Mwachidule: amatchedwa HPMC, woyera kapena woyera fibrous kapena granular ufa.Pali mitundu yambiri ya cellulose ndipo imagwiritsidwa ntchito kwambiri, koma timalumikizana kwambiri ndi makasitomala mumakampani opanga zida zomangira ufa.Ma cellulose ambiri amatanthauza hypromellose.
Kupanga: Zida zazikulu za HPMC: thonje woyengedwa, methyl chloride, propylene oxide, zida zina zopangira monga flake alkali, asidi, toluene, isopropanol, ndi zina zambiri. ola, atolankhani, pulverize mapadi, ndi bwino zaka pa 35 ℃, kuti pafupifupi digiri ya polymerization wa analandira CHIKWANGWANI zamchere ndi mkati osiyanasiyana chofunika.Ikani ulusi wa alkali mu ketulo ya etherification, onjezerani propylene oxide ndi methyl chloride motsatira, ndi etherify pa 50-80 ° C kwa maola 5, ndi kuthamanga kwakukulu kwa pafupifupi 1.8 MPa.Kenako onjezerani kuchuluka koyenera kwa hydrochloric acid ndi oxalic acid kumadzi otentha pa 90 ° C kuti musambe zinthuzo kuti muwonjezere voliyumuyo.Dehydrate ndi centrifuge.Sambani mpaka osalowerera ndale, ndipo chinyontho chikakhala chochepera 60%, chiumeni ndi mpweya wotentha wa 130 ° C mpaka 5%.Ntchito: kusungirako madzi, kukhuthala, thixotropic anti-sag, air-entraining workability, retarding setting.
Kusunga madzi: Kusunga madzi ndi chinthu chofunikira kwambiri cha cellulose ether!Popanga matope a putty gypsum ndi zinthu zina, kugwiritsa ntchito cellulose ether ndikofunikira.Kusungidwa kwamadzi kwambiri kumatha kuchitapo kanthu mokwanira phulusa la simenti ndi calcium gypsum (pamene zimachitikira mokwanira, mphamvu zake zimakulirakulira).Pazifukwa zomwezo, kuwonjezereka kwa kukhuthala kwa cellulose ether, kumapangitsa kuti madzi asungidwe bwino (mpata womwe uli pamwamba pa 100,000 viscosity umakhala wochepa);Kuchuluka kwa mlingo, kumapangitsa kuti madzi asungidwe bwino, nthawi zambiri kachulukidwe kakang'ono ka cellulose ether kumatha kusintha kwambiri magwiridwe antchito a matope.Kuchuluka kwa madzi osungira madzi, pamene zomwe zilipo zifika pamlingo wina, chizolowezi chowonjezera madzi osungira madzi chimakhala chochepa;kuchuluka kwa kasungidwe ka madzi ka cellulose ether nthawi zambiri kumachepa kutentha kozungulira kumawonjezeka, koma ma ether ena a cellulose apamwamba amakhalanso ndi magwiridwe antchito abwino kwambiri pakatentha kwambiri.Kusunga madzi.The interdiffusion pakati mamolekyu madzi ndi mapadi etero maselo unyolo zimathandiza mamolekyulu madzi kulowa mkati mwa mapalo etere macromolecular unyolo ndi kulandira amphamvu kumanga mphamvu, potero kupanga madzi aulere, entangling madzi, ndi kuwongolera madzi posungira simenti slurry.
Kukhuthala, thixotropic ndi anti-sag: kumapereka mamasukidwe abwino kwambiri kumatope onyowa!Itha kukulitsa kwambiri kumamatira pakati pa matope onyowa ndi matope oyambira, ndikuwongolera magwiridwe antchito amatope a anti-sagging.Kukhuthala kwa ma cellulose ethers kumawonjezeranso kukana kwa kubalalitsidwa komanso kusakanikirana kwa zinthu zomwe zangosakanikirana, kuteteza delamination, tsankho ndi magazi.Kuchulukana kwa ma cellulose ethers pazida zopangira simenti kumachokera ku viscosity ya ma cellulose ether solution.Pansi pazikhalidwe zomwezo, kukhathamiritsa kwamphamvu kwa cellulose ether, kumapangitsanso kukhuthala kwazinthu zosinthidwa simenti, koma ngati mamasukidwe ake ndi akulu kwambiri, zimakhudza kutulutsa ndi kugwirira ntchito kwa zinthuzo (monga trowel yomata ndi batch). scraper).zovuta).Mtondo wodziyimira pawokha ndi konkriti wodziphatikizira womwe umafunikira madzi ochulukirapo amafunikira kukhuthala kochepa kwa cellulose ether.Kuphatikiza apo, kukhuthala kwa cellulose ether kumawonjezera kufunikira kwamadzi pazinthu zopangira simenti ndikuwonjezera zokolola zamatope.Mkulu mamasukidwe akayendedwe mapadi etere amadzimadzi njira ali mkulu thixotropy, amenenso ndi khalidwe lalikulu la mapadi efa.Amadzimadzi zothetsera mapadi zambiri pseudoplastic, sanali thixotropic otaya katundu m'munsimu awo gel osakaniza kutentha, koma Newtonian otaya katundu pa otsika kukameta ubweya mitengo.Pseudoplasticity imawonjezeka ndi kuchuluka kwa kulemera kwa maselo kapena kuchuluka kwa cellulose ether.Ma gels apangidwe amapangidwa pamene kutentha kumawonjezeka, ndipo kutuluka kwapamwamba kwa thixotropic kumachitika.Ma cellulose ether okhala ndi kuchuluka kwambiri komanso kutsika kwamakhuthala otsika amawonetsa thixotropy ngakhale pansi pa kutentha kwa gel osakaniza.Katunduyu ndiwothandiza kwambiri pakumanga matope omangira kuti asinthe masinthidwe ake ndi kugwa kwake.Tikumbukenso kuti kukhuthala kwa kukhuthala kwa cellulose ether, ndi bwino kusunga madzi, koma kukhuthala kwamphamvu, kumapangitsanso kulemera kwa maselo a cellulose ether, ndi kuchepa kofananira ndi kusungunuka kwake, komwe kuli ndi vuto loyipa. kukhudza ndende ya matope ndi ntchito yake.
Choyambitsa: Ma cellulose ether ali ndi mphamvu zodziwikiratu zopatsa mpweya pazinthu zatsopano za simenti.Ma cellulose ether ali ndi gulu la hydrophilic (gulu la hydroxyl, gulu la ether) ndi gulu la hydrophobic (gulu la methyl, mphete ya glucose), ndi surfactant, limagwira ntchito pamtunda, motero limakhala ndi mphamvu yolowera mpweya.Mpweya wolowetsa mpweya wa cellulose ether udzatulutsa "mpira", womwe ukhoza kupititsa patsogolo ntchito ya zinthu zatsopano zosakanikirana, monga kuonjezera pulasitiki ndi kusalala kwa matope panthawi yogwira ntchito, zomwe zimapindulitsa pakupanga matope. ;zidzawonjezeranso kutuluka kwa matope., kuchepetsa mtengo wopangira matope;koma idzawonjezera porosity ya zinthu zowumitsidwa ndikuchepetsa mphamvu zake zamakina monga mphamvu ndi zotanuka modulus.Monga surfactant, mapadi ether alinso wetting kapena lubricating kwenikweni pa particles simenti, amene pamodzi ndi zotsatira zake mpweya-entraining kumawonjezera fluidity wa zipangizo simenti ofotokoza, koma thickening zotsatira kuchepetsa fluidity.Zotsatira za kuyenda ndi kuphatikiza kwa plasticizing ndi thickening zotsatira.Pamene zomwe zili mu cellulose ether ndizochepa kwambiri, zimawonetsedwa makamaka ngati pulasitiki kapena kuchepetsa madzi;pamene zili pamwamba, kukhuthala kwa cellulose ether kumawonjezeka mofulumira, ndipo zotsatira zake zolowetsa mpweya zimakhala zodzaza, choncho ntchitoyo imawonjezeka.Kuchulukitsa kapena kuchuluka kwa madzi.
Kuchepetsa kuchepa: Ma cellulose ether amatha kuchedwetsa hydration ya simenti.Ma cellulose ethers amapatsa matope ndi zinthu zosiyanasiyana zopindulitsa, komanso amachepetsa kutentha koyambirira kwa simenti ndikuchedwetsa hydration kinetic process ya simenti.Izi sizothandiza kugwiritsa ntchito matope m'madera ozizira.Kuchedwetsaku kumachitika chifukwa cha kutengeka kwa ma cellulose ether mamolekyu pa zinthu za hydration monga CSH ndi ca(OH)2.Chifukwa cha kuchuluka kwa mamasukidwe akayendedwe a pore yankho, cellulose ether amachepetsa kuyenda kwa ayoni mu yankho, potero kuchedwetsa hydration ndondomeko.Kuchulukirachulukira kwa cellulose ether mu mineral gel zakuthupi, m'pamenenso zimawonekera kwambiri kuchedwa kwa hydration.Ma cellulose ether sikuti amangochepetsa kukhazikika, komanso amachepetsa kuuma kwa dongosolo lamatope a simenti.The retardation zotsatira za cellulose ether zimadalira ndende yake mu mchere gel osakaniza dongosolo, komanso dongosolo mankhwala.Kukwera kwa methylation ya HEMC, kumapangitsanso kuchepa kwa cellulose ether.The retardation zotsatira ndi wamphamvu.Komabe, mamasukidwe akayendedwe a cellulose ether alibe mphamvu pang'ono pa hydration kinetics ya simenti.Ndi kuwonjezeka kwa cellulose ether okhutira, kuika nthawi ya matope kumawonjezeka kwambiri.Pali mgwirizano wabwino wosagwirizana pakati pa nthawi yoyamba yoyika matope ndi zomwe zili mu cellulose ether, ndipo nthawi yomaliza yokonzekera imakhala ndi mgwirizano wabwino wa mzere ndi zomwe zili mu cellulose ether.Titha kuwongolera nthawi yogwiritsira ntchito matope mwa kusintha zomwe zili mu cellulose ether.Pogulitsa, imagwira ntchito yosunga madzi, kukhuthala, kuchedwetsa mphamvu ya simenti ya simenti, ndikuwongolera ntchito yomanga.Kuchuluka kwa madzi osungira madzi kumapangitsa kuti simenti ya gypsum phulusa la calcium izichita bwino kwambiri, kumawonjezera kukhuthala konyowa, kumapangitsa kuti matope asamayende bwino, ndipo nthawi yomweyo amatha kupititsa patsogolo mphamvu zamanjenje ndi kumeta ubweya, kuwongolera kwambiri zomangamanga komanso kugwira ntchito moyenera.Nthawi yosinthika.Kupititsa patsogolo kupopera kapena kupopera kwamatope, komanso mphamvu zamapangidwe.Pakugwiritsa ntchito kwenikweni, ndikofunikira kudziwa mtundu, kukhuthala, komanso kuchuluka kwa cellulose molingana ndi zinthu zosiyanasiyana, kamangidwe kake, komanso chilengedwe.
Nthawi yotumiza: Nov-15-2022