Hydroxypropyl methylcellulose (HPMC) wani nau'in cellulose ne wanda ba ionic ba wanda aka yi shi da cellulose na halitta ta hanyar jerin hanyoyin sinadarai. Su fari ne mara ƙamshi, mara ɗanɗano kuma mara guba wanda ke kumbura zuwa wani bayani mai haske ko ɗan gajimare na colloidal a cikin ruwan sanyi. Yana da kauri, ɗaurewa, warwatsewa, emulsifying, samar da fim, dakatarwa, shawa, gelling, aiki a saman, riƙe danshi da kuma kariya daga colloid. Ana iya amfani da Hydroxypropyl methyl cellulose da methyl cellulose a cikin kayan gini, masana'antar fenti, resin roba, masana'antar yumbu, magani, abinci, yadi, noma, sinadarai na yau da kullun da sauran masana'antu.
Tasirin riƙe ruwa da ƙa'idar hydroxypropyl methylcellulose HPMC
Cellulose ether HPMC galibi tana taka rawar riƙe ruwa da kauri a cikin turmi na siminti da slurry mai tushen gypsum, kuma tana iya inganta ƙarfin haɗin kai da juriyar sag na slurry yadda ya kamata.
Abubuwa kamar zafin iska, zafin jiki da saurin matsin iska za su shafi saurin raguwar ruwa a cikin turmi da samfuran da aka yi da siminti. Saboda haka, a cikin yanayi daban-daban, akwai wasu bambance-bambance a cikin tasirin riƙe ruwa na samfuran tare da adadin HPMC iri ɗaya da aka ƙara. A cikin takamaiman ginin, ana iya daidaita tasirin riƙe ruwa na slurry ta hanyar ƙara ko rage adadin HPMC da aka ƙara. Rike ruwa na methyl cellulose ether a ƙarƙashin yanayin zafi mai girma muhimmin alama ne don bambanta ingancin methyl cellulose ether. Kyawawan samfuran jerin HPMC na iya magance matsalar riƙe ruwa yadda ya kamata a ƙarƙashin zafin jiki mai yawa. A cikin yanayi mai zafi da bushewa da kuma gina sirara a gefen rana, ana buƙatar HPMC mai inganci don inganta riƙe ruwa na slurry. HPMC mai inganci yana da daidaito mai kyau. Rukunin methoxy da hydroxypropoxy suna rarraba daidai tare da sarkar ƙwayoyin cellulose, wanda zai iya inganta ikon atom ɗin oxygen akan haɗin hydroxyl da ether don haɗawa da ruwa don samar da haɗin hydrogen. , ta yadda ruwa mai 'yanci zai zama ruwa da aka ɗaure, don a iya sarrafa fitar da ruwa da yanayin zafi mai yawa ke haifarwa yadda ya kamata, da kuma cimma riƙe ruwa mai yawa.
Ana iya watsa HPMC mai inganci a cikin turmi na siminti da samfuran gypsum, sannan a naɗe dukkan barbashi masu ƙarfi, sannan a samar da fim ɗin jika, danshi a cikin tushe yana fitowa a hankali na dogon lokaci, kuma manne mara tsari. Haɓaka ruwan da ke cikin kayan da aka haɗa zai tabbatar da ƙarfin haɗin gwiwa da ƙarfin matsewa na kayan. Saboda haka, a cikin ginin bazara mai zafi, don cimma tasirin riƙe ruwa, ya zama dole a ƙara samfuran HPMC masu inganci a cikin isassun yawa bisa ga dabarar, in ba haka ba, za a sami ƙarancin ruwa, raguwar ƙarfi, fashewa, rami da zubar da ruwa sakamakon bushewa da yawa, amma kuma yana ƙara wahalar gini ga ma'aikata. Yayin da zafin jiki ke raguwa, adadin ruwan da aka ƙara na HPMC za a iya rage shi a hankali, kuma ana iya cimma irin wannan tasirin riƙe ruwa.
Rike ruwa na samfurin hydroxypropyl methylcellulose HPMC da kansa yakan faru ne sakamakon waɗannan abubuwan:
HPMC, methoxyl da hydroxypropoxyl waɗanda aka mayar da martani daidai gwargwado suna rarraba daidai gwargwado, kuma yawan riƙe ruwa yana da yawa;
Zafin gel ɗin zafi na Cellulose ether HPMC yana da yawa, ƙimar riƙe ruwa yana da yawa; in ba haka ba, ƙimar riƙe ruwa yana da ƙasa;
Idan ɗanɗanon cellulose ether HPMC ya ƙaru, ƙimar riƙe ruwa ma tana ƙaruwa; idan ɗanɗanon ya kai wani mataki, ƙaruwar ƙimar riƙe ruwa yakan yi laushi;
Da yawan sinadarin cellulose ether HPMC da aka ƙara, haka nan yawan sinadarin riƙe ruwa da kuma tasirin riƙe ruwa ya fi kyau. A cikin adadin 0.25-0.6%, yawan riƙe ruwa yana ƙaruwa da sauri tare da ƙaruwar adadin ƙarin; lokacin da adadin ƙarin ya ƙara ƙaruwa, yanayin ƙaruwar riƙe ruwa yana raguwa.
Lokacin Saƙo: Yuni-01-2023