Cellulose ether na iya inganta 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 tasiri tasirin riƙewar ruwa na busassun busassun turmi sun haɗa da adadin ƙari, danko, fineness na barbashi, da zafin jiki na yanayin amfani.
Riƙewar ruwa na ether cellulose
A cikin samar da kayan gini, musamman busassun turmi, ether cellulose yana taka rawar da ba za a iya maye gurbinsa ba, musamman wajen samar da turmi na musamman (turmi da aka gyara), wani abu ne mai mahimmanci kuma mai mahimmanci. Muhimmin rawar da ruwa mai narkewa cellulose ether a turmi yafi yana da uku al'amurran, daya ne mai kyau ruwa rike iya aiki, da sauran shi ne tasiri a kan daidaito da thixotropy na turmi, kuma na uku shi ne hulda da ciminti. 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.
Gabaɗaya magana, mafi girman danko, mafi kyawun tasirin riƙewar ruwa. Duk da haka, mafi girman danko kuma mafi girman nauyin kwayoyin halitta, daidaitaccen raguwa a cikin solubility zai yi mummunan tasiri akan ƙarfin da aikin ginin turmi. Mafi girma da danko, mafi bayyananne tasirin thickening akan turmi, amma ba daidai ba ne kai tsaye. Mafi girma da danko, da karin danko da rigar turmi zai zama, wato, a lokacin ginawa, an bayyana shi a matsayin mai mannewa ga scraper da babban mannewa ga substrate. Amma ba taimako ba ne don ƙara ƙarfin tsarin jika da kanta. A lokacin gini, aikin anti-sag ba a bayyane yake ba. Akasin haka, wasu matsakaici da ƙananan danko amma gyare-gyaren ethers na methyl cellulose suna da kyakkyawan aiki wajen inganta ƙarfin tsarin jika.
Thickening da Thixotropy na Cellulose Ether
Har ila yau, akwai kyakkyawar dangantaka ta layi tsakanin daidaituwar simintin siminti da kuma adadin ether cellulose. Cellulose ether na iya ƙara dankowar turmi sosai. Mafi girman sashi, mafi kyawun tasirin sakamako. High-danko cellulose ether ruwa bayani yana da high thixotropy, wanda kuma shi ne babban hali na cellulose ether.
Thickening ya dogara da matakin polymerization na cellulose ether, bayani maida hankali, karfi kudi, zazzabi da sauran yanayi. Kayan gelling na maganin ya keɓanta ga alkyl cellulose da abubuwan da aka gyara. Abubuwan gelation suna da alaƙa da matakin maye gurbin, ƙaddamar da bayani da ƙari. Don abubuwan da aka gyara na hydroxyalkyl, abubuwan gel ɗin kuma suna da alaƙa da canjin canjin hydroxyalkyl. Domin low danko MC da HPMC, 10% -15% bayani za a iya shirya, matsakaici danko MC da HPMC za a iya shirya 5% -10% bayani, yayin da high danko MC da HPMC iya kawai shirya 2% -3% bayani, kuma yawanci rarrabuwar danko na cellulose ether kuma an ƙididdige shi da 1% -2% bayani. Maɗaukakin nauyin ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar cuta. A cikin bayani guda ɗaya, polymers tare da ma'aunin kwayoyin halitta daban-daban suna da danko daban-daban. Babban digiri. Maƙasudin danko kawai za a iya samu ta ƙara babban adadin ƙananan nauyin kwayar halitta ether. Dankowar sa yana da ɗan dogaro akan ƙimar juzu'i, kuma babban danko ya kai ga dankowar manufa, kuma adadin adadin da ake buƙata yana da ƙarami, kuma danko ya dogara da ƙimar girma. Sabili da haka, don cimma wani daidaituwa, dole ne a ba da garantin wani adadin ether cellulose (mahimmancin bayani) da danko bayani. Gel zafin jiki na maganin kuma yana raguwa a layi tare da karuwa da ƙaddamar da maganin, da gels a dakin da zafin jiki bayan kai wani taro. Matsakaicin gelling na HPMC yana da girma sosai a zafin jiki.
Retardation na Cellulose Ether
Ayyukan na uku na ether cellulose shine jinkirta tsarin hydration na siminti. Cellulose ether yana ba da turmi tare da kaddarorin masu fa'ida iri-iri, kuma yana rage zafin farkon hydration na siminti kuma yana jinkirta aiwatar da aikin siminti mai ƙarfi. Wannan ba shi da kyau don amfani da turmi a cikin yankunan sanyi. Wannan sakamako na jinkirin yana faruwa ne ta hanyar tallan ƙwayoyin ether na cellulose akan samfuran hydration kamar CSH da ca (OH) 2. Saboda karuwa a cikin danko na maganin pore, ether cellulose yana rage motsi na ions a cikin maganin, ta haka ne jinkirta tsarin hydration. Mafi girman ƙaddamar da ether cellulose a cikin kayan gel na ma'adinai, mafi mahimmancin tasirin jinkirin hydration. Cellulose ether ba wai kawai jinkirta saiti ba, amma kuma yana jinkirta tsarin taurin tsarin siminti. Sakamakon retarding na cellulose ether ya dogara ba kawai a kan maida hankali a cikin tsarin gel ma'adinai ba, har ma a kan tsarin sinadaran. Mafi girman matakin methylation na HEMC, mafi kyawun sakamako na retarding na ether cellulose. Matsakaicin maye gurbin hydrophilic zuwa canjin haɓakar ruwa Tasirin jinkirta yana da ƙarfi. Duk da haka, danko na cellulose ether yana da ɗan tasiri akan ciminti hydration motsi.
A cikin turmi, ether cellulose yana taka rawar riƙe ruwa, kauri, jinkirta ƙarfin siminti, da haɓaka aikin gini. Kyakkyawan ƙarfin riƙe ruwa yana sa hydration na siminti ya zama cikakke, zai iya inganta dankon rigar rigar, ƙara ƙarfin haɗin gwiwa na turmi, da daidaita lokaci. Ƙara ether cellulose zuwa turmi mai fesa injina na iya inganta aikin feshi ko yin famfo da ƙarfin tsarin turmi. Sabili da haka, ana amfani da ether cellulose a ko'ina azaman ƙari mai mahimmanci a cikin turmi da aka shirya
Lokacin aikawa: Dec-26-2022