Ese uzi ibijyanye na hypromellose?

Hydroxypropyl methylcellulose (izina rya INN: Hypromellose), yorohejwe kandi nka hypromellose (hydroxypropyl methylcellulose, mu magambo ahinnye nkaHPMC), ni ubwoko butandukanye bwa ether zivanze na cellulose zitari ionic. Ni polymeri ikoze muri semi-synthetic, idakora, ikoreshwa cyane nk'amavuta mu buvuzi bw'amaso, cyangwa nk'umusemburo cyangwa umusemburo mu miti inywa, kandi ikunze kuboneka mu bicuruzwa bitandukanye by'ubucuruzi.

Nk'inyongeramusaruro ku biribwa, hypromellose ishobora kugira uruhare rukurikira: emulsifier, thickener, suspending agent n'isimbuza gelatin y'inyamaswa. Kode yayo (E-code) muri Codex Alimentarius ni E464.

Imiterere y'ibinyabutabire:

Umusaruro warangiye wahydroxypropyl methylcelluloseni ifu yera cyangwa ifu yera yoroheje, kandi ingano y'uduce inyura mu kayunguruzo ka mesh 80. Igipimo cy'ingano ya methoxyl n'ingano ya hydroxypropyl y'umusaruro urangiye kiratandukanye, kandi ubushyuhe buratandukanye, bityo iba ubwoko butandukanye bufite imikorere itandukanye. Ifite imiterere yo gushonga mu mazi akonje kandi ntishonge mu mazi ashyushye nk'iya methyl cellulose, kandi gushonga kwayo mu bintu bishongesha mu binyabutabire bidasanzwe biruta iby'amazi. Ishobora gushonga muri methanoli na ethanoli idafite amazi, kandi ishobora no gushonga muri hydrocarboni ifite chlorine nka dichloro methane, trichloroethane, n'ibintu bishongesha mu binyabutabire bikomoka ku bimera nka asetone, isopropanol, na diacetone alcohol. Iyo ishongeshejwe mu mazi, izahuzwa n'utunyabutabire tw'amazi kugira ngo ikore colloid. Irakomera kuri aside na alkali, kandi ntigira ingaruka ku gipimo cya pH = 2 ~ 12. Hypromellose, nubwo idahumanya, irashya kandi ikora cyane hamwe n'ibintu bigabanya ogisijeni.

Ubushyuhe bw'ibicuruzwa bya HPMC buriyongera uko ubwiyongere bw'ibipimo n'uburemere bwa molekile bwiyongera, kandi iyo ubushyuhe buzamutse, ubushyuhe bwayo butangira kugabanuka. Iyo igeze ku bushyuhe runaka, ubushyuhe buhita bwiyongera kandi uburebure bwa. Umuti wayo w'amazi uhoraho ku bushyuhe bw'icyumba, uretse ko ushobora kwangirika na enzymes, kandi ubushyuhe bwayo muri rusange nta kintu na kimwe cyangiritse. Ifite ubushobozi bwihariye bwo gushyushya, ubushobozi bwiza bwo gukora filime n'imikorere y'ubuso.

Gukora:

Nyuma yuko selulose ivuwe na alkali, aniyoni ya alkoxy ikomoka ku gukuraho proprotonation kw'itsinda rya hydroxyl ishobora kongeramo propylene oxide kugira ngo ikore hydroxypropyl cellulose ether; ishobora kandi kwivanga na methyl chloride kugira ngo ikore methyl cellulose ether. Hydroxypropyl methylcellulose ikorwa iyo ibikorwa byombi bikorewe icyarimwe.

Gukoresha:

Ikoreshwa rya hydroxypropyl methylcellulose risa n’iry’izindi ether za cellulose. Ikoreshwa cyane cyane nk’ikintu gikwirakwiza, gihagarika, gikonjesha, gitera imbaraga, gitera imbaraga kandi gifata neza mu nzego zitandukanye. Iruta izindi ether za cellulose mu bijyanye no gushonga, gukwirakwira, kubonerana no kudakora neza kwa enzyme.

Mu nganda z'ibiribwa n'imiti, ikoreshwa nk'inyongeramusaruro. Ikoreshwa nk'umuti ufata, utera imbaraga, ugabanya ubushyuhe, ugabanya ubushyuhe n'umusemburo. Nta burozi ifite, nta gaciro k'intungamubiri ifite, kandi nta mpinduka mu mikorere y'umubiri igira.

Byongeye kandi,HPMCIfite akamaro mu gukora polimeri ya sintetike ya resin, peteroli, ibumba, gukora impapuro, uruhu, amavuta yo kwisiga, gusiga irangi, ibikoresho by'ubwubatsi n'amasahani yo gucapa ashobora kwangirika.