Hydroxyethyl cellulose (HEC)is a water-soluble cellulose derivative ine good thickening, film-forming, moisturizing, stabilizing, and emulsifying properties. Naizvozvo, inoshandiswa zvakanyanya muminda yakawanda yemaindasitiri, kunyanya Inoita basa rinokosha uye rakakosha mupendi yelatex (inozivikanwawo sependi yemvura).
1. Zvinhu zvakakosha zve hydroxyethyl cellulose
Hydroxyethyl cellulose musanganiswa wemvura unonyungudika wepolymer unowanikwa nemakemikari ekugadzirisa cellulose mamorekuru (kuunza mapoka ehydroxyethyl pamamorekuru ecellulose). Zvikuru zvayo zvinosanganisira:
Kunyungudika kwemvura: HEC inogona kunyungudika mumvura kuti igadzire mhinduro ine viscous yakanyanya, nekudaro ichivandudza rheological properties yejasi.
Kuomesa mhedzisiro: HEC inogona kuwedzera zvakanyanya viscosity yepende, ichiita latex pendi ive yakanaka yekuputira zvivakwa.
Adhesion uye firimu-inogadzira zvivakwa: HEC mamorekuru ane imwe hydrophilicity, iyo inogona kuvandudza mabatiro ekubata kweiyo coating uye kuita kuti iyo coating iwedzere yunifomu uye yakatsetseka.
Kugadzikana: HEC ine kugadzikana kwakanaka kwekushisa uye kugadzikana kwemakemikari, inogona kuramba yakagadzikana panguva yekugadzirwa uye kuchengetwa kwekuputira, uye haigoni kuparara.
Yakanaka sagging kuramba: HEC ine yakakwira sagging kuramba, iyo inogona kuderedza sagging chiitiko chepende panguva yekuvaka uye kugadzirisa maitiro ekuvaka.
2. Basa re hydroxyethyl cellulose mu latex pendi
Latex pendi ipendi yakavakirwa pamvura inoshandisa mvura seyakanyungudutsa uye polymer emulsion sechinhu chikuru chekugadzira firimu. Iyo inoshamwaridzana nemhoteredzo, isina chepfu, isingatsamwisi uye inokodzera mukati uye kunze kwemadziro kupenda. Kuwedzerwa kwehydroxyethyl cellulose kunogona kuvandudza zvakanyanya mashandiro elatex pendi, iyo inonyatso kuratidzwa mune zvinotevera zvinhu:
2.1 Kukora mhedzisiro
Mukugadzira latex pendi, HEC inonyanya kushandiswa seyakakora. Pamusana pemvura-inonyunguduka maitiro eHEC, inogona kukurumidza kunyungudika mune aqueous solvents uye kuumba network network kuburikidza ne intermolecular interactions, zvakanyanya kuwedzera viscosity ye latex pendi. Izvi hazvigone chete kuvandudza kupararira kwepende, zvichiita kuti ive yakakodzera kubhurashi, asi zvakare kudzivirira pende kubva pakudonha nekuda kwekuderera kwakadzika viscosity panguva yekupenda maitiro.
2.2 Kuvandudza mashandiro ekuvaka kwemajasi
HECinogona kunyatso gadzirisa iyo rheological maitiro e latex pendi, kuvandudza sag kuramba uye fluidity yepende, kuve nechokwadi chekuti pendi inogona kuvharwa zvakaenzana pamusoro peiyo substrate, uye kudzivirira zvisingadiwe zviitiko zvakaita semabhubhu uye kuyerera mamaki. Mukuwedzera, HEC inogona kuvandudza kunyorova kwepende, ichibvumira pende yelatex kuti ikurumidze kuvhara pamusoro pepamusoro pakupenda, kuderedza kukanganisa kunokonzerwa nekuvhara kusina kuenzana.
2.3 Wedzera kuchengetwa kwemvura uye kuwedzera nguva yekuvhura
Semushonga wepolymer une simba rekuchengetedza mvura, HEC inogona kunyatso kuwedzera nguva yekuvhura yepende yelatex. Nguva yekuvhura inoreva nguva iyo pendi inoramba iri mumamiriro ekupenda. Kuwedzerwa kweHEC kunogona kuderedza kubuda kwemvura, nokudaro kuwedzera nguva inoshandiswa yepende, zvichiita kuti vashandi vekuvaka vave nenguva yakawanda yekucheka nekuputira. Izvi zvakakosha pakushandiswa kwakatsetseka kwependi, kunyanya kana kupenda nzvimbo dzakakura, kudzivirira nzvimbo yependi kuti isaoma nekukasira, zvichiita kuti pave nemavara ebhurashi kana kupfeka zvisina kuenzana.
2.4 Kuvandudza kunamatira kwekunamatira uye kudzivirira kwemvura
Mune latex pendi yekuputira, HEC inogona kukwidziridza kunamatira pakati pepende uye pamusoro peiyo substrate kuti ive nechokwadi chekuti jira haridonhe nyore. Panguva imwecheteyo, HEC inovandudza kusapinda kwemvura kwependi ye latex, kunyanya munzvimbo dzine hunyoro, iyo inogona kunyatso kudzivirira kupenya kwemvura uye kuwedzera hupenyu hwebasa rejasi. Uye zvakare, iyo hydrophilicity uye kunamatira kweHEC inogonesa latex pendi kuti igadzire machira akanaka pane akasiyana ma substrates.
2.5 Kuvandudza kugadzirisa kupikisa uye kufanana
Sezvo zvikamu zvakasimba mupende ye latex zviri nyore kugadzirisa, zvichiita kuti pave nekusaenzana kwepende, HEC, sechinhu chinopisa, inogona kunyatsogadzirisa zvinhu zvinopesana nekugadzirisa kwepende. Nokuwedzera viscosity yekuputira, HEC inoita kuti zvimedu zvakasimba zviparadzirwe zvakaenzana mumucheka, kuderedza chidimbu chekugadzirisa, nokudaro kuchengetedza kugadzikana kwechifukidzo panguva yekuchengetedza uye kushandiswa.
3. Kushandisa zvakanakira hydroxyethyl cellulose mu latex pendi
Kuwedzerwa kwehydroxyethyl cellulose kune zvakakosha pakugadzira uye kushandisa latex pendi. Chekutanga pane zvese, HEC ine yakanaka kuchengetedzwa kwezvakatipoteredza maitiro. Kunyungudika kwayo kwemvura uye kusiri-chepfu kunovimbisa kuti latex pendi haiburitse zvinhu zvinokuvadza panguva yekushandiswa, ichisangana nezvinodiwa zvemazuva ano ane hushamwari pendi. Chechipiri, HEC ine yakasimba firimu-inogadzira zvivakwa, izvo zvinogona kuvandudza firimu mhando yepende yelatex, ichiita kuti iyo yekupfekedza ive yakasimba uye yakapfava, nekusimba kuri nani uye kuramba kusvibiswa. Pamusoro pezvo, HEC inogona kuvandudza kuyerera uye kushanda kwependi yelatex, kuderedza kuoma kwekuvaka, nekuvandudza kushanda zvakanaka.
Kushandiswa kwehydroxyethyl cellulosemu latex pendi ine zvakanakira zvakawanda uye inogona kunyatso kuvandudza rheological zvivakwa, kuita kwekuvaka, kunamatira uye kusimba kwepende. Nekuenderera mberi kwekuvandudzwa kwekuchengetedzwa kwezvakatipoteredza uye pendi yemhando yezvinodiwa, HEC, seyakakosha gobvu uye inovandudza mashandiro, yave imwe yeakakosha ekuwedzera mune yemazuva ano latex pendi. Mune ramangwana, nekuvandudzwa kwetekinoroji, kushandiswa kweHEC mupende ye latex kuchawedzera kuwedzerwa uye kugona kwayo kuchava kukuru.
Nguva yekutumira: Nov-14-2024