HPMC ni iki? MC ni iki?

HPMC ni hydroxypropyl methylcellulose, ikaba ari ether ya selulose ivanze ya ether ikozwe mu ipamba itunganijwe nyuma ya alkalisation, ikoresheje okiside ya propylene na methyl chloride nkibikoresho bya etherification, kandi binyuze mubitekerezo bitandukanye. Urwego rwo gusimbuza muri rusange ni 1.2 ~ 2.0. Imiterere yacyo iratandukanye bitewe numubare utandukanye wibintu bya mikorobe na hydroxypropyl.

MC ni methyl selulose, ikozwe muri ether ya selulose mu kuvura ipamba inoze hamwe na alkali, ikoresheje metani chloride nka agent ya etherification, kandi ikanyura mubitekerezo. Mubisanzwe, urwego rwo gusimburwa ni 1.6 ~ 2.0, kandi gukemura nabyo biratandukanye hamwe nimpamyabumenyi zitandukanye zo gusimburwa. Nibya non-ionic selulose ether.

(1) Hydroxypropyl methylcellulose irashobora gushonga byoroshye mumazi akonje, kandi izahura ningorane zo gushonga mumazi ashyushye. Ariko ubushyuhe bwacyo bwo mumazi ashyushye buri hejuru cyane ugereranije na methyl selile. Ubushyuhe bwo mumazi akonje nabwo buratera imbere cyane ugereranije na methyl selulose. 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 mubikorwa byayo, ariko alkali irashobora kwihutisha iseswa ryayo kandi ikongera ububobere bwayo. Hydroxypropyl methylcellulose ihagaze neza kumunyu usanzwe, ariko iyo ubunini bwumuti wumunyu mwinshi, ubwiza bwumuti wa hydroxypropyl methylcellulose bikunda kwiyongera.

Methylcellulose nayo irashonga mumazi akonje, kandi bizagorana gushonga mumazi ashyushye. Igisubizo cyamazi cyacyo kirahagaze neza murwego rwa pH = 3 ~ 12. Ifite guhuza neza na krahisi, guar gum, nibindi byinshi na surfactants. Iyo ubushyuhe bugeze ku bushyuhe bwa gelation, gelation iba.

. Ubushyuhe nabwo bugira ingaruka ku bwenge bwabwo, uko ubushyuhe bwiyongera, ubukonje bugabanuka. Nyamara, ubukonje bwacyo bwinshi bugira ingaruka zubushyuhe burenze methyl selile. Igisubizo cyacyo gihamye iyo kibitswe mubushyuhe bwicyumba.

Methylcellulose igira ingaruka zikomeye kumikorere no gufatira minisiteri. "Gufatanya" hano bivuga imbaraga zifatika zumvwa hagati yumukozi usaba umukozi nu rukuta, ni ukuvuga kurwanya inkovu. Kwizirika hejuru ni byinshi, kurwanya inkweto za minisiteri ni nini, kandi imbaraga zisabwa n'abakozi mu gihe cyo gukoresha nazo ni nini, kandi imikorere ya minisiteri ikennye. Methyl selile yifata iri murwego ruciriritse mubicuruzwa bya selile.

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Kugumana amazi ya methylcellulose biterwa nubwinshi bwiyongereye, ubukonje, ubwiza bwikigereranyo nigipimo cyayo. Mubisanzwe, niba umubare wongeyeho ari munini, ubwiza ni buto, kandi ubwiza ni bunini, igipimo cyo gufata amazi ni kinini. Muri byo, ingano y’inyongera igira ingaruka zikomeye ku kigero cyo gufata amazi, kandi urwego rw’ubukonje ntiruhwanye neza n’urwego rwo gufata amazi. Igipimo cyo guseswa ahanini biterwa nurwego rwo guhindura isura ya selile na selile nziza. Muri ethers ya selile yavuzwe haruguru, methyl selulose na hydroxypropyl methyl selulose bifite igipimo kinini cyo gufata amazi.

. Nka alcool ya polyvinyl, ibinyamisogwe ether, amase yimboga, nibindi. Guhuza hydroxypropyl methylcellulose mukubaka minisiteri biruta ibya methylcellulose.

Hydroxypropyl methylcelluloseHPMCifite enzyme irwanya methylcellulose, kandi igisubizo cyacyo ntigishobora guteshwa agaciro na enzymes kuruta methylcellulose.

Imihindagurikire yubushyuhe irashobora kugira ingaruka zikomeye ku 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 bizagabanuka cyane, bigira ingaruka zikomeye ku iyubakwa rya minisiteri. Iyo ubushyuhe buri hejuru, gerageza uhitemo hydroxypropyl methylcellulose.