Focus on Cellulose ethers

Yaya ake yin methylcellulose?

Da fari dai, ana murƙushe ɓangarorin itacen da aka ƙera auduga/tataccen auduga, sannan a jefar da shi kuma a juye a ƙarƙashin aikin soda. Ƙara olefin oxide (kamar ethylene oxide ko propylene oxide) da methyl chloride don etherification. A ƙarshe, ana yin wankan ruwa da tsarkakewa don samun farinmethylcellulosefoda. Wannan foda, musamman maganinta na ruwa, yana da kaddarorin jiki masu ban sha'awa. Eter cellulose da ake amfani da shi a masana'antar gine-gine shine methyl hydroxyethyl cellulose ether ko methyl hydroxypropyl cellulose (ana nufin MHEC ko MHPC, ko kuma mafi sauƙaƙan suna MC). Wannan samfurin yana taka muhimmiyar rawa a fagen busasshen turmi foda. muhimmiyar rawa.

 

Menene riƙewar ruwa na methyl cellulose ether (MC)?

Amsa: Matsayin riƙe ruwa yana ɗaya daga cikin mahimman bayanai don auna ingancin methyl cellulose ether, musamman ma a cikin bakin bakin ciki na ginin siminti da turmi na tushen gypsum. Ingantattun riƙon ruwa na iya hana al'amarin na asarar ƙarfi da fashewa ta hanyar bushewa da yawa da rashin isasshen ruwa. Kyakkyawan riƙewar ruwa na methyl cellulose ether a ƙarƙashin yanayin zafi mai zafi yana ɗaya daga cikin mahimman alamomi don bambanta aikin methyl cellulose ether. A ƙarƙashin yanayi na al'ada, riƙewar ruwa na yawancin methyl cellulose ethers yana raguwa tare da karuwar zafin jiki. Lokacin da yawan zafin jiki ya tashi zuwa 40 ° C, yawan ruwa na methyl cellulose ethers na kowa yana raguwa sosai, wanda yake da mahimmanci a wurare masu zafi da bushe. Kuma gina jiki na bakin ciki a gefen rana a lokacin rani zai yi tasiri mai tsanani. Duk da haka, yin sama don rashin riƙewar ruwa ta hanyar babban sashi zai haifar da babban danko na kayan aiki saboda yawan adadin, wanda zai haifar da rashin jin daɗi ga ginin.

Riƙewar ruwa yana da matukar mahimmanci don haɓaka tsarin taurin tsarin gelling ma'adinai. A karkashin aikin ether cellulose, an saki danshi a hankali zuwa tushe ko iska a cikin dogon lokaci, don haka tabbatar da cewa siminti (ciminti ko gypsum) yana da isasshen lokaci don yin hulɗa da ruwa kuma a hankali ya taurare.

 

Menene aikin methyl cellulose ether a bushe foda turmi?

Methyl hydroxyethyl cellulose ether (MHEC) da methyl hydroxypropyl cellulose ether (HPMC) ana kiransa gaba ɗaya azaman ether methyl cellulose.

A fagen busasshen turmi foda, methyl cellulose ether muhimmin abu ne da aka gyara don busassun turmi irin su plastering turmi, gypsum plastering, tile m, putty, matakin kai, turmi mai feshi, manne fuskar bangon waya da kayan caulking. A daban-daban busassun turmi foda, methyl cellulose ether yafi taka rawar da ruwa rike da thickening.


Lokacin aikawa: Janairu-09-2023
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