Ingancin cellulose hpmc yana ƙayyade ingancin turmi

A cikin bushe-bushe turmi, ƙarin adadin hydroxypropyl methylcellulose HPMC yana da ƙasa sosai, amma yana iya inganta aikin rigar turmi sosai, kuma babban ƙari ne wanda ke shafar aikin ginin turmi. Cellulose ethers tare da digiri daban-daban na danko da ƙari suna da tasiri mai kyau akan 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 ruwa na busassun busassun turmi sun hada da adadin HPMC da aka kara, da danko na HPMC, da kyau na barbashi da zafin jiki na yanayin amfani.

1. Ra'ayi: Cellulose ether shine polymer roba wanda aka yi daga cellulose na halitta ta hanyar gyare-gyaren 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. Koyaya, bayan maganin kumburin wakili, haɗin gwiwar hydrogen mai ƙarfi tsakanin sarƙoƙi na ƙwayoyin cuta da sarƙoƙi sun lalace, kuma sakin aiki na ƙungiyar hydroxyl ya zama alkali cellulose mai amsawa. Samun cellulose ether. 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. HPMC da muke amfani da ita shine gauraye ether. Hydroxypropyl methylcellulose ether HPMC samfur ne da aka samu ta musanya wani ɓangare na ƙungiyar hydroxyl akan rukunin tare da ƙungiyar methoxy da wani ɓangaren tare da ƙungiyar hydroxypropyl. Tsarin tsari shine [C6H7O2(OH)3-mn(OCH3)m[OCH2CH(OH)) CH3] n] x

Ana amfani da HPMC galibi a cikin kayan gini, kayan kwalliyar latex, magani, sinadarai na yau da kullun, da sauransu. Ana amfani da shi azaman mai kauri, wakili mai riƙe ruwa, stabilizer, dispersant da wakilin ƙirƙirar fim.

2. 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), yana da 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. Abubuwan da suka shafi riƙewar ruwa na turmi sun haɗa da danko na ether cellulose, adadin da aka kara, da kyau na barbashi da yawan zafin jiki na amfani. Mafi girman danko na ether cellulose, mafi kyawun aikin riƙe ruwa. Gabaɗaya magana, mafi girman danko, mafi kyawun tasirin riƙewar ruwa. 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. Mafi girman adadin ether cellulose da aka ƙara zuwa turmi, mafi kyawun aikin riƙewar ruwa, kuma mafi girman danko, mafi kyawun aikin riƙewar ruwa. Game da girman barbashi, mafi kyawun barbashi, mafi kyawun riƙon ruwa. Bayan manyan barbashi na cellulose ether sun hadu da ruwa, nan da nan saman ya narke kuma ya samar da gel don kunsa kayan don hana kwayoyin ruwa daga ci gaba da shiga. Wani lokaci ba za a iya tarwatsewa da narkar da shi daidai ba ko da bayan dogon lokaci yana motsawa, yana samar da maganin flocculent mai hazo ko agglomeration. Yana tasiri sosai akan riƙe ruwa na ether cellulose, kuma solubility yana ɗaya daga cikin abubuwan da za a zabi ether cellulose. Fineness kuma muhimmin ma'aunin aiki ne na methyl cellulose ether. Ana buƙatar HPMC da aka yi amfani da shi don busassun busassun turmi don zama foda, tare da ƙananan abun ciki na ruwa, kuma fineness kuma yana buƙatar 20% ~ 60% na girman barbashi ya zama ƙasa da 63um. Rashin lafiya yana rinjayar solubility na methyl cellulose ether. Mc mai laushi yawanci granular ne, kuma yana da sauƙi a narke cikin ruwa ba tare da haɓaka ba, amma yawan narkewa yana da jinkirin gaske, don haka bai dace da amfani da busassun busassun turmi ba. A cikin busassun busassun turmi, MC yana tarwatse a tsakanin kayan siminti kamar tara, filler mai kyau da siminti, kuma isasshen foda kawai zai iya guje wa methyl cellulose ether agglomeration lokacin haɗuwa da ruwa. Lokacin da aka ƙara HPMC da ruwa don narkar da agglomerates, yana da matukar wuya a tarwatsa da narkewa. Don turmi da aka fesa tare da aikin injiniya, abin da ake buƙata don fineness ya fi girma saboda ɗan gajeren lokacin haɗuwa. Har ila yau, tarar HPMC tana da wani tasiri a kan riƙewar ruwa. Gabaɗaya magana, ga methyl cellulose ethers tare da danko iri ɗaya amma lafiya daban-daban, a ƙarƙashin adadin ƙari iri ɗaya, mafi kyawun mafi kyawun mafi kyawun tasirin riƙewar ruwa. Riƙewar ruwa na HPMC kuma yana da alaƙa da yanayin zafin da ake amfani da shi, kuma riƙewar ruwa na methyl cellulose ether yana raguwa tare da haɓakar zafin jiki. Koyaya, a cikin aikace-aikacen zahiri na zahiri, turmi foda busassun ana amfani da su sau da yawa zuwa abubuwan zafi a yanayin zafi mai yawa (mafi girma fiye da digiri 40) a cikin mahalli da yawa, kamar bangon bangon bangon bangon waje a ƙarƙashin rana a lokacin rani, wanda galibi yana haɓaka Curing na siminti da taurin busassun turmi foda. Rashin raguwar adadin ruwa yana haifar da jin dadi mai mahimmanci cewa duka aikin aiki da tsattsauran ra'ayi sun shafi, kuma yana da mahimmanci musamman don rage tasirin yanayin zafi a ƙarƙashin wannan yanayin.

3. Thickening da thixotropy na cellulose ether: Aikin na biyu na ether cellulose-thickening sakamako ya dogara da: digiri na polymerization na cellulose ether, bayani maida hankali, zafin jiki da kuma 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. Don ƙananan danko HPMC bayani, 10% -15% maida hankali bayani za a iya shirya, matsakaici- danko HPMC za a iya shirya 5% -10% bayani, da kuma high danko HPMC iya kawai shirya 2% -3% bayani, da danko. na cellulose ether yawanci Grading kuma an yi grading tare da 1% -2% bayani. High kwayoyin nauyi cellulose ether yana da high thickening yadda ya dace. Polymers tare da ma'auni daban-daban na kwayoyin halitta suna da danko daban-daban a cikin maganin taro iri ɗaya. Babban darajar polymerization. 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. Hakanan za'a iya daidaita daidaito ta zabar girman barbashi da zabar ethers cellulose tare da digiri daban-daban na gyare-gyare. Abin da ake kira gyare-gyare shine gabatar da wani mataki na maye gurbin kungiyoyin hydroxyalkyl akan tsarin kwarangwal na MC. Ta hanyar canza dabi'un musanyawa na madogara biyun, wato, DS da ms dangi maye dabi'u na methoxy da hydroxyalkyl wadanda muke yawan fada. Ana iya samun buƙatun ayyuka daban-daban na ether cellulose ta hanyar canza dabi'un maye gurbin dangi na madogara biyu. Dangantakar da ke tsakanin daidaituwa da gyare-gyare: ƙari na ether cellulose yana rinjayar yawan amfani da ruwa na turmi, canza canjin ruwa da ciminti shine tasirin daɗaɗɗa, mafi girman sashi, mafi girma yawan amfani da ruwa. Cellulose ethers da aka yi amfani da su a cikin kayan gini na foda dole ne su narke da sauri a cikin ruwan sanyi kuma su samar da daidaito mai dacewa ga tsarin. 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. Saboda haka, cellulose ethers na daya danko sa ko da yaushe nuna iri rheological Properties idan dai da taro da kuma zafin jiki suna kiyaye akai. Ana samar da gels na tsari lokacin da zafin jiki ya tashi, kuma ana samun kwararar thixotropic sosai. Babban maida hankali da ƙananan danko ethers cellulose suna nuna thixotropy ko da a ƙasa da zafin jiki na gel. Wannan kadarar tana da matukar fa'ida ga daidaitawa da daidaitawa da sagging a cikin ginin ginin turmi. Ya kamata a bayyana a nan cewa mafi girman danko na ether cellulose, mafi kyawun riƙewar ruwa, amma mafi girma da danko, mafi girman nauyin kwayoyin halitta na cellulose ether, da kuma raguwa mai dacewa a cikin solubility, wanda yana da mummunan tasiri. a kan turmi maida hankali da aikin yi. Mafi girma da danko, mafi bayyane tasirin tasiri akan turmi, amma bai dace ba. Wasu matsakaici da ƙananan danko, amma gyaggyarawa ether cellulose yana da mafi kyawun aiki wajen inganta ƙarfin tsarin jika. Tare da haɓakar danko, riƙewar ruwa na ether cellulose yana inganta.

4. Retardation na cellulose ether: Ayyuka 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 ga amfani da turmi a 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 bayani na pore, cellulose ether 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 sakamako na 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 kyawun sakamako na retarding na ether cellulose, yana da ƙarfi da tasiri na maye gurbin hydrophilic fiye da karuwar ruwa. Duk da haka, danko na ether cellulose yana da ɗan tasiri akan ciminti hydration motsi. Tare da haɓaka abun ciki na ether cellulose, lokacin saita turmi yana ƙaruwa sosai. Akwai kyakkyawar alaƙar da ba ta dace ba tsakanin lokacin saitin farko na turmi da abun ciki na ether cellulose, da kuma kyakkyawar alaƙa tsakanin lokacin saitin ƙarshe da abun ciki na ether cellulose. Za mu iya sarrafa lokacin aiki na turmi ta hanyar canza adadin ether cellulose. Don taƙaitawa, a cikin turmi da aka shirya, ether cellulose yana taka rawa wajen 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.