Carboxymethyl cellulose (Sodium Carboxymethyl Cellulose) yomwe imatchedwa CMC, ndi gawo logwira ntchito la colloid polima, ndi mtundu wa cellulose wopanda fungo, wosakoma, wopanda poizoni wosungunuka m'madzi, womwe umapangidwa ndi thonje loyamwa pogwiritsa ntchito mankhwala amthupi. organic cellulose binder ndi mtundu wa cellulose ether, ndipo mchere wake wa sodium umagwiritsidwa ntchito nthawi zambiri, motero dzina lake lonse liyenera kutchedwa sodium carboxymethyl cellulose, yomwe ndi CMC-Na.
Monga methyl cellulose, carboxymethyl cellulose itha kugwiritsidwa ntchito ngati surfactant ya zinthu zowunikidwa komanso ngati chomangira kwakanthawi kwa zinthu zowumitsa.
Sodium carboxymethyl cellulose ndi polyelectrolyte yopanga, kotero imatha kugwiritsidwa ntchito ngati dispersant ndi stabilizer kwa slurries refractory ndi castables, komanso ndi kwakanthawi mkulu-mwachangu organic binder. Lili ndi zabwino izi:
1. Carboxymethyl cellulose imatha kudsorbed pamwamba pa tinthu tating'onoting'ono, kulowa ndikulumikiza tinthu tating'onoting'ono bwino, kotero kuti thupi lamphamvu lamphamvu likhoza kupezeka;
2. Popeza carboxymethyl cellulose ndi anionic polima electrolyte, imatha kuchepetsa kuyanjana pakati pa tinthu tating'onoting'ono tating'onoting'ono tating'onoting'ono tating'onoting'ono tating'onoting'ono, ndikuchita gawo la dispersant ndi zoteteza colloid, motero kuwongolera kachulukidwe ndi mphamvu ya mankhwalawa ndikuchepetsa. pambuyo-kuwotcha. Inhomogeneity ya dongosolo la bungwe;
3. Kugwiritsa ntchito carboxymethyl cellulose monga binder, palibe phulusa pambuyo poyaka, ndipo pali zinthu zochepa zosungunuka, zomwe sizimakhudza kutentha kwa ntchito.
Zogulitsa Zamalonda
1. CMC ndi woyera kapena pang'ono wachikasu fibrous granular ufa, zoipa, odorless, sanali poizoni, mosavuta sungunuka m'madzi, ndipo amapanga mandala viscous colloid, njira yothetsera ndale kapena pang'ono zamchere. Ikhoza kusungidwa kwa nthawi yaitali popanda kuwonongeka, komanso imakhala yokhazikika pansi pa kutentha kochepa komanso kuwala kwa dzuwa. Komabe, chifukwa cha kusintha kwa kutentha kwachangu, acidity ndi alkalinity ya yankho limasintha. Mothandizidwa ndi cheza cha ultraviolet ndi tizilombo tating'onoting'ono, zidzachititsanso hydrolysis kapena oxidation, kukhuthala kwa yankho kudzachepa, ndipo ngakhale yankho lidzaipitsidwa. Ngati yankho liyenera kusungidwa kwa nthawi yayitali, zotetezera zoyenera monga formaldehyde, phenol, benzoic acid, mankhwala a organic mercury, etc.
2. CMC ndi yofanana ndi ma electrolyte ena a polima. Ikasungunuka, imayamba kutulutsa chodabwitsa chotupa, ndipo tinthu tating'onoting'ono timamatirana kuti tipange filimu kapena viscose, zomwe zimapangitsa kuti zisawonongeke, koma zimasungunuka pang'onopang'ono. Choncho, pokonzekera njira yake yamadzimadzi, ngati tinthu tating'onoting'ono titha kunyowa mofanana poyamba, kusungunuka kumatha kuwonjezeka kwambiri.
3. CMC ndi hygroscopic. M'mlengalenga, madzi ambiri a CMC amawonjezeka ndi kutentha kwa mpweya ndikuchepa ndi kutentha kwa mpweya. Pamene kutentha kwapakati pa chipinda ndi 80% -50%, madzi omwe ali ofanana ndi oposa 26%, ndipo madzi opangidwa ndi 10% kapena osachepera. Choncho, kulongedza katundu ndi kusunga ayenera kulabadira chinyezi-umboni.
4. Zinc, mkuwa, lead, aluminiyamu, siliva, chitsulo, malata, chromium ndi mchere wina wolemera zitsulo zimatha kuyambitsa njira yamadzimadzi ya CMC. Kupatula mchere wopangidwa ndi lead acetate, mpweyawo ukhoza kusungunukanso mu sodium hydroxide kapena ammonium hydroxide solution. .
5. Organic kapena inorganic zidulo adzachititsanso mvula yankho la mankhwala. Zochitika zamvula zimasiyanasiyana ndi mtundu ndi kuchuluka kwa asidi. Nthawi zambiri, mvula imachitika pamene pH ili pansi pa 2.5, ndipo imatha kubwezeredwa pambuyo pa kusalowerera ndale ndi zamchere.
6. Mu mchere monga calcium, magnesium ndi mchere wa tebulo, ulibe mphamvu yamvula pa njira ya CMC, koma imakhudza kuchepetsa kukhuthala.
7. CMC n'zogwirizana ndi zomatira madzi sungunuka, softeners ndi resins.
8. Mafilimu otengedwa ku CMC, omizidwa mu acetone, benzene, butyl acetate, carbon tetrachloride, castor oil, corn oil, ethanol, ether, dichloroethane, petroleum, methanol, methyl acetate, methyl ethyl acetate kutentha kwa firiji Ketone, toluene, turpentine, xylene, peanut oil, etc. zitha kusinthidwa mkati mwa maola 24
Nthawi yotumiza: Nov-07-2022