Njira yolimbikitsirahydroxyethyl celluloseNdikowonjezera kukhuthala kwa ma hydrogen kudzera mu kupanga ma hydrogen bonds apakati pa mamolekyulu ndi mkati mwa mamolekyulu, komanso kukhuthala kwa ma hydrogen ndi unyolo wa ma molekyulu. Chifukwa chake, njira yokhuthala ya hydroxyethyl cellulose ingagawidwe m'magawo awiri: choyamba ndi ntchito ya ma hydrogen bonds apakati pa mamolekyulu ndi mkati mwa mamolekyulu. Unyolo waukulu wa hydrophobic umagwirizana ndi mamolekyu amadzi ozungulira kudzera mu ma hydrogen bonds, zomwe zimapangitsa kuti polima yokha isamayende bwino. Kuchuluka kwa tinthu tating'onoting'ono timachepetsa malo oti tinthu tating'onoting'ono tiyende momasuka, motero kumawonjezera kukhuthala kwa dongosolo; chachiwiri, kudzera mu kukhuthala ndi kuphatikizika kwa ma molekyulu, ma cellulose chains ali mu kapangidwe ka netiweki ya magawo atatu mu dongosolo lonse, motero amawongolera kukhuthala.
Tiyeni tiwone momwe cellulose imathandizira pakukhazikika kwa dongosolo: choyamba, ntchito ya ma hydrogen bond imaletsa kuyenda kwa madzi omasuka, imachita gawo pakusunga madzi, komanso imathandizira kupewa kulekanitsidwa kwa madzi; chachiwiri, kuyanjana kwa unyolo wa cellulose. Kulumikizana kwa lap kumapanga netiweki yolumikizidwa kapena malo osiyana pakati pa utoto, zodzaza ndi tinthu ta emulsion, zomwe zimaletsa kukhazikika.
Ndi kuphatikiza kwa njira ziwiri zomwe zili pamwambapa zomwe zimathandizahydroxyethyl cellulosekukhala ndi luso labwino kwambiri lokonzanso kukhazikika kwa malo osungira. Pakupanga utoto wa latex, HEC yomwe imawonjezeredwa panthawi yogunda ndi kufalikira imawonjezeka ndi kuwonjezeka kwa mphamvu yakunja, kusinthasintha kwa liwiro la shear kumawonjezeka, mamolekyu amakonzedwa motsatira njira yolongosoka yofanana ndi njira yoyendera, ndipo dongosolo lozungulira pakati pa unyolo wa mamolekyu limawonongeka, zomwe zimakhala zosavuta kusuntha. Kuyenda limodzi, kukhuthala kwa dongosolo kumachepa. Popeza dongosololi lili ndi zinthu zina zambiri (ma pigments, fillers, emulsions), dongosololi lolongosoka silingathe kubwezeretsa mkhalidwe wolumikizana ndi kuphatikizika ngakhale litayikidwa kwa nthawi yayitali utoto utasakanizidwa. Pankhaniyi, HEC imangodalira ma hydrogen bonds. Zotsatira za kusunga madzi ndi kukhuthala zimachepetsa mphamvu yokhuthala yaHEC, ndipo gawo la kufalikira kwamtunduwu pakukhazikika kwa dongosololi limachepetsedwa moyenerera. Komabe, HEC yosungunuka idafalikira mofanana mu dongosololi pa liwiro lochepa loyambitsa panthawi yochepetsa, ndipo kapangidwe ka netiweki komwe kamapangidwa ndi kulumikizana kwa unyolo wa HEC sikunawonongeke kwambiri. Motero kuwonetsa kukhuthala kwakukulu komanso kukhazikika kwa kusunga. Mwachiwonekere, kuchitapo kanthu nthawi imodzi kwa njira ziwirizi ndiko maziko a kukhuthala bwino kwa cellulose ndikuwonetsetsa kuti kukhazikika kwa kusunga kuli bwino. Mwanjira ina, kusungunuka ndi kufalikira kwa cellulose m'madzi kudzakhudza kwambiri kukhuthala kwake komanso momwe amathandizira kukhazikika kwa kusunga.
Nthawi yotumizira: Epulo-25-2024