Mabhandi emvura ari kuwedzera kukosha mumusika wemazuva ano wekupotera nekuda kwezvivakwa zvawo zvine hushamwari kwezvakatipoteredza uye yakaderera inoputika organic compound (VOC) emissions. Nekudaro, zvichienzaniswa neyakajairwa solvent-based coatings, machira emvura anowanzo kutarisana nematambudziko maererano nekugadzira firimu uye kunamatira. Kuti ugadzirise nyaya idzi, zvimwe zvinoshanda zvinowedzera zvinowanzowedzerwa pakuumbwa. Hydroxyethyl cellulose (HEC) ndeimwe yeakawanda anoshandiswa gobvu uye anoshanda ekuwedzera, ayo anoita basa rakakosha mukuvandudza firimu-kuumba uye kunamatira kwemvura machira.
1. Basic zvimiro zvehydroxyethyl cellulose (HEC)
HEC isiri-ionic mvura-soluble polymer inowanikwa nekugadziriswa kwemakemikari echisikigo cellulose. Chimiro chayo chemolecular ine nhamba huru yemapoka e-hydroxyethyl, iyo inoita kuti ive yakanaka yekunyungudika kwemvura uye firimu-kugadzira zvinhu. Iwo makuru maitiro eHEC anosanganisira:
Kukora mhedzisiro: HEC inogona kunyatso wedzera viscosity yemvura yakadzika, ichivapa zvirinani rheology uye kugadzikana panguva yekupfeka.
Firimu-yekugadzira pfuma: HEC inogona kuumba yunifomu firimu panguva yekuomeswa kwekuputira, kuvandudza iyo yemuviri hunhu hwekupfeka.
Kugarisana: HEC ine kugarisana kwakanaka nemhando dzakasiyana dzemvura-based resins uye pigment, uye haina kujaira kune formula kusagadzikana kana stratification.
2. Mechanism yeHEC mukusimudzira firimu-kugadzira zvinhu mumvura-based coatings
HEC inogona kuwedzera zvakanyanya firimu-inogadzira zvivakwa mumvura-yakavakirwa machira, kunyanya nekuda kweiyo yakasarudzika molecular chimiro uye yemuviri nemakemikari zvinhu.
Kubatanidzwa kwemuviri kwecheni dzemamorekuru: HEC molecular cheni dzakareba uye dzinochinjika. Munguva yekuomeswa kwekuputira, aya mashetani echeni anogona kusungirirana pamwe chete kuti aite yemuviri yekubatanidza-yekubatanidza network, ichiwedzera simba remagetsi uye kuchinjika kwejasi.
Kudzora kwemvura: HEC ine mvura yakanaka yekuchengetedza uye inogona kusunungura zvishoma nezvishoma unyoro panguva yekuomeswa kwekuputira, kuwedzera nguva yekugadzira firimu, zvichiita kuti chifukidzo chigadzirwe zvakanyanya, uye kuderedza kuputika uye kuputika kunokonzerwa nekukurumidza kuoma nokukurumidza.
Surface tension regulation: HEC inogona kunyatso kudzikisa tension yemvura-based coatings, inosimudzira kunyorova uye kupararira kwejasi pamusoro peiyo substrate, uye kuvandudza kufanana uye flatness yejasi.
3. Mechanism yeHEC mukusimudzira kunamatira mumvura-based coatings
HEC inogona zvakare kuvandudza zvakanyanya kunamatira kwemvura-yakavakirwa machira, ayo anonyanya kuratidzwa mune zvinotevera zvinhu:
Interface Kuwedzeredzwa: Iyo yunifomu yekugovera HEC mujasi inogona kuwedzera nzvimbo yekubatana pakati peiyo yekuputira uye substrate pamusoro uye kuwedzera iyo interfacial bonding simba. Cheni yaro yemamorekuru inogona kupindirana nediki diki concave uye convex zvikamu zve substrate pamusoro kunatsiridza kunamatira kwemuviri.
Kemikari inoenderana: HEC isiri-ionic polymer ine yakanaka kuenderana kwemakemikari neakasiyana-siyana substrates (sesimbi, huni, plastiki, nezvimwewo), uye haisi nyore kukonzeresa maitiro emakemikari kana matambudziko ekubatana kwemukati, nekudaro kuvandudza kunamatira.
Plasticizing effect: HEC inogona kutamba imwe plasticizing basa mukuomeswa kwejasi, ichiita kuti jira riwedzere kuchinjika, kuitira kuti rigone kuchinjika kune diki deformation uye kuwedzera kwemafuta uye kuputika kweiyo substrate pamusoro, uye kuderedza kupepeta uye kuputika. yejasi.
4. Mienzaniso yekushandisa nemigumisiro yeHEC
Mumashandisirwo anoshanda, HEC inoshandiswa zvakanyanya mumhando dzakasiyana-siyana dzemvura-based coating formulations, zvakadai semvura-based architectural coatings, mvura-based wood coatings, mvura-based industrial coatings, etc. Nokuwedzera chiyero chakakodzera cheHEC, kuvaka. kushanda kwekuputira uye kunaka kwefirimu yekupedzisira yekuputira inogona kuvandudzwa zvakanyanya.
Mvura-based architectural coatings: Mumvura-yakavakirwa madziro pendi uye ekunze madziro pendi, kuwedzera HEC inogona zvinobudirira kuvandudza iyo coating's rolling uye brushing performance, zvichiita kuti kupfekedzwa kuve nyore kushandisa uye firimu rekuvhara riwedzere yunifomu uye rakatsetseka. Panguva imwecheteyo, kuchengetwa kwemvura kweHEC kunogonawo kudzivirira kuputika mufirimu yekuputira inokonzerwa nekuoma nekukurumidza.
Mvura-based wood pendi: Mumvura-based wood pendi, HEC's thickening uye film-forming properties inobatsira kuvandudza kujekesa uye flatness yefirimu yepende, zvichiita kuti huni huve hwakanaka uye huchisikigo. Uye zvakare, HEC inogona kusimudzira kudzivirira kwemvura uye kushomeka kwemakemikari kweiyo firimu yekuputira uye kuvandudza maitiro ekudzivirira ehuni.
Mvura-yakavakirwa maindasitiri machira: Mumvura-based metal coatings uye anti-corrosion coatings, HEC's adhesion enhancement inobvumira iyo firimu yekuputira kuti inamate zvirinani kune simbi pamusoro, kunatsiridza anti-corrosion kuita uye hupenyu hwebasa.
Sekuwedzera kwakakosha kunoshanda, hydroxyethyl cellulose (HEC) inonatsiridza zvakanyanya kuita kwese kwekuvhara mumvura-based coatings nekusimudzira firimu-kugadzira zvinhu uye kunamatira. Kukora kwayo, kuchengetwa kwemvura, kuumba firimu uye kukwidziridzwa kwemaitiro kunogonesa mvura-yakavakirwa mabhandi kuti iite zvakanaka mumamiriro akasiyana ekushandisa, nekudaro kusangana nemusika wekuda kwepamusoro-kuita, kugadzikana kwezvakatipoteredza. Mune ramangwana, nekuenderera mberi kwekuvandudzwa kwekuchengetedzwa kwezvakatipoteredza uye zvinodiwa zvekushanda, tarisiro yekushandiswa kweHEC mumvura-based coatings ichave yakakura.
Nguva yekutumira: Jul-12-2024