Matsayi da ka'idar riƙewar ruwa na hydroxypropyl methylcellulose HPMC

Hydroxypropyl methylcellulose (HPMC) wani ether ne wanda ba na ionic cellulose ba wanda aka yi daga cellulose polymer abu na halitta ta hanyar tsarin sinadarai. Farin foda ne mara wari, mara ɗanɗano kuma mara guba wanda ke kumbura zuwa cikin bayani koloidal bayyananne ko dan kadan a cikin ruwan sanyi. Yana da thickening, dauri, dispersing, emulsifying, film-forming, suspending, adsorbing, gelling, surface aiki, danshi-retaining da m colloid Properties. Ana iya amfani da Hydroxypropyl methylcellulose da methylcellulose a cikin kayan gini, masana'antar fenti, resin roba, masana'antar yumbu, magani, abinci, yadi, aikin gona, sinadarai na yau da kullun da sauran masana'antu.

Hydroxypropyl methylcellulose HPMC lissafin sunadarai:
[C6H7O2 (OH) 3-mn (OCH3) m (OCH2CH (OH) CH3) n] x

Sakamakon riƙewar ruwa da ka'idar hydroxypropyl methylcellulose HPMC:
Cellulose ether HPMCyafi taka rawa na riƙe ruwa da kauri a cikin siminti turmi da gypsum tushen slurry, da kuma iya yadda ya kamata inganta hadin gwiwa karfi da sag juriya na slurry.

Abubuwa kamar zafin iska, zafin jiki da saurin matsa lamba na iska za su yi tasiri ga yawan canjin ruwa a cikin turmi siminti da samfuran tushen gypsum. Sabili da haka, a cikin yanayi daban-daban, akwai wasu bambance-bambance a cikin tasirin riƙewar ruwa na samfuran tare da adadin adadin HPMC da aka ƙara. A cikin ƙayyadaddun ginin, ana iya daidaita tasirin riƙe ruwa na slurry ta ƙara ko rage adadin adadin HPMC da aka ƙara. Riƙewar ruwa na methyl cellulose ether a ƙarƙashin yanayin zafi mai girma alama ce mai mahimmanci don bambanta ingancin methyl cellulose ether. Mafi kyawun samfuran samfuran HPMC na iya magance matsalar riƙewar ruwa a ƙarƙashin babban zafin jiki. A cikin yanayin zafi mai zafi, musamman a wurare masu zafi da bushewa da kuma gine-gine na bakin ciki a gefen rana, ana buƙatar HPMC mai inganci don inganta riƙe ruwa na slurry. HPMC mai inganci yana da daidaitattun daidaito. Ƙungiyoyin methoxyl da hydroxypropoxyl suna rarraba daidai gwargwado tare da sarkar kwayar halitta ta cellulose, wanda zai iya inganta ikon atom na oxygen akan hydroxyl da ether bond don haɗuwa da ruwa don samar da haɗin gwiwar hydrogen. , ta yadda ruwan 'yanci ya zama ruwan daure, ta yadda za a iya sarrafa fitar da ruwa yadda ya kamata sakamakon yanayin zafi mai yawa, da kuma cimma ruwa mai yawa.

High quality-cellulose HPMC za a iya uniformly kuma yadda ya kamata tarwatsa a cikin sumunti turmi da gypsum na tushen kayayyakin, da kuma kunsa duk m barbashi, da kuma samar da wani wetting fim, da danshi a cikin tushe ne sannu a hankali saki na dogon lokaci, da inorganic manne The. Halin hydration na kayan da aka hade zai tabbatar da ƙarfin haɗin gwiwa da ƙarfin matsawa na kayan. Sabili da haka, a cikin ginin zafi mai zafi, don cimma tasirin riƙewar ruwa, dole ne a ƙara samfurori masu inganci na HPMC a cikin adadi mai yawa bisa ga ma'auni, in ba haka ba, za a sami rashin isasshen ruwa, rage ƙarfi, fashewa, hollowing. da zubar da ruwa mai yawa sakamakon bushewa. matsaloli, amma kuma yana ƙara wahalar gini na ma'aikata. Yayin da zafin jiki ya ragu, adadin ruwan HPMC da aka kara za a iya ragewa a hankali, kuma ana iya samun irin wannan tasirin ruwa.

Riƙewar ruwa na hydroxypropyl methylcellulose samfurin HPMC da kansa yana shafar abubuwa masu zuwa:

1. Uniformity na cellulose ether HPMC
HPMC da aka mayar da martani akai-akai, metoxyl da hydroxypropoxyl ana rarraba su daidai gwargwado, kuma yawan riƙe ruwa yana da yawa.

2. Cellulose ether HPMC thermal gel zazzabi
Mafi girman zafin jiki na thermal gel, mafi girman adadin riƙewar ruwa; in ba haka ba, ƙananan yawan ajiyar ruwa.

3. Cellulose Ether HPMC Danko
Lokacin da danko na HPMC ya karu, yawan ajiyar ruwa kuma yana ƙaruwa; lokacin da danko ya kai wani matakin, haɓakar yawan riƙe ruwa yakan zama mai laushi.

4. Ƙara adadin cellulose ether HPMC
Mafi girman adadin cellulose ether HPMC da aka kara, mafi girman yawan adadin ruwa kuma mafi kyawun tasirin ruwa. A cikin kewayon 0.25-0.6% ƙari, yawan riƙewar ruwa yana ƙaruwa da sauri tare da karuwar adadin adadin; lokacin da adadin adadin ya ƙara ƙaruwa, haɓakar haɓakar yanayin riƙe ruwa yana raguwa.