Cellulose ether polymer roba ce da aka yi daga cellulose na halitta ta hanyar gyara sinadarai.Cellulose ether wani abu ne na cellulose na halitta.Samar da ether cellulose ya bambanta da polymers na roba.Mafi mahimmancin kayan sa shine cellulose, fili na polymer na halitta.Saboda ƙayyadaddun tsarin tsarin cellulose na halitta, cellulose kanta ba ta da ikon amsawa tare da ma'aikatan etherification.Duk da haka, bayan maganin kumburin wakili, haɗin gwiwar hydrogen mai karfi tsakanin sassan kwayoyin halitta da sarƙoƙi ya lalace, kuma sakin aiki na ƙungiyar hydroxyl ya zama alkali cellulose mai amsawa.Samun cellulose ether.
A cikin shirye-shiryen cakuda turmi, ƙarin adadin ether cellulose yana da ƙasa sosai, amma yana iya haɓaka aikin rigar turmi sosai, kuma babban ƙari ne wanda ke shafar aikin ginin turmi.Kyakkyawan zaɓi na ethers cellulose na nau'i daban-daban, nau'i daban-daban, nau'o'in nau'in nau'i daban-daban, nau'i daban-daban na danko da adadin da aka kara za su sami tasiri mai kyau akan inganta aikin busassun busassun turmi.A halin yanzu, yawancin masonry da plastering turmi suna da ƙarancin aikin riƙe ruwa, kuma slurry na ruwa zai rabu bayan ƴan mintuna kaɗan na tsaye.
Riƙewar ruwa muhimmin aiki ne na methyl cellulose ether, kuma yana aiki ne da yawancin masana'antun bushe-bushe na gida, musamman waɗanda ke yankunan kudu da yanayin zafi, suna kula da su.Abubuwan da ke shafar tasirin riƙon ruwa na busassun busassun turmi sun haɗa da adadin MC da aka ƙara, danko na MC, ƙarancin ƙwayoyin cuta da zazzabi na yanayin amfani.
Abubuwan da ke cikin ethers cellulose sun dogara da nau'in, lamba da rarraba abubuwan maye.Rarraba ethers cellulose kuma yana dogara ne akan nau'in maye gurbin, digiri na etherification, solubility da abubuwan aikace-aikacen da suka danganci.Dangane da nau'in maye gurbin akan sarkar kwayoyin halitta, ana iya raba shi zuwa monoether da ether mai gauraye.MC da muke yawan amfani da ita shine monoether, kuma HPMC ɗin yana hade da ether.Methyl cellulose ether MC shine samfurin bayan ƙungiyar hydroxyl akan rukunin glucose na cellulose na halitta an maye gurbinsu ta hanyar methoxy.Tsarin tsari shine [COH7O2 (OH) 3-h (OCH3) h ] x.Wani ɓangare na ƙungiyar hydroxyl akan naúrar ana maye gurbinsa da ƙungiyar methoxy, ɗayan kuma ana maye gurbinsa da ƙungiyar hydroxypropyl, tsarin tsarin shine [C6H7O2 (OH) 3-mn (OCH3) m [OCH2CH(OH) CH3] n] x Ethyl methyl cellulose ether HEMC, waɗannan su ne manyan nau'ikan da ake amfani da su kuma ana sayar dasu a kasuwa.
Dangane da solubility, ana iya raba shi zuwa ionic da wadanda ba ionic ba.Ethers cellulose masu narkewa da ruwa ba na ionic ba sun ƙunshi jerin abubuwa biyu na alkyl ethers da ethers hydroxyalkyl.Ana amfani da Ionic CMC musamman a cikin kayan wanka na roba, bugu da rini, abinci da binciken mai.Non-ionic MC, HPMC, HEMC, da dai sauransu ana amfani da su a cikin kayan gini, kayan kwalliyar latex, magani, sinadarai na yau da kullun, da dai sauransu. Ana amfani da su azaman thickener, mai riƙe ruwa, stabilizer, dispersant da wakili na samar da fim.
Riƙewar ruwa na ether cellulose: A cikin samar da kayan gini, musamman busassun turmi foda, ether cellulose yana taka rawar da ba za a iya maye gurbinsa ba, musamman a cikin samar da turmi na musamman (turmi da aka gyara), ba makawa ne kuma muhimmin sashi .Muhimmin rawar cellulose ether mai narkewa a cikin turmi galibi yana da abubuwa uku:
1. Kyakkyawan ƙarfin riƙe ruwa
2. Tasiri akan daidaiton turmi da thixotropy
3. Yin hulɗa da siminti.
Tasirin riƙewar ruwa na ether cellulose ya dogara ne akan shayar da ruwa na tushe mai tushe, abun da ke cikin turmi, kauri na turmi, buƙatar ruwa na turmi, da lokacin saitin kayan saiti.Riƙewar ruwa na ether cellulose kanta ya fito ne daga solubility da dehydration na cellulose ether kanta.Kamar yadda muka sani, duk da cewa sarkar kwayar halitta ta cellulose ta ƙunshi adadi mai yawa na ƙungiyoyin OH masu ɗorewa, ba mai narkewa cikin ruwa ba, saboda tsarin cellulose yana da babban matakin crystallinity.Ƙarfin hydration na ƙungiyoyin hydroxyl kadai bai isa ya rufe ƙaƙƙarfan haɗin hydrogen da van der Waals ba tsakanin kwayoyin halitta.Don haka sai kawai ta kumbura amma ba ta narke cikin ruwa.Lokacin da aka shigar da wanda zai maye gurbinsa a cikin sarkar kwayoyin halitta, ba kawai abin da zai maye gurbinsa yana lalata sarkar hydrogen ba, har ma da haɗin gwiwar hydrogen ɗin yana lalata saboda ƙulla abin da zai maye gurbin tsakanin sarƙoƙi da ke kusa.Girman abin da zai maye gurbin, mafi girman nisa tsakanin kwayoyin halitta.Mafi girman nisa.Mafi girman tasirin lalata haɗin gwiwar hydrogen, ether cellulose ya zama mai narkewar ruwa bayan ɗigon cellulose ya faɗaɗa kuma maganin ya shiga, yana samar da mafita mai zurfi.Lokacin da zafin jiki ya tashi, hydration na polymer ya raunana, kuma ana fitar da ruwa tsakanin sarƙoƙi.Lokacin da sakamakon rashin ruwa ya isa, kwayoyin sun fara haɗuwa, suna samar da gel ɗin tsarin cibiyar sadarwa mai girma uku kuma suna nannade waje.
Lokacin aikawa: Dec-06-2022