Hydroxyethyl Cellulose (HEC)ndeye thickener, stabilizer uye rheology regulator inowanzoshandiswa mu latex pendi. Iyo inonyungudika nemvura polymer musanganiswa unowanikwa nehydroxyethylation reaction yeyakasikwa cellulose, ine yakanaka solubility yemvura, isina-chepfu uye kuchengetedzwa kwezvakatipoteredza. Sechikamu chakakosha chependi ye latex, nzira yekuwedzera ye hydroxyethyl cellulose inobata zvakananga rheological properties, brushing performance, kugadzikana, gloss, kuomesa nguva uye zvimwe zvakakosha zvepende ye latex.
1. Maitiro ekuita kwehydroxyethyl cellulose
Iwo makuru mabasa ehydroxyethyl cellulose mu latex pendi system anosanganisira:
Kukora uye kugadzikana: Mapoka ehydroxyethyl ari paHEC molecular chain anoumba hydrogen bond nemamorekuru emvura, ayo anosimudzira hydration yehurongwa uye anoita kuti latex pendi ive nani rheological properties. Inowedzerawo kugadzikana kwependi ye latex uye inodzivirira sedimentation ye pigments uye mafirita kuburikidza nekubatana nezvimwe zvinoshandiswa.
Rheological regulation: HEC inogona kugadzirisa rheological zvimiro zve latex pendi uye kugadzirisa kumiswa uye kupfekedza zvimiro zvepende. Pasi pemamiriro akasiyana-siyana ekuveura, HEC inogona kuratidza kuyerera kwakasiyana, kunyanya pamitengo yakaderera yekuveura, inogona kuwedzera viscosity yepende, kudzivirira kunaya, uye kuve nechokwadi chekufanana kwepende.
Hydration uye kuchengetwa kwemvura: Iyo hydration yeHEC mu latex pendi haigone kungowedzera viscosity yayo, asi zvakare kuwedzera nguva yekuomesa yepende yefirimu, kuderedza kudonha, uye kuve nechokwadi chekuita kwakanaka kwepende panguva yekuvaka.
2. Kuwedzera nzira ye hydroxyethyl cellulose
Nzira yekuwedzera yeHECine simba rakakosha pakuita kwekupedzisira kwepende ye latex. Nzira dzekuwedzera dzakajairika dzinosanganisira nzira yekuwedzera yakananga, nzira yekunyungudutsa uye nzira yekuparadzira, uye nzira yega yega ine zvakanakira nekuipira kwakasiyana.
2.1 Yakananga nzira yekuwedzera
Iyo yakananga yekuwedzera nzira ndeyekuwedzera hydroxyethyl cellulose yakananga kune latex pendi system, uye kazhinji inoda kukwana kwakakwana panguva yekusanganisa maitiro. Iyi nzira iri nyore uye iri nyore kushanda, uye yakakodzera kugadzirwa kwepende ye latex. Zvisinei, kana yakawedzerwa zvakananga, nekuda kweHEC zvidimbu zvakakura, zvakaoma kuparara uye kupararira nokukurumidza, izvo zvinogona kukonzera particle agglomeration, inokanganisa kufanana uye rheological properties ye latex pendi. Kuti udzivise mamiriro ezvinhu aya, zvinodikanwa kuve nechokwadi chekukurudzira nguva yakakwana uye tembiricha yakakodzera panguva yekuwedzera nzira yekukurudzira kuparara uye kupararira kweHEC.
2.2 Disolution nzira
Iyo nzira yekunyungudutsa ndeyekunyungudutsa HEC mumvura kuti iite yakagadziriswa mhinduro, uye wobva wawedzera mhinduro kune latex pendi. Iyo nzira yekunyungudutsa inogona kuve nechokwadi chekuti HEC yakanyungudika zvizere, kudzivirira dambudziko re particle agglomeration, uye inoita kuti HEC igovaniswa zvakaenzana mupende yelatex, ichitamba zvirinani kukora uye rheological kugadzirisa basa. Iyi nzira yakakodzera kune yakakwirira-yekupedzisira latex pendi zvigadzirwa zvinoda yakakwirira pendi kugadzikana uye rheological properties. Nekudaro, iyo nzira yekunyungudutsa inotora nguva yakareba uye ine zvakakwirira zvinodikanwa zvekumhanyisa kukurumidza uye tembiricha yekunyungudika.
2.3 Nzira yekuparadzira
Iyo nzira yekuparadzira inosanganisa HEC nezvimwe zvinowedzera kana zvinonyungudutsa uye inoiparadzira uchishandisa yakakwira shear dispersion midziyo kuita HEC yakaenzana kugovaniswa mulatex pendi. Iyo nzira yekuparadzira inogona kunyatso kudzivirira kuunganidzwa kweHEC, kuchengetedza kugadzikana kweiyo molecular chimiro, uye nekuwedzera kunatsiridza rheological zvimiro uye kubhurasha kuita kwepende yelatex. Iyo nzira yekuparadzira inokodzera kugadzirwa kwakakura, asi inoda kushandiswa kwehunyanzvi hwekuparadzira michina, uye kutonga kwekushisa uye nguva panguva yekuparadzira kwakaomarara.
3. Mhedzisiro yeHydroxyethyl Cellulose Addition Method paLatex Paint Performance
Yakasiyana HEC nzira dzekuwedzera dzinokanganisa zvakananga zvinotevera makuru zvivakwa zve latex pendi:
3.1 Rheological properties
Iyo rheological properties yeHECchiratidzo chekushanda kwelatex pendi. Kuburikidza nekudzidza kweHEC nzira dzekuwedzera, zvakaonekwa kuti nzira yekuparara uye nzira yekuparadzira inogona kuvandudza rheological properties ye latex pendi kupfuura nzira yakananga yekuwedzera. Muiyo rheological bvunzo, nzira yekunyungudika uye nzira yekuparadzira inogona kuvandudza viscosity yependi yelatex pachiyero chakaderera che shear, kuitira kuti pendi yelatex ive yakanaka yekuputira uye yekumisa zvivakwa, uye kudzivirira chiitiko chekudonha panguva yekuvaka.
3.2 Kugadzikana
Iyo HEC yekuwedzera nzira ine mhedzisiro yakakosha pakugadzikana kwepende ye latex. Latex pendi uchishandisa nzira yekunyungudutsa uye nzira yekuparadzira kazhinji inogadzikana uye inogona kudzivirira zvinobudirira kudonha kwe pigment uye mafirita. Iyo yakananga nzira yekuwedzera inoenderana nekusaenzana kweHEC dispersion, iyo inokanganisa kugadzikana kwepende, uye inowanzoitika kune sedimentation uye stratification, inoderedza hupenyu hwebasa repende yelatex.
3.3 Kupfekedza zvivakwa
Coating zvivakwa zvinosanganisira kuenzana, kuvhara simba uye ukobvu hwejasi. Mushure mokunge nzira yekuparara uye nzira yekuparadzira yakagamuchirwa, kugoverwa kweHEC kune yunifomu yakawanda, iyo inogona kunyatso kudzora fluidity yekuputira uye kuita kuti kuvhara kuratidze kuenzana kwakanaka uye kunamatira panguva yekugadzira. Iyo yakananga yekuwedzera nzira inogona kukonzera kusaenzana kugoverwa kweHEC particles, izvo zvinozokanganisa maitiro ekuputira.
3.4 Nguva yekuomesa
Kuchengetwa kwemvura kweHEC kune simba rinokosha panguva yekuoma kwepende ye latex. Iyo nzira yekunyungudutsa uye nzira yekuparadzira inogona kuchengetedza hunyoro mupende yelatex, kurebesa nguva yekuomesa, uye kubatsira kuderedza chiitiko chekunyanya kuomesa uye kuputika panguva yekuputira. Iyo yakananga nzira yekuwedzera inogona kuita kuti imwe HEC isanyungudika zvisina kukwana, nekudaro ichikanganisa kuomeswa kwekufanana uye kunaka kwekuputira kwepende yelatex.
4. Mazano ekugadzirisa
Nzira dzakasiyana dzekuwedzerahydroxyethyl cellulosevane simba guru pakushanda kwe latex pendi system. Iyo nzira yekunyungudutsa uye nzira yekuparadzira ine zvirinani mhedzisiro pane yakananga nzira yekuwedzera, kunyanya mukuvandudza rheological properties, kugadzikana uye kupfeka kwekuita. Kuti uwedzere kushanda kwependi yelatex, zvinokurudzirwa kushandisa nzira yekuparara kana nzira yekuparadzira panguva yekugadzirwa kwekugadzira kuti ive nechokwadi chekuparara kwakazara uye kupararira kweunifomu yeHEC, nokudaro kuvandudza kushanda kwakakwana kwepende yelatex.
Mukugadzirwa chaiko, nzira yakakodzera yeHEC yekuwedzera inofanira kusarudzwa maererano neforoma chaiyo uye chinangwa chependi yelatex, uye pahwaro uhwu, kunyandura, kunyungudika uye kuparadzira maitiro kunofanirwa kugadziridzwa kuti iwane yakanakira latex pendi kuita.
Nguva yekutumira: Nov-28-2024