Popanga matope a ufa wowuma, methyl cellulose ndi ndalama zochepa zowonjezera, koma zimakhala ndi zowonjezera zomwe zingathe kusintha kwambiri kusakaniza ndi kumanga ntchito yamatope.Kunena mwachidule, pafupifupi zinthu zonse zonyowa zosakaniza zamatope zomwe zimatha kuwonedwa ndi maso amaperekedwa ndi cellulose ether.Ndiwochokera ku cellulose yomwe imapezeka pogwiritsa ntchito cellulose kuchokera kumitengo ndi thonje, kuchitapo kanthu ndi caustic soda, ndikuyipanga etherifying agent.
Mitundu ya Methyl Cellulose Ether
A.Hydroxypropyl methylcellulose (HPMC) amapangidwa makamaka ndi thonje woyengedwa kwambiri ngati zopangira, zomwe zimapangidwira mwapadera pansi pamikhalidwe yamchere.
B.Hydroxyethyl methyl cellulose (HEMC), non-ionic cellulose ether, ndi ufa woyera, wopanda fungo komanso wosakoma.
C.Hydroxyethylcellulose (HEC) ndi yopanda ma ionic surfactant, yoyera m'mawonekedwe, yopanda fungo komanso yosakoma komanso yosavuta kuyenda.
Zomwe zili pamwambazi ndi ma ethers omwe si a ionic cellulose, ndi ma ionic cellulose ethers (monga carboxymethyl cellulose (CMC)).
Pa ntchito youma ufa matope, chifukwa ayoni mapadi (CMC) ndi wosakhazikika pamaso pa ayoni kashiamu, ndi kawirikawiri ntchito inorganic gelling kachitidwe ndi simenti ndi slaked laimu monga cementing zipangizo.M'malo ena ku China, ena mkati mwa khoma putties kukonzedwa ndi kusinthidwa wowuma monga chuma chachikulu simenti ndi Shuangfei ufa monga filler ntchito CMC monga thickener, koma chifukwa mankhwalawa sachedwa mildew ndipo si kugonjetsedwa ndi madzi, pang'onopang'ono kuthetsedwa. pa msika.Pakadali pano, ether ya cellulose yomwe imagwiritsidwa ntchito kwambiri ku China ndi HPMC.
Ma cellulose ether amagwiritsidwa ntchito makamaka ngati chosungira madzi ndi thickener muzinthu zopangidwa ndi simenti.
Ntchito yake yosungira madzi imatha kuteteza gawo lapansi kuti lisatenge madzi ochulukirapo mofulumira ndikulepheretsa kutuluka kwa madzi, kuti zitsimikizire kuti simenti ili ndi madzi okwanira pamene imasungunuka.Tengani ntchito pulasitala monga chitsanzo.Pamene slurry wamba simenti ntchito pamwamba pa gawo lapansi, youma ndi porous gawo lapansi mwamsanga kuyamwa madzi ochuluka kuchokera slurry, ndi simenti slurry wosanjikiza pafupi gawo lapansi mosavuta kutaya hydration.Choncho, osati kupanga simenti gel osakaniza ndi zomatira mphamvu pamwamba pa gawo lapansi, komanso mosavuta warping ndi madzi seepage, kotero kuti pamwamba simenti slurry wosanjikiza mosavuta kugwa.Pamene grout yomwe imagwiritsidwa ntchito imakhala yopyapyala, zimakhalanso zosavuta kupanga ming'alu mu grout yonse.Choncho, m'mbuyomu kupaka pulasitala pamwamba, zinthu zoyambira nthawi zambiri zimanyowetsedwa ndi madzi poyamba, koma ntchitoyi inali yovuta komanso yowononga nthawi, ndipo khalidwe la opaleshoni linali lovuta kulamulira.
Nthawi zambiri, kusungidwa kwa madzi a simenti slurry kumawonjezeka ndi kuchuluka kwa zomwe zili mu cellulose ether.Kuchuluka kwa kukhuthala kwa cellulose ether yowonjezeredwa, kumapangitsa kuti madzi asungidwe bwino.
Kuphatikiza pa kusungirako madzi ndi kukhuthala, cellulose ether imakhudzanso zinthu zina za matope a simenti, monga kubweza, kulowetsa mpweya, ndi kuonjezera mphamvu za mgwirizano.Ma cellulose ether amachepetsa kuyika ndi kuuma kwa simenti, potero kumatalikitsa nthawi yogwira ntchito, motero nthawi zina amagwiritsidwa ntchito ngati chowongolera.
Ndi chitukuko cha matope osakaniza owuma, cellulose ether yakhala yofunika kwambiri ya simenti yosakaniza.Komabe, pali mitundu yambiri ndi mawonekedwe a cellulose ether, ndipo mtundu pakati pa magulu umasinthasintha.
1. Makhalidwe ogwirira ntchito a matope osinthidwa amagwirizana kwambiri ndi kukula kwa viscosity ya cellulose ether.Ngakhale kuti mankhwala okhala ndi mamasukidwe apamwamba mwadzina amakhala ndi mamasukidwe apamwamba omaliza, chifukwa cha kusungunuka pang'onopang'ono, zimatenga nthawi yayitali kuti mupeze kukhuthala komaliza;kuwonjezera , The mapadi efa ndi coarser particles amatenga nthawi yaitali kupeza mamasukidwe akayendedwe komaliza, kotero mankhwala ndi kukhuthala apamwamba sikutanthauza makhalidwe abwino ntchito.
2. Chifukwa cha kuchepa kwa digiri ya polymerization ya cellulose ether zopangira, kukhuthala kwakukulu kwa cellulose ether kumakhala kochepa.
3. Ndikofunikira kuyang'ana kugula, kupanga ndi kuyang'anira fakitale kuti tipewe kusinthasintha kwa khalidwe.
Nthawi yotumiza: Feb-17-2023