe tandukaniro riri hagati ya HPMC na MC

MC ni methyl selulose, iboneka mugutunganya ipamba inoze hamwe na alkali, ukoresheje methyl chloride nka agent ya etherifying, no gukora selile ya selile binyuze mubitekerezo byinshi. Mubisanzwe, urwego rwo gusimburwa ni 1.6 ~ 2.0, kandi gukemura nabyo biratandukanye hamwe nimpamyabumenyi zitandukanye. Biri muri selireose itari ionic.

(1) Kubika amazimethyl seluloseBiterwa nubunini bwiyongereye, viscosity, ingano nziza nigipimo cyo gusesa. Mubisanzwe, niba umubare winyongera ari munini, ubwiza ni buto, kandi ubwiza ni bunini, igipimo cyo gufata amazi ni kinini. Muri byo, ingano y’inyongera igira uruhare runini ku kigero cyo gufata amazi, kandi urwego rw’ubukonje ntiruhwanye n’urwego rwo gufata amazi. Igipimo cyo guseswa ahanini biterwa nurwego rwo guhindura isura ya selile ya selile hamwe nubwiza bwibice. Muri ethers ya selile yavuzwe haruguru, methyl selulose na hydroxypropyl methyl selulose bifite igipimo kinini cyo gufata amazi.

. Ifite guhuza neza na krahisi, guar gum, nibindi byinshi na surfactants. Iyo ubushyuhe bugeze ku bushyuhe bwa gelation, ibintu bya gelation bibaho.

(3) Ihinduka ry'ubushyuhe rizagira ingaruka zikomeye ku kigero cyo gufata amazi ya methyl selile. Mubisanzwe, uko ubushyuhe buri hejuru, niko gufata amazi ari bibi. Niba ubushyuhe bwa minisiteri burenze 40 ° C, kugumana amazi ya methyl selulose bizaba bibi cyane, bizagira ingaruka zikomeye kumikorere ya minisiteri.

(4) Methyl selulose igira ingaruka zikomeye kumikorere no gufatira minisiteri. “Adhesion” hano bivuga kwizirika hagati yigikoresho gisaba umukozi nu rukuta rwurukuta, ni ukuvuga kurwanya ubukana bwa minisiteri. Gufatanya ni binini, kurwanya shear ya minisiteri nini, kandi imbaraga zisabwa n'abakozi mugikorwa cyo gukoresha nazo nini, kandi kubaka minisiteri ni bibi. Methylcellulose adhesion iri murwego ruciriritse mubicuruzwa bya selile.

HPMC ni hydroxypropyl methyl selulose, ikaba ari selile ya ionic selulose ivanze ikozwe mu ipamba itunganijwe nyuma yo kuvura alkali, ikoresheje okiside ya propylene na methyl chloride nkibikoresho bya etherifingi, kandi binyuze mubitekerezo bitandukanye. Urwego rwo gusimburwa muri rusange ni 1.2 kugeza 2.0. Imiterere yacyo iratandukanye bitewe nuburinganire bwibintu bya vitxyl hamwe na hydroxypropyl.

(1) Hydroxypropyl methylcellulose irashobora gushonga byoroshye mumazi akonje, ariko izahura ningorane zo gushonga mumazi ashyushye. Ariko ubushyuhe bwacyo bwo mumazi ashyushye buri hejuru cyane ugereranije na methyl selile. Gushonga mumazi akonje nabyo biratera imbere cyane ugereranije na methyl selulose.

. Ubushyuhe nabwo bugira ingaruka ku bwenge bwabwo, uko ubushyuhe bwiyongera, ubukonje bugabanuka. Ariko ububobere bwayo ntibwatewe nubushyuhe bwo hejuru kuruta methyl selulose. Igisubizo cyacyo gihamye mububiko bwicyumba.

(3) Hydroxypropyl methylcellulose ihamye kuri aside na alkali, kandi igisubizo cyayo cyamazi kirahagaze neza murwego rwa pH = 2 ~ 12. Soda ya Caustic n'amazi ya lime ntacyo bihindura kumikorere yabyo, ariko alkali irashobora kwihutisha iseswa ryayo kandi ikongera ububobere. Hydroxypropyl methylcellulose ihamye kumunyu usanzwe, ariko iyo ubunini bwumuti wumunyu mwinshi, ubwiza bwumuti wa hydroxypropyl methylcellulose bikunda kwiyongera.

(4) Kubika amazihydroxypropyl methylcellulosebiterwa nubunini bwiyongereye, viscosity, nibindi. Igipimo cyo gufata amazi munsi yinyongera cyarenze icya methyl selulose.

. Nka alcool ya polyvinyl, ibinyamisogwe ether, amase y'imboga, nibindi.

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