The thickening mechanism yehydroxyethyl cellulosendeyekuwedzera viscosity kuburikidza nekugadzirwa kwe intermolecular uye intramolecular hydrogen bonds, pamwe ne hydration uye cheni entanglement ye molecular cheni. Nokudaro, nzira yekukora yehydroxyethyl cellulose inogona kukamurwa kuita zvinhu zviviri: imwe ibasa re intermolecular uye intramolecular hydrogen bonds. Iyo hydrophobic main chain inoshamwaridzana nemamorekuru emvura akatenderedza kuburikidza nehydrogen bond, iyo inovandudza fluidity yepolymer pachayo. Uwandu hwezvimedu zvinoderedza nzvimbo yekusununguka kusununguka kwezvikamu, nokudaro kuwedzera viscosity yehurongwa; chechipiri, kuburikidza nekusungirirwa uye kupindirana kwecheni dzemamorekuru, maketani e cellulose ari mune matatu-dimensional network chimiro muhurongwa hwese, nokudaro achivandudza viscosity.
Ngationei kuti cellulose inobata sei mukuchengetedza kugadzikana kwegadziriro: kutanga, basa rehydrogen zvisungo rinodzivisa kuyerera kwemvura yakasununguka, rinoita basa rekuchengetedza mvura, uye rinobatsira kudzivirira kuparadzaniswa kwemvura; chechipiri, kupindirana kwemaketani e-cellulose Iro lap entanglement inoumba network-yakabatanidzwa network kana nzvimbo yakaparadzana pakati pe pigments, fillers uye emulsion particles, iyo inodzivisa kugadzirisa.
Iko kusanganiswa kwemaitiro maviri ari pamusoro ekuita anogonesahydroxyethyl cellulosekuve nekwaniso yakanaka kwazvo yekuvandudza kugadzikana kwekuchengetedza. Mukugadzirwa kwependi yelatex, HEC yakawedzerwa panguva yekurohwa uye kupararira inowedzera nekuwedzera kwesimba rekunze, shear velocity gradient inowedzera, mamorekuru anorongwa nenzira yakarongeka yakafanana negwara rekuyerera, uye iyo lap winding system pakati pemaketani emaketani inoparadzwa, izvo zviri nyore Kutsvedza pamwe chete, iyo viscosity system inoderera. Sezvo hurongwa huine huwandu hwakawanda hwezvimwe zvikamu (pigments, fillers, emulsions), urongwa uhwu hwakarongeka hahugoni kudzorera iyo yakasungirirwa mamiriro ekubatanidza uye kupindirana kunyange kana akaiswa kwenguva yakareba mushure mokunge pende yasanganiswa. Muchiitiko ichi, HEC inongovimba nehydrogen bonds. Mhedzisiro yekuchengetedza mvura uye kukora kunoderedza kukora kweHEC, uye mupiro weiyi nyika yekupararira kune kugadzikana kwekuchengetedza kwegadziriro inoderedzwawo saizvozvo. Zvisinei, HEC yakanyungudutswa yakaparadzirwa zvakafanana muhurongwa pane yakaderera inokurumidza kukurumidza panguva yekudzikisa, uye hurongwa hwemambure hwakagadzirwa ne-cross-linking yeHEC maketani hwakanga husina kukuvadzwa. Saka kuratidza yakakwirira thickening kunyatsoshanda uye kuchengetedza kugadzikana. Zviripachena, kuita panguva imwe chete yeidzi nzira mbiri dzekukora ndiyo nhanho yekusimba kweselulosi uye kuve nechokwadi chekuchengetera kugadzikana. Mune mamwe mazwi, iyo yakanyungudika uye yakapararira mamiriro e cellulose mumvura ichakanganisa zvakanyanya kukora kwayo uye mupiro wayo mukugadzikana kwekuchengetedza.
Nguva yekutumira: Kubvumbi-25-2024