Carboxymethyl cellulose (Sodium Carboxymethyl cellulose), wotchedwa CMC, ndi polima pawiri wa pamwamba yogwira colloid. Ndiwochokera ku cellulose yopanda fungo, yosakoma, yopanda poizoni m'madzi. organic cellulose binder ndi mtundu wa cellulose ether, ndipo mchere wake wa sodium umagwiritsidwa ntchito nthawi zambiri, motero dzina lake lonse liyenera kukhala sodium carboxymethyl cellulose, ndiye 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 matope osakanizika ndi oponyedwa, komanso ndi chomangira chapanthawi kochepa chachilengedwe. Lili ndi zabwino izi:
1. Carboxymethyl cellulose imatha kudyedwa bwino pamwamba pa tinthu tating'onoting'ono, kulowa bwino ndikulumikizana ndi tinthu tating'onoting'ono, kotero kuti zosokonekera zamphamvu kwambiri zitha kupangidwa;
2. Popeza carboxymethyl cellulose ndi anionic polima electrolyte, akhoza kuchepetsa kugwirizana pakati particles pambuyo adsorbed pa tinthu pamwamba, ndi kuchita ngati dispersant ndi zoteteza colloid, motero kuwongolera kachulukidwe ndi mphamvu ya mankhwala ndi kuchepetsa afterburning Inhomogeneity wa. dongosolo la bungwe;
3. Pogwiritsa ntchito carboxymethyl cellulose monga binder, palibe phulusa pambuyo pa kuwotcha, ndipo pali zinthu zochepa zomwe zimasungunuka, zomwe sizidzakhudza kutentha kwa ntchito ya mankhwala.
Zogulitsa:
1. CMC ndi woyera kapena wachikasu fibrous granular ufa, zoipa, odorless, sanali poizoni, mosavuta sungunuka m'madzi, ndipo amapanga mandala viscous colloid, ndipo 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 kwachangu kwa kutentha, acidity ndi alkalinity ya yankho idzasintha. Mothandizidwa ndi kuwala kwa ultraviolet ndi tizilombo tating'onoting'ono, zingayambitsenso hydrolysis kapena oxidation, kukhuthala kwa yankho kudzachepa, ndipo ngakhale yankho lidzaipitsidwa. Ngati yankho liyenera kusungidwa kwa nthawi yayitali, zotetezera zoyenera zitha kusankhidwa, monga formaldehyde, phenol, benzoic acid, ndi organic mercury compounds.
2. CMC ndi yofanana ndi ma electrolyte ena a polima. Ikasungunuka, imayamba kutupa, ndipo tinthu tating'onoting'ono timamatira wina ndi mzake kuti tipange filimu kapena gulu la viscose, kotero kuti sangathe kumwazikana, koma kusungunuka kumachedwa. Choncho, pokonzekera njira yake yamadzimadzi, ngati tinthu tating'onoting'ono titha kunyowa mofanana poyamba, kusungunuka kumatha kuwonjezeka kwambiri.
3. CMC ndi hygroscopic. Chinyezi chapakati cha CMC mumlengalenga chimawonjezeka ndi kutentha kwa mpweya ndikuchepa ndi kutentha kwa mpweya. Pamene kutentha kwapakati pa chipinda ndi 80% -50%, chinyezi chofanana chimakhala pamwamba pa 26%, ndi chinyezi cha mankhwala osakwana 10%. Choncho, kulongedza katundu ndi kusunga ayenera kulabadira chinyezi-umboni.
4. Heavy zitsulo mchere monga nthaka, mkuwa, lead, aluminiyamu, siliva, chitsulo, malata, chromium, etc., angayambitse mpweya mu CMC amadzimadzi njira, ndi mpweya akadali kusungunuka mu sodium hydroxide kapena ammonium hydroxide solution. kupatula acetate yoyambira.
5. Organic kapena inorganic zidulo adzachititsanso mvula mu njira ya mankhwala. Kugwa kwamvula ndi kosiyana chifukwa cha mtundu ndi kuchuluka kwa asidi. Nthawi zambiri, mvula imapezeka pansi pa pH 2.5, ndipo imatha kubwezeredwa pambuyo pa kusalowerera ndale powonjezera mchere.
6. Mchere monga calcium, magnesium ndi mchere wa tebulo alibe mphamvu yamvula pa njira ya CMC, koma zimakhudza kuchepetsa kukhuthala.
7. CMC n'zogwirizana ndi zomatira madzi sungunuka, softeners ndi resins.
8. Filimu yojambulidwa ndi CMC imamizidwa mu acetone, benzene, butyl acetate, carbon tetrachloride, castor oil, mafuta a chimanga, ethanol, etha, dichloroethane, petroleum, methanol, methyl acetate, methyl ethyl ether kutentha kwa firiji Ketone, toluene, turpentine. , xylene, peanut oil, etc. sangasinthe mkati mwa maola 24.
Nthawi yotumiza: Jan-05-2023