Yadda za a yi hukunci ingancin Hydroxypropyl Methyl Cellulose HPMC?

(1). Bambanci tsakanin adulterated hydroxypropyl methylcellulose (HPMC) da tsarki hydroxypropyl methylcellulose (HPMC)
1. Bayyanar: Pure hydroxypropyl methylcellulose HPMC ya dubi m kuma yana da ƙananan ƙananan yawa, jere daga 0.3-0.4g / ml; manya-manyan hydroxypropyl methylcellulose HPMC yana da mafi kyawun ruwa kuma yana jin nauyi, kuma akwai babban bambanci a bayyanar daga ainihin samfurin.
2. Matsayi: Pure hydroxypropyl methylcellulose HPMC foda ne fibrous a karkashin wani microscope ko girma gilashi; yayin da adulterated hydroxypropyl methylcellulose HPMC za a iya lura a matsayin granular daskararru ko lu'ulu'u a karkashin wani microscope ko kara girman gilashi.

3. Odor: Pure hydroxypropyl methylcellulose HPMC ba zai iya jin warin ammonia, sitaci da barasa; manya-manyan hydroxypropyl methylcellulose HPMC na iya jin kamshin kowane irin wari, ko da kuwa ba shi da dandano, zai ji nauyi.
4. Maganin ruwa mai ruwa: tsabtataccen hydroxypropyl methylcellulose HPMC bayani mai ruwa ya bayyana a fili, watsawar haske mai girma, yawan riƙe ruwa ≥ 97%; adulterated hydroxypropyl methylcellulose HPMC ruwa bayani ne turbid, da kuma ruwa riƙe kudi da wuya a kai 80%.

(2), riƙewar ruwa na hydroxypropyl methylcellulose HPMC, bambanta abũbuwan amfãni da rashin amfani:

Riƙewar ruwa na methyl cellulose ether a ƙarƙashin yanayin zafi mai girma alama ce mai mahimmanci don bambanta ingancin methyl cellulose ether. 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. Excellent hydroxypropyl methylcellulose HPMC kayayyakin iya yadda ya kamata warware matsalar rike ruwa karkashin high zafin jiki.

High-quality methylcellulose za a iya uniformly da kuma yadda ya kamata tarwatsa a cikin siminti 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 The hydration dauki. na kayan gelled yana tabbatar da ƙarfin haɗin gwiwa da ƙarfin matsawa na kayan. High quality-hydroxypropyl methylcellulose HPMC, da uniformity yana da kyau sosai, ta methoxy da hydroxypropoxy kungiyoyin suna a ko'ina rarraba tare da cellulose kwayoyin sarkar, shi zai iya ƙara da oxygen a kan hydroxyl da ether bonds Ikon atoms don haɗawa da ruwa don samar da hydrogen bonds. yana mai da ruwa kyauta ya zama ruwan da aka daure, ta yadda za a iya sarrafa fitar ruwa yadda ya kamata sakamakon yanayin zafi mai yawa da kuma samun rikon ruwa.
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.

(3) Rushewar hydroxypropyl methylcellulose HPMC

A cikin masana'antar gine-gine,Hydroxypropyl methylcellulose HPMCyawanci ana saka shi cikin ruwa mai tsaka tsaki, kuma samfurin HPMC yana narkar da shi kaɗai don yin hukunci akan adadin rushewar. Bayan an sanya shi a cikin ruwa mai tsaka-tsaki kadai, samfurin da ke da sauri ya taru ba tare da tarwatsawa ba samfuri ne ba tare da magani ba; bayan an sanya shi a cikin ruwa mai tsaka tsaki kadai, samfurin da zai iya tarwatsa kuma ba tare da dunƙule tare ba samfuri ne tare da maganin saman. Lokacin da surface untreated hydroxypropyl methylcellulose HPMC ke narkar da shi kadai, da guda barbashi narke cikin sauri da kuma samar da wani fim da sauri, sa ruwa ya daina shiga wasu barbashi, haifar da agglomeration da agglomeration, wanda a halin yanzu ake kira jinkirin rushewa a kasuwa samfurin.

Surface-treated hydroxypropyl methylcellulose HPMC samfurin barbashi, a tsaka tsaki ruwa, mutum barbashi za a iya tarwatsa ba tare da agglomeration, amma samfurin danko ba zai nan da nan. Bayan jiƙa na ɗan lokaci, tsarin sinadarai na jiyya na saman ya lalace, kuma ruwan zai iya narkar da ƙwayoyin HPMC. A wannan lokacin, ɓangarorin samfurin sun cika tarwatsewa kuma sun sha isasshen ruwa, don haka samfurin ba zai ƙara tsanantawa ba ko haɓaka bayan rushewa. Gudun watsawa da saurin rushewa sun dogara da matakin jiyya na saman. Idan jiyya na saman ƙasa kaɗan ne, saurin watsawa yana da ɗan jinkiri kuma saurin mannewa yana da sauri; yayin da samfurin tare da zurfin jiyya na saman yana da saurin watsawa da sauri da saurin tsayawa. Idan kuna son yin wannan jerin samfuran narke da sauri a cikin wannan yanayin, zaku iya sauke ƙaramin adadin abubuwan alkaline lokacin da aka narkar da su kaɗai. Kasuwar yanzu yawanci ana kiranta samfuran nan take. Halayen samfuran HPMC da ake bi da su sune: a cikin bayani mai ruwa, barbashi na iya tarwatsewa da juna, suna iya narkewa da sauri a cikin yanayin alkaline, kuma suna narke sannu a hankali a cikin tsaka tsaki da yanayin acidic.

Halayen hydroxypropyl methylcellulose HPMC da ba a kula da su ba sune: kwayar halitta guda ɗaya ta narke da sauri a cikin acidic, alkaline, da tsaka-tsaki, amma ba zai iya watsewa tsakanin barbashi a cikin ruwa ba, yana haifar da tari da haɓakawa. A cikin aiki na ainihi, bayan tarwatsa jiki na wannan jerin samfurori da ƙananan ƙwayoyin cuta irin su foda na roba, siminti, yashi, da dai sauransu, yawan rushewar yana da sauri sosai, kuma babu agglomeration ko agglomeration. Lokacin da ya zama dole don narkar da samfuran HPMC daban, ya kamata a yi amfani da wannan jerin samfuran tare da taka tsantsan, saboda zai haɓaka da riƙe tare. Idan ya zama dole a narkar da samfurin HPMC na hydroxypropyl methylcellulose wanda ba a kula da shi ba daban, yana buƙatar a tarwatsa shi daidai da ruwan zafi na 95 ° C, sannan a sanyaya don narkewa.

A cikin aikin samarwa na ainihi, wannan jerin samfuran galibi suna narke bayan an tarwatsa su tare da wasu ƙaƙƙarfan kayan ɓarke ​​​​a ƙarƙashin yanayin alkaline, kuma adadin narkarwarsa bai bambanta da na samfuran da ba a kula da su ba. Hakanan ya dace don amfani a cikin samfuran da aka narkar da su kaɗai, ba tare da yin burodi ko kullu ba. Za'a iya zaɓar takamaiman samfurin samfurin bisa ga ƙimar rushewar da ake buƙata ta ginin.
A lokacin aikin ginin, ko turmi siminti ne ko slurry na tushen gypsum, yawancin su tsarin tsarin alkaline ne, kuma adadin HPMC da aka ƙara yana da ƙanƙanta, wanda za'a iya watsewa a tsakanin waɗannan ƙwayoyin. Lokacin da aka ƙara ruwa, HPMC zai narke da sauri.