Kugwiritsa Ntchito Cellulose Ether

Mu kapangidwe ka matope ouma,ether ya celluloseNdi chowonjezera chofunikira chomwe chili ndi kuchuluka kochepa kowonjezera, koma chingathandize kwambiri kusakaniza ndi kumanga kwa matope. Mwachidule, pafupifupi mphamvu zonse zosakaniza zonyowa za matope zomwe zimawoneka ndi maso amaliseche zimaperekedwa ndi cellulose ether. Ndi cellulose derivative yomwe imapezeka pogwiritsa ntchito cellulose kuchokera ku matabwa ndi thonje, imagwira ntchito ndi caustic soda, kenako n’kutentha ndi etherifying agent.

Mitundu ya ethers ya cellulose

A. Hydroxypropyl methyl cellulose (HPMC), yomwe imapangidwa makamaka ndi thonje loyeretsedwa bwino kwambiri ngati zinthu zopangira, imatenthedwa makamaka ndi mpweya woipa m'malo okhala ndi alkaline.
B. Hydroxyethyl methylcellulose (HEMC), ether ya cellulose yosakhala ionic, ndi ufa woyera wooneka ngati ufa, wopanda fungo komanso wopanda kukoma.
C. Hydroxyethyl cellulose (HEC), chinthu chopanda ma ionic surfactant, choyera, chopanda fungo, chopanda kukoma komanso ufa wosavuta kuyenda.

Zomwe zili pamwambazi ndi ma ether a cellulose omwe si a ionic, ndi ma ether a cellulose a ionic (monga carboxymethyl cellulose CMC).

Pogwiritsa ntchito matope ouma, chifukwa ionic cellulose (CMC) imakhala yosakhazikika pakakhala ma calcium ions, siigwiritsidwa ntchito kawirikawiri m'makina opangira ma gelling okhala ndi simenti ndi laimu wosweka ngati zinthu zomangira simenti. M'malo ena ku China, ma putty ena amkati omwe amakonzedwa ndi starch yosinthidwa ngati zinthu zazikulu zomangira simenti ndi ufa wa Shuangfei ngati chodzaza amagwiritsa ntchito CMC ngati chokhuthala. Komabe, chifukwa mankhwalawa amatha kugwidwa ndi bowa ndipo sagonjetsedwa ndi madzi, amachotsedwa pang'onopang'ono ndi msika. Pakadali pano, cellulose ether yomwe imagwiritsidwa ntchito kwambiri ku China ndi HPMC.

Cellulose ether imagwiritsidwa ntchito makamaka ngati chosungira madzi komanso chokhuthala mu zinthu zopangidwa ndi simenti.

Ntchito yake yosunga madzi ingalepheretse kuti gawo lapansi lisatenge madzi ambiri ndikulepheretsa madzi kutuluka, kuti zitsimikizire kuti simenti ili ndi madzi okwanira ikasungunuka. Tengani ntchito yopaka pulasitala mwachitsanzo. Ngati matope wamba a simenti agwiritsidwa ntchito pamwamba pa nthaka, gawo louma komanso lokhala ndi mapopoma limayamwa madzi ambiri kuchokera pansi pa nthaka, ndipo matope a simenti omwe ali pafupi ndi gawo loyambira amataya madzi ofunikira kuti madzi asungunuke mosavuta. , kotero sikuti amangopanga gel ya simenti yokhala ndi mphamvu yolumikizira pamwamba pa gawo lapansi, komanso amatha kupindika ndikutuluka madzi, kotero kuti matope a simenti pamwamba pake ndi osavuta kugwa. Pamene matope omwe amagwiritsidwa ntchito ndi ochepa, zimakhala zosavuta kupanga ming'alu mu grout yonse. Chifukwa chake, kale ntchito yopaka pulasitala pamwamba, madzi nthawi zambiri amagwiritsidwa ntchito kunyowetsa gawo lapansi poyamba, koma ntchito iyi sikuti imangotenga nthawi yambiri komanso imatenga nthawi yambiri, komanso mtundu wa ntchito ndi wovuta kuwongolera.

Kawirikawiri, kusunga madzi mu simenti kumawonjezeka ndi kuchuluka kwa kuchuluka kwa cellulose ether. Kukhuthala kwa cellulose ether yowonjezera kukakhala kwakukulu, kusunga madzi kumakhala bwino.

Kuwonjezera pa kusunga madzi ndi kukhuthala, cellulose ether imakhudzanso zinthu zina za simenti, monga kuchedwetsa, kulowetsa mpweya, komanso kukulitsa mphamvu ya ma bond. Cellulose ether imachepetsa kukhazikika ndi kuuma kwa simenti, motero imawonjezera nthawi yogwirira ntchito. Chifukwa chake, nthawi zina imagwiritsidwa ntchito ngati coagulant.

Ndi chitukuko cha matope osakaniza ouma,ether ya cellulosechakhala chosakaniza chofunikira cha simenti. Komabe, pali mitundu yambiri ndi zofunikira za cellulose ether, ndipo ubwino pakati pa magulu umasinthasinthabe.