Focus on Cellulose ethers

Cellulose ether a shirye gauraye turmi

Muhimmancin aikin ether cellulose a cikin shirye-shiryen cakuda turmi:

A cikin turmi da aka shirya, adadin ether cellulose da aka ƙara yana da ƙasa sosai, amma zai iya inganta aikin rigar turmi sosai, aikin ginin turmi babban ƙari ne. Zaɓin madaidaicin nau'ikan nau'ikan iri daban-daban, ɗanɗano daban-daban, girman barbashi daban-daban, digiri daban-daban na danko da ƙara adadin ether cellulose

A cikin turmi da aka shirya, adadin ether cellulose da aka ƙara yana da ƙasa sosai, amma zai iya inganta aikin rigar turmi sosai, aikin ginin turmi babban ƙari ne. Kyakkyawan zaɓi na ether cellulose tare da nau'i daban-daban, daban-daban danko, nau'in nau'i daban-daban, digiri daban-daban na danko da adadin adadin yana da tasiri mai kyau akan inganta kayan busassun turmi. A halin yanzu, yawancin masonry da plastering turmi suna da ƙarancin aikin riƙe ruwa, kuma rabuwar ruwa zai faru bayan ƴan mintuna kaɗan na tsaye.

Riƙewar ruwa wani muhimmin aiki ne na methyl cellulose ether, amma har ma da yawa masana'antun busassun turmi na gida, musamman a yankin kudanci na masana'antun zafin jiki mafi girma sun damu game da wasan kwaikwayon. Abubuwan da ke shafar tasirin riƙon ruwa na busassun turmi sun haɗa da adadin MC, MC danko, ɓacin rai da zafin jiki na yanayi.

Cellulose ether polymer roba ce da aka yi da cellulose na halitta azaman albarkatun ƙasa ta hanyar gyare-gyaren sinadarai. Cellulose ether ne wanda aka samu daga halitta cellulose, cellulose ether samar da roba polymer ne daban-daban, da mafi asali abu ne cellulose, halitta polymer mahadi. Saboda ƙayyadaddun tsarin tsarin cellulose na halitta, cellulose kanta ba ta da ikon amsawa tare da wakili na etherifying. Duk da haka, bayan da magani na kumburi wakili, da karfi hydrogen bond tsakanin kwayoyin sarƙoƙi da kuma a cikin sarkar da aka lalace, da kuma aiki na hydroxyl kungiyar da aka saki a cikin alkali cellulose da dauki ikon, da cellulose ether aka samu ta hanyar dauki ETHERifying wakili - Kungiyar OH zuwa -OR kungiyar.

Abubuwan da ke cikin ethers cellulose sun dogara da nau'in, lamba da rarraba abubuwan maye. Har ila yau, ƙaddamar da ether cellulose yana dogara ne akan nau'in maye gurbin, digiri na etherification, solubility da aikace-aikacen da ke da alaƙa za a iya rarraba. Dangane da nau'in maye gurbin akan sarkar kwayoyin halitta, ana iya raba shi zuwa ether guda ɗaya da gauraye ether. Yawancin lokaci ana amfani da MC azaman ether ɗaya, yayin da HPMC shine ether mai gauraya. Methyl cellulose ether MC ne na halitta cellulose glucose naúrar a kan hydroxyl methoxide maye gurbinsu da samfurin tsarin dabara ne [COH7O2 (OH) 3-H (OCH3) H] X, hydroxypropyl methyl cellulose ether HPMC ne naúrar a kan hydroxyl ɓangare na Methoxide wanda aka maye gurbinsa da hydroxypropyl, wani sashi na samfurin yana maye gurbinsa da hydroxypropyl, Tsarin tsarin shine [C6H7O2 (OH) 3-MN (OCH3) M [OCH2CH (OH) CH3] N] X da hydroxyethyl methyl cellulose ether HEMC, wanda shine ana amfani da shi sosai kuma ana siyarwa a kasuwa.

Daga solubility za a iya raba zuwa nau'in ionic da wadanda ba ionic irin. Ruwa mai narkewa mara-ionic cellulose ether yafi hada da alkyl ether da hydroxyl alkyl ether guda biyu jerin iri. Ionic CMC ana amfani da shi ne a cikin kayan wanka na roba, yadi, bugu, abinci da amfani da man fetur. Non-ionic MC, HPMC, HEMC da sauran waɗanda aka fi amfani da su a cikin kayan gini, suturar latex, magani, sunadarai na yau da kullun da sauran fannoni. A matsayin wakili mai kauri, wakili mai riƙe ruwa, stabilizer, dispersant, wakilin samar da fim.

Tsarin ruwa na Cellulose ether: a cikin samar da kayan gini, musamman busassun turmi, 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), amma kuma wani ɓangare na mahimmanci. Muhimmiyar rawar da ether mai narkewa ta ruwa mai narkewa a cikin turmi galibi yana da nau'ikan abubuwa guda uku, ɗayan kyakkyawan ikon riƙe ruwa, na biyu shine tasirin daidaiton turmi da thixotropy, na uku shine hulɗa tare da ciminti. Riƙewar ruwa na Cellulose ether, ya dogara da tushe na hydroscopicity, abun da ke ciki na turmi, kauri mai kauri, buƙatun ruwa na turmi, lokacin haɓaka kayan haɓaka. Riƙewar ruwa na ether cellulose ya fito ne daga solubility da dehydration na cellulose ether kanta. Sanannen abu ne cewa sarƙoƙi na cellulose, ko da yake suna ɗauke da adadi mai yawa na ƙungiyoyin OH masu ruwa sosai, ba su narkewa a cikin ruwa saboda tsarin su na crystalline. Ƙarfin hydration na ƙungiyoyin hydroxyl kadai bai isa ya biya kuɗin haɗin gwiwar hydrogen mai ƙarfi da kuma van der Waals ba. Lokacin da aka shigar da abubuwan maye a cikin sarkar kwayoyin, ba kawai masu maye gurbin suna lalata sarkar hydrogen ba, har ma da haɗin gwiwar hydrogen ɗin yana karye saboda ƙulla abubuwan maye tsakanin sarƙoƙi da ke kusa. Mafi girman abubuwan maye gurbin su, mafi girman nisa tsakanin kwayoyin halitta shine. Mafi girma da lalata tasirin haɗin gwiwar hydrogen, haɓakar cellulose lattice, bayani a cikin ether cellulose ya zama mai narkewa mai ruwa, da samuwar babban danko bayani. Yayin da zafin jiki ya tashi, hydration na polymer yana raguwa kuma ana fitar da ruwa tsakanin sarƙoƙi. Lokacin da tasirin dehydrating ya isa, kwayoyin sun fara haɗuwa kuma gel ɗin yana ninka a cikin hanyar sadarwa mai girma uku.

Abubuwan da ke shafar riƙewar ruwa na turmi sun haɗa da danko ether cellulose, sashi, fineness barbashi da zafin sabis.

Mafi girman danko na ether cellulose, mafi kyawun aikin riƙe ruwa. Danko shine muhimmin siga na aikin MC. A halin yanzu, masana'antun MC daban-daban suna amfani da hanyoyi da kayan aiki daban-daban don auna danko na MC. Babban hanyoyin sun hada da Haake Rotovisko, Hoppler, Ubbelohde da Brookfield. Don samfurin iri ɗaya, sakamakon danko da aka auna ta hanyoyi daban-daban sun bambanta sosai, wasu ma bambance-bambance ne. Sabili da haka, lokacin kwatanta danko, dole ne a aiwatar da shi tsakanin hanyar gwajin iri ɗaya, gami da zazzabi, rotor, da sauransu.

Gabaɗaya magana, mafi girman danko, mafi kyawun tasirin riƙewar ruwa. Duk da haka, mafi girman danko shine, mafi girman nauyin kwayoyin halitta na MC shine, kuma aikin rushewa zai ragu daidai, wanda yana da mummunan tasiri akan ƙarfin da aikin ginin turmi. Mafi girman danko, mafi bayyane tasirin tasirin turmi, amma bai dace da dangantakar ba. Mafi girma da danko, rigar turmi zai zama mafi m, duka gine-gine, aikin ƙwanƙwasa mai laushi da babban mannewa ga kayan tushe. Amma ba taimako ba ne don ƙara ƙarfin tsarin jika. A lokacin gini, aikin anti-sag ba a bayyane yake ba. Akasin haka, wasu ƙananan danko amma gyare-gyare na methyl cellulose ethers suna da kyakkyawan aiki wajen inganta ƙarfin tsarin jika.

Ƙara yawan ether cellulose zuwa turmi, mafi kyawun aikin riƙe ruwa, mafi girma da danko, mafi kyawun aikin riƙe ruwa.

Don girman barbashi, mafi kyawun barbashi, mafi kyawun riƙewar ruwa. Large barbashi na cellulose ether lamba tare da ruwa, da surface nan da nan narke da kuma samar da wani gel to kunsa sama da abu don hana ruwa kwayoyin daga ci gaba da shiga, wani lokacin dogon lokaci stirring ba za a iya ko'ina tarwatsa narkar da, samuwar wani laka flocculent bayani ko agglomerate. Solubility na ether cellulose yana daya daga cikin abubuwan da za a zabi ether cellulose. Fineness kuma muhimmin ma'aunin aiki ne na methyl cellulose ether. MC don busassun turmi yana buƙatar foda, ƙananan abun ciki na ruwa, da fineness na 20% ~ 60% girman barbashi kasa da 63um. Fineness yana rinjayar solubility na methyl cellulose ether. M ƙwaƙƙwal yawanci granular ne kuma ana iya narkar da shi cikin sauƙi cikin ruwa ba tare da haɓaka ba, amma saurin rushewar yana da jinkirin gaske, don haka bai dace da amfani da busasshiyar turmi ba. A cikin busasshiyar turmi, MC yana tarwatsewa tsakanin jimillar, filaye masu kyau da kayan siminti kamar siminti, kuma foda kawai wanda yake da kyau zai iya guje wa dunkulewar methyl cellulose ether lokacin haɗe da ruwa. Lokacin da MC ya ƙara ruwa don narkar da agglomerate, yana da wuya a tarwatsawa da narkar da shi. MC tare da m fineness ba kawai sharar gida, amma kuma rage gida ƙarfi na turmi. Lokacin da aka gina irin wannan busasshen turmi a wani babban wuri, saurin warkar da busasshen turmi na gida yana raguwa sosai, wanda ke haifar da tsagewar lokacin warkewa daban-daban. Don injin fesa turmi, saboda ɗan gajeren lokacin haɗawa, ƙarancin ya fi girma.

Lalacewar MC shima yana da wani tasiri akan rikon ruwan sa. Gabaɗaya magana, don methyl cellulose ether tare da danko iri ɗaya amma lafiya daban-daban, mafi kyawun tasirin riƙewar ruwa ya fi kyau a ƙarƙashin adadin ƙari.

Riƙewar ruwa na MC 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. Amma a cikin ainihin kayan aikace-aikacen, yawancin mahalli na busassun turmi sau da yawa za su kasance a cikin babban zafin jiki (fiye da digiri 40) a ƙarƙashin yanayin gini a cikin yanayin zafi, kamar insolation na rani na bangon bangon plastering na waje, wanda sau da yawa ya haɓaka da ƙarfi. siminti da bushewar turmi taurin. Rage yawan riƙewar ruwa yana haifar da tabbataccen jin cewa duka haɓakawa da juriya suna shafar. A cikin wannan yanayin, rage tasirin abubuwan zafin jiki ya zama mahimmanci musamman. Ko da yake ana ɗaukar ƙari na methyl hydroxyethyl cellulose ether a matsayin kan gaba wajen ci gaban fasaha, dogaro da zafin jiki har yanzu zai haifar da raunana kaddarorin busassun turmi. Ko da tare da karuwa na methyl hydroxyethyl cellulose sashi (nau'in lokacin rani), ginin da juriya na fata har yanzu ba zai iya biyan bukatun amfani ba. Ta hanyar wasu jiyya na musamman na MC, irin su ƙara darajar etherification, tasirin riƙewar ruwa na MC zai iya kula da sakamako mafi kyau a ƙarƙashin babban zafin jiki, don haka zai iya samar da mafi kyawun aiki a ƙarƙashin yanayi mai tsanani.

Bugu da kari, cellulose ether thickening da thixotropy: cellulose ether mataki na biyu - thickening dogara a kan: cellulose ether polymerization digiri, bayani maida hankali, karfi kudi, zazzabi da sauran yanayi. Kayan gelation na maganin ya keɓanta ga alkyl cellulose da abubuwan da aka gyara. Halayen Gelation suna da alaƙa da matakin maye gurbin, ƙaddamar da bayani da ƙari. Don abubuwan da aka gyara na hydroxyl alkyl, kayan gel kuma suna da alaƙa da matakin gyaran hydroxyl alkyl. Domin bayani taro na low danko MC da HPMC za a iya shirya 10% -15% maida hankali bayani, matsakaici danko MC da HPMC za a iya shirya 5% -10% bayani, da kuma high danko MC da HPMC za a iya shirya kawai 2% -3. % bayani, kuma yawanci cellulose ether danko grading shi ma zuwa 1% -2% bayani ga sa. Babban 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 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 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 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 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 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 ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar cuta, nau'in polymers daban-daban suna da danko daban-daban, danko da nauyin kwayoyin halitta kamar haka, [η] = 2.92 × 10-2 (DPn) 0.905, DPn shine matsakaici. polymerization darajar high. Ƙarƙashin 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 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 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 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 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 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 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 ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar cuta don ƙara ƙarin don cimma danko mai niyya. Dankin sa yana da ƙasa da dogaro akan ƙimar ƙarfi, babban danko don cimma maƙasudin maƙasudi, adadin da ake buƙata don ƙara ƙasa da ƙasa, 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. Gelation zafin jiki na maganin ya ragu a layi tare da karuwa da ƙaddamar da maganin, kuma gelation ya faru a cikin dakin da zafin jiki bayan kai wani matsayi. HPMC yana da babban taro na gelation a dakin da zafin jiki.

Hakanan za'a iya daidaita daidaito ta hanyar zaɓar girman barbashi da ethers cellulose tare da digiri daban-daban na gyare-gyare. Abin da ake kira gyare-gyare shine gabatarwar ƙungiyar hydroxyl alkyl a wani mataki na maye gurbin akan tsarin kwarangwal na MC. Ta hanyar canza dabi'un maye gurbin dangi biyu, wato, DS da MS dangi maye dabi'un methoxy da hydroxyl. Ana buƙatar kaddarorin daban-daban na ether cellulose ta hanyar canza dabi'un maye gurbin dangi na nau'ikan maye biyu.

Dangantakar da ke tsakanin daidaituwa da gyare-gyare: ƙari na ether cellulose yana rinjayar yawan amfani da ruwa na turmi, kuma yana canza yanayin ruwa na ruwa da siminti, wanda shine tasiri mai zurfi. Mafi girman sashi, 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 daidaitattun daidaito ga tsarin. Idan adadin shear da aka bayar har yanzu yana juye-juye da colloidal samfurin mara inganci ko mara kyau.

Har ila yau, akwai kyakkyawar dangantaka tsakanin ciminti slurry daidaito da kuma sashi na cellulose ether, cellulose ether iya ƙwarai ƙara danko na turmi, mafi girma da sashi, da mafi fili sakamako. Maganin ruwa na Cellulose ether tare da babban danko yana da babban thixotropy, wanda shine ɗayan halayen ether cellulose. Maganin ruwa na nau'in nau'in polymers na MC yawanci suna da pseudoplastic, ruwa maras-thixotropic a ƙasa da zafin gel ɗin su, amma kaddarorin kwararar Newtonian a ƙananan ƙimar ƙarfi. Pseudoplasticity yana ƙaruwa tare da haɓakar nauyin kwayoyin halitta ko tattarawar ether cellulose kuma yana da zaman kansa daga nau'in maye gurbin da digiri. Saboda haka, cellulose ethers na wannan danko sa, ko MC, HPMC ko HEMC, ko da yaushe nuna guda rheological Properties idan dai da taro da kuma yawan zafin jiki zauna akai. Lokacin da yawan zafin jiki ya karu, gel ɗin tsari yana samuwa kuma babban thixotropic yana faruwa. Cellulose ethers tare da babban taro da ƙananan danko suna nuna thixotropy ko da a ƙasa da zafin jiki na gel. Wannan kadarar tana da matuƙar fa'ida ga ginin turmi don daidaita magudanar ruwa da kayan rataye. Ya kamata a bayyana a nan cewa mafi girma danko na cellulose ether, mafi kyawun riƙewar ruwa, amma mafi girma da danko, mafi girman nauyin kwayoyin halitta na cellulose ether, daidaitattun raguwa na solubility, wanda yana da mummunar tasiri akan. da turmi taro da yi yi. Mafi girman danko, mafi bayyane tasirin tasirin turmi, amma ba cikakkiyar alaƙa ba ce. Wasu ƙananan danko, amma gyare-gyaren ether cellulose a inganta ƙarfin tsarin tsarin jika yana da kyakkyawan aiki, tare da karuwar danko, haɓakar ruwa na cellulose ether ya inganta.

Cellulose ether retardation: cellulose ether matsayi na uku shine jinkirta tsarin hydration na siminti. Cellulose ether yana ba da turmi tare da kaddarorin masu fa'ida iri-iri, amma kuma yana rage saurin sakin siminti na hydration, yana jinkirta aikin ciminti mai kuzari. Wannan ba shi da kyau a yi amfani da turmi a wuraren sanyi. Irin wannan sakamako na retarding shine cellulose ether molecule adsorption akan CSH da Ca (OH) 2 samfurori na hydration lalacewa ta hanyar, saboda karuwar ƙwayar ƙwayar ƙwayar cuta, cellulose ether yana rage aikin ions a cikin maganin, don haka jinkirta tsarin hydration. Mafi girman ƙaddamar da ether cellulose a cikin kayan gel na ma'adinai, mafi mahimmancin tasirin jinkirin hydration. Cellulose ether ba kawai jinkirta saitin ba, har ma da tsarin hardening tsarin siminti turmi. 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 HEMC methylation, mafi kyawun sakamako na retarding na ether cellulose. Sakamakon retarding na maye gurbin hydrophilic ya fi ƙarfi fiye da na ƙarar maye gurbin ruwa. Amma danko na ether cellulose yana da ɗan tasiri akan hydration kinetics na siminti.

Tare da haɓaka abun ciki na ether cellulose, lokacin saita turmi yana ƙaruwa sosai. Lokacin saitin farko na turmi yana da alaƙa mai kyau na layi tare da abun ciki na ether cellulose, kuma lokacin saitin ƙarshe yana da alaƙa mai kyau tare 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 a cikin riƙewar ruwa, daɗaɗawa, jinkirta ciminti hydration ikon, inganta aikin ginin. Kyakkyawan ikon riƙewar ruwa yana sa ciminti hydration ya zama cikakke, zai iya inganta dankon rigar rigar turmi, inganta ƙarfin haɗin gwiwa na turmi, lokacin daidaitacce. Ƙara ether cellulose zuwa turmi mai fesa injina na iya haɓaka aikin feshi ko aikin famfo da ƙarfin tsarin turmi. Sabili da haka, ana amfani da ether cellulose ko'ina azaman ƙari mai mahimmanci a cikin turmi da aka shirya.


Lokacin aikawa: Dec-17-2021
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