Hydroxypropyl methylcellulose (HPMC) ni eteri ya cellulose idafite ionic ikozwe muri cellulose karemano ya polymer binyuze mu buryo butandukanye bwa shimi. Ni ifu yera idafite impumuro, uburyohe kandi idahumanya igenda yiyongera ikaba umuti wa colloidal usobanutse cyangwa ufite ibicu bike mu mazi akonje. Ifite ubushobozi bwo gukurura, gufatanya, gutatanya, gukurura, gukora filime, kuyihagarika, kuyikurura, kuyisiga, kuyirinda, kuyikoresha mu buso, kuyibika mu bushyuhe no kuyirinda. Hydroxypropyl methyl cellulose na methyl cellulose bishobora gukoreshwa mu bikoresho by'ubwubatsi, mu nganda z'irangi, resin y'ubukorikori, inganda za ceramic, ubuvuzi, ibiribwa, imyenda, ubuhinzi, imiti ya buri munsi n'izindi nganda.
Ingaruka zo kubika amazi n'amahame ya hydroxypropyl methylcellulose HPMC
Selilulosi ether HPMC ahanini igira uruhare mu kubika no gukurura amazi mu gishishwa cya sima n'igishishwa gishingiye kuri gypsum, kandi ishobora kunoza neza imbaraga zihuza n'ubudahangarwa bw'igishishwa.
Ibintu nk'ubushyuhe bw'umwuka, ubushyuhe n'umuvuduko w'umuyaga bigira ingaruka ku gipimo cyo guhindagurika kw'amazi mu gikoresho cya sima n'ibikomoka kuri gypsum. Kubwibyo, mu bihe bitandukanye, hari itandukaniro mu ngaruka zo kubika amazi ku bicuruzwa bifite ingano imwe ya HPMC. Mu buryo bwihariye, ingaruka zo kubika amazi ku gikoresho zishobora guhindurwa no kongera cyangwa kugabanya ingano ya HPMC. Kubika amazi kuri eteri ya methyl cellulose mu bihe by'ubushyuhe bwinshi ni ikimenyetso cy'ingenzi cyo gutandukanya ubwiza bwa eteri ya methyl cellulose. Ibicuruzwa byiza cyane bya HPMC bishobora gukemura neza ikibazo cyo kubika amazi mu gihe cy'ubushyuhe bwinshi. Mu bihe by'ubushyuhe bwinshi, cyane cyane mu bice bishyuha kandi byumye no mu bwubatsi bw'urwego rwo hasi ku ruhande rw'izuba, HPMC nziza irakenewe kugira ngo inoze uburyo amazi abikwamo. HPMC nziza ifite uburinganire bwiza cyane. Amatsinda yayo ya methoxy na hydroxypropoxy akwirakwizwa ku buryo bungana ku muyoboro wa molekile wa cellulose, bishobora kunoza ubushobozi bwa atome za ogisijeni ku migozi ya hydroxyl na ether bwo kwihuza n'amazi kugira ngo bikore imigozi ya hydrogen. , kugira ngo amazi yigenga abe amazi ahambiriye, kugira ngo agenzure neza imyuka y'amazi iterwa n'ikirere cy'ubushyuhe bwinshi, kandi agerweho no kubika amazi menshi.
HPMC yo mu bwoko bwa cellulose nziza ishobora gukwirakwizwa mu buryo bumwe kandi neza mu byuma bya sima n'ibikomoka kuri gypsum, kandi igapfunyika uduce twose tw’ingenzi, igakora agahu ko kunywesha, ubushuhe mu gice cyo hasi bugasohoka buhoro buhoro igihe kirekire, kandi kole idakora. Uburyo bwo gutosesha ibintu byashyizwemo amazi buzatuma ibikoresho bikomera kandi bikome. Kubwibyo, mu bwubatsi bw’ubushyuhe bwinshi bw’impeshyi, kugira ngo amazi agerweho, ni ngombwa kongeramo ibicuruzwa bya HPMC byiza mu bwinshi buhagije hakurikijwe formula, bitabaye ibyo, hazabaho ubushuhe budahagije, imbaraga nke, gucikamo ibice, gupfuka no gushonga bitewe no kuma cyane. Ariko nanone byongera ingorane z’ubwubatsi ku bakozi. Uko ubushyuhe bugenda bugabanuka, ingano y’amazi HPMC yongewemo ishobora kugabanuka buhoro buhoro, kandi ingaruka imwe yo kubika amazi ishobora kugerwaho.
Uburyo amazi abikwamo hifashishijwe hydroxypropyl methylcellulose HPMC ubwayo bukunze kugirwaho ingaruka n'ibintu bikurikira:
HPMC, methoxyl na hydroxypropoxyl byakozwe ku buryo bungana birakwirakwira ku buryo bungana, kandi igipimo cyo kubika amazi kiri hejuru;
Ubushyuhe bwa gel y'ubushyuhe ya selulosi eteri ya HPMC buri hejuru, igipimo cyo kubika amazi kiri hejuru; bitabaye ibyo, igipimo cyo kubika amazi kiri hasi;
Iyo ubukana bwa ether ya cellulose HPMC bwiyongeye, igipimo cyo kubika amazi nacyo kiriyongera; iyo ubukana bugeze ku rwego runaka, ukwiyongera k'igipimo cyo kubika amazi akenshi kuba ku rugero rworoshye;
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 igipimo cyo kongeramo cyiyongera; iyo igipimo cyo kongeramo kirushaho kwiyongera, icyerekezo cyo kwiyongera k'igipimo cyo kubika amazi kiragabanuka.
Igihe cyo kohereza: Kamena-01-2023