Hydroxypropyl methyl cellulose HPMC ni ether ya cellulose idafite ionic ikozwe muri cellulose karemano ya polymer binyuze mu buryo butandukanye bwo gutunganya imiti. Ni ifu yera idafite impumuro, uburyohe kandi idahumanya ihinduka umuti wa colloidal usobanutse cyangwa utose mu mazi akonje. Ifite imiterere yo gukomera, gufatana, gukwirakwira, emulsification, imiterere ya firime, gusunika, kunyuzwamo, gusiga, gukora neza, gukora ku buso, kubika amazi no kurinda colloide. Hydroxypropyl methylcellulose ishobora gukoreshwa mu bikoresho by'ubwubatsi, mu nganda zisiga irangi, resin y'ubukorikori, inganda za ceramic, ubuvuzi, ibiribwa, imyenda, ubuhinzi, inganda za shimi za buri munsi n'izindi nganda.
Imikorere n'amahame yo kubika amazi: ether ya selulose HPMC igira uruhare mu kubika amazi no kuyagwiza mu gishishwa cya sima n'igishishwa gishingiye kuri gypsum, bishobora kunoza neza imbaraga zo gufatanya no kudakomera kw'igishishwa. Ibintu nk'ubushyuhe bw'umwuka, ubushyuhe n'umuvuduko w'umuyaga bigira ingaruka ku gipimo cyo guhinduka kw'amazi mu gishishwa cya sima n'igishishwa gishingiye kuri gypsum. Kubwibyo, mu bihe bitandukanye, hari itandukaniro mu ngaruka zo kubika amazi ku gipimo kimwe cy'ibicuruzwa bya HPMC. Mu buryo bwihariye, ingaruka zo kubika amazi mu gishishwa zishobora guhindurwa hifashishijwe kongera cyangwa kugabanya ingano ya HPMC yongewemo.
Kubika amazi muri eteri ya methyl cellulose mu gihe cy'ubushyuhe bwinshi ni ikimenyetso cy'ingenzi cyo gutandukanya ubwiza bwa eteri ya methyl cellulose. Ibikoresho byiza cyane bya HPMC bishobora gukemura neza ikibazo cyo kubika amazi mu bushyuhe bwinshi. Mu bihe by'ubushyuhe bwinshi, cyane cyane mu bice bishyuha n'ibyumye hamwe n'imiterere y'izuba rinini, HPMC nziza irakenewe kugira ngo inoze uburyo amazi abikwamo.
HPMC nziza cyane ifite uburyo bwo guhuza neza. Amatsinda yayo ya methoxy na hydroxypropoxy akwirakwira ku buryo bungana ku ruhererekane rwa molekile ya cellulose, ibi bikaba bishobora kunoza ubushobozi bwa atome za ogisijeni ku migozi ya hydroxyl na ether bwo kwihuza n'amazi kugira ngo habeho imigozi ya hydrogène. , Kugira ngo amazi yigenga ahuzwe n'amazi, bityo akagenzura neza imyuka y'amazi iterwa n'ikirere gishyushye cyane, kandi akagera ku kubika amazi menshi.
HPMC yo mu bwoko bwa cellulose nziza ishobora gukwirakwizwa mu buryo bumwe kandi neza mu gikoresho cya sima n'ibikomoka kuri gypsum, kandi igapfunyika uduce twose tw’ingenzi, maze igakora urwego rw’icyuma gitose. Amazi ari mu gice cyo hasi agenda arekurwa buhoro buhoro mu gihe kirekire. Ibikoresho bifunze bihura n’uburyo bwo gutose, kugira ngo bibe byiza ko ibikoresho bikomeza gufatana no gukomera. Kubwibyo, mu gihe cy’ubushyuhe bwinshi bw’impeshyi, kugira ngo hagerwe ku ngaruka zo kubika amazi, ibicuruzwa bya HPMC byiza bigomba kongerwamo byinshi bihagije hakurikijwe formula, bitabaye ibyo, amazi adahagije, imbaraga nke, gucikamo ibice, gupfuka no kugwa bizaterwa no kuma cyane. Ibibazo, ariko nanone byongera ingorane z’abakozi b’ubwubatsi. Uko ubushyuhe bugenda bugabanuka, ingano ya HPMC yongewemo ishobora kugabanuka buhoro buhoro, kandi ingaruka imwe yo kubika amazi ishobora kugerwaho.
Uburyo amazi abikwamo na HPMC buterwa n'ibintu bikurikira:
1. Ubumwe bwa eteri ya selulose HPMC
Muri HPMC ifite uburyo bumwe bwo gusubiza ibintu, amatsinda ya methoxy na hydroxypropoxy arakwirakwira ku buryo bungana, kandi igipimo cyo kubika amazi kiri hejuru.
2. Ubushyuhe bwa gel y'ubushyuhe ya eteri ya selulose HPMC
Ubushyuhe bwa gel y'ubushyuhe buri hejuru, igipimo cyo kubika amazi kiri hejuru; ahubwo igipimo cyo kubika amazi kiri hasi.
3. Ubukana bwa eteri ya selulose HPMC
Iyo ubushyuhe bwa HPMC bwiyongereye, igipimo cyo kubika amazi nacyo kiriyongera; iyo ubushyuhe bugeze ku rwego runaka, ukwiyongera k'igipimo cyo kubika amazi kiba kitaringaniye.
4. Kongeramo eteri ya selulose HPMC
Uko ingano ya ether ya cellulose HPMC yongerwaho ari nyinshi, ni ko igipimo cyo kubika amazi kiba kinini kandi ingaruka zo kubika amazi zirushaho kuba nziza. Mu rugero rwa 0.25-0.6%, igipimo cyo kubika amazi kiriyongera vuba uko umubare w’inyongera wiyongera; iyo umubare w’inyongera wiyongera, icyerekezo cyo kubika amazi kigenda kigabanuka.
Igihe cyo kohereza: Ukuboza 16-2021