Hydroxypropyl methyl cellulose HPMC wani nau'in cellulose ne wanda ba ionic ba wanda aka yi shi da cellulose na halitta ta hanyar jerin sarrafa sinadarai. Su fari ne mara ƙamshi, mara ɗanɗano kuma mara guba wanda ke kumbura zuwa wani bayani mai haske ko ɗan tururi a cikin ruwan sanyi. Yana da halaye na kauri, haɗawa, warwatsewa, emulsification, ƙirƙirar fim, dakatarwa, shawa, gelation, aikin saman, riƙe danshi da kuma colloid mai kariya. Ana iya amfani da Hydroxypropyl methylcellulose a cikin kayan gini, masana'antar rufi, resin roba, masana'antar yumbu, magani, abinci, yadi, noma, masana'antar sinadarai ta yau da kullun da sauran masana'antu.
Aikin riƙe ruwa da ƙa'ida: cellulose ether HPMC galibi yana taka rawa wajen riƙe ruwa da kauri a cikin turmi na siminti da slurry mai tushen gypsum, wanda zai iya inganta ƙarfin haɗin kai da juriyar sagging na slurry yadda ya kamata. Abubuwa kamar zafin iska, zafin jiki da saurin matsin iska za su shafi ƙimar volatilization na ruwa a cikin turmi na siminti da samfuran da aka yi da gypsum. Saboda haka, a cikin yanayi daban-daban, akwai wasu bambance-bambance a cikin tasirin riƙe ruwa na adadin samfuran HPMC iri ɗaya. 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 yawa muhimmin alama ne don bambanta ingancin methyl cellulose ether. Samfuran HPMC masu kyau na iya magance matsalar riƙe ruwa yadda ya kamata a yanayin zafi mai yawa. A cikin yanayi mai zafi, musamman a wurare masu 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 ɗinsa suna rarraba daidai gwargwado 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 haka ruwan kyauta zai zama ruwa mai ɗaure, ta haka ne zai sarrafa ƙafewar ruwa da yanayin zafi mai yawa ke haifarwa, da kuma cimma riƙewar ruwa mai yawa.
Ana iya watsa HPMC mai inganci a cikin turmi na siminti da samfuran da aka yi da gypsum, sannan a naɗe dukkan ƙwayoyin halitta masu ƙarfi, sannan a samar da wani Layer na fim ɗin jika. Ruwan da ke cikin tushe yana fitowa a hankali cikin dogon lokaci. Kayan da aka tattara yana shan iska, don tabbatar da ƙarfin haɗin kai da ƙarfin matsewa na kayan. Saboda haka, a cikin ginin bazara mai zafi, domin cimma tasirin riƙe ruwa, dole ne a ƙara samfuran HPMC masu inganci a adadi mai yawa bisa ga dabarar, in ba haka ba, rashin isasshen ruwa, raguwar ƙarfi, fashewa, rami da faɗuwa za su faru saboda bushewar da ta wuce gona da iri. Matsaloli, amma kuma suna ƙara wahalar ma'aikatan gini. Yayin da zafin jiki ke raguwa, ana iya rage adadin HPMC da aka ƙara a hankali, kuma ana iya cimma irin wannan tasirin riƙe ruwa.
Rike ruwa na HPMC yana shafar waɗannan abubuwan:
1. Daidaiton cellulose ether HPMC
A cikin HPMC da aka yi daidai, ƙungiyoyin methoxy da hydroxypropoxy suna rarraba daidai gwargwado, kuma yawan riƙe ruwa yana da yawa.
2. Zafin gel mai zafi na cellulose ether HPMC
Zafin gel ɗin zafi yana da yawa, ƙimar riƙe ruwa yana da yawa; akasin haka, ƙimar riƙe ruwa yana da ƙasa.
3. Danko na cellulose ether HPMC
Idan danko na HPMC ya ƙaru, adadin riƙe ruwa shima yana ƙaruwa; idan danko ya kai wani matsayi, ƙaruwar adadin riƙe ruwa yakan yi ƙasa sosai.
4. Ƙara cellulose ether HPMC
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, ƙaruwar saurin riƙe ruwa yana raguwa.
Lokacin Saƙo: Disamba-16-2021