Hydroxyethyl cellulosechinhu chakakosha chinobva mu cellulose. Nekuda kwekubatsira kwezvinhu zvakawanda, zvinogona kudzokororwa, zvinoora, zvisina chepfu, zvinokwanisa kuenderana nehupenyu, uye goho guru, tsvakiridzo yayo nekushandiswa kwayo zvakakwezva vanhu vakawanda. . Kukosha kwe viscosity inhamba yakakosha yekushanda kwe hydroxyethyl cellulose. Mupepa rino, hydroxyethyl cellulose ine viscosity kukosha pamusoro pe 5×104mPa·s uye ash value iri pasi pe 0.3% yakagadzirwa nenzira ye liquid-phase synthesis kuburikidza ne alkalization uye etherification maitiro maviri-nhanho.
Maitiro ekugadzirisa alkalizing inzira yekugadzirira alkali cellulose. Mupepa rino, nzira mbiri dzekugadzirisa alkalizing dzinoshandiswa. Nzira yekutanga ndeyekushandisa acetone semusanganiswa. Cellulose raw material inoiswa zvakananga mu sodium hydroxide aqueous solution. Mushure mekunge basification reaction yaitwa, etherifying agent inowedzerwa kuti iite etherification reaction zvakananga. Nzira yechipiri ndeyekuti cellulose raw material inoiswa alkalizing mu aqueous solution ye sodium hydroxide ne urea, uye alkali cellulose yakagadzirwa nenzira iyi inofanira kusvinwa kuti ibvise lye yakawandisa isati yaitwa etherification reaction. Alkali cellulose yakagadzirwa nenzira dzakasiyana yakaongororwa ne infrared spectroscopy uye X-ray diffraction. Zvichienderana neproperties yezvigadzirwa zvakagadzirwa ne etherification reaction, nzira yekusarudza inosarudzwa.
Kuti paonekwe nzira yakanakisisa yekugadzira etherification, maitiro ekuita antioxidant, lye uye glacial acetic acid mu etherification reaction akaongororwa kutanga. Wobva wagadzira chirongwa chekuedza che single factor reaction, woona zvinhu zvine simba guru pakushanda kwe hydroxyethyl cellulose yakagadzirwa, uye shandisa viscosity ye 2% aqueous solution yechigadzirwa se reference index. Mhedzisiro yekuedza inoratidza kuti zvinhu zvakaita sehuwandu hwe diluent hwakasarudzwa, huwandu hwe ethylene oxide yakawedzerwa, nguva ye alkalization, tembiricha nenguva ye reaction yekutanga, tembiricha nenguva ye reaction yechipiri zvese zvine simba guru pakushanda kwechigadzirwa. Chirongwa che orthogonal experiment chine zvinhu zvinomwe uye mazinga matatu chakagadzirwa, uye effect curve yakatorwa kubva mumhedzisiro yekuedza inogona kuongorora nemaziso zvinhu zvekutanga nezvechipiri uye mafambiro epesvedzero yechinhu chimwe nechimwe. Kuti vagadzirire zvigadzirwa zvine viscosity yakakwira, chirongwa chekuedza chakagadziridzwa chakagadzirwa, uye chirongwa chakanakisa chekugadzirira hydroxyethyl cellulose chakazopedzisira chasarudzwa kuburikidza nemigumisiro yekuedza.
Zvimiro zve high-viscosity yakagadzirirwahydroxyethyl celluloseZvakaongororwa uye zvakaedzwa, kusanganisira kuona viscosity, dota, transmittance yechiedza, hunyoro, nezvimwewo, kuburikidza ne infrared spectroscopy, nuclear magnetic resonance, gas chromatography, X-ray diffraction, Thermogravimetric-differential thermal analysis nedzimwe nzira dzekutarisa dzinoshandiswa kuongorora nekuratidza chimiro chechigadzirwa, substituent uniformity, molar substitution degree, crystallinity, thermal stability, nezvimwewo. Nzira dzekuedza dzinoreva zviyero zveASTM.
Hydroxyethyl cellulose, chinhu chakakosha chinobva mu cellulose, chakwezva kutariswa nekuda kwehuwandu hwezvinhu zvayo zvekugadzira, zvinogona kudzokororwa, zvinoora, hazvina chepfu, zvinoenderana nehupenyu, uye goho rakakura. Kuwanda kwehydroxyethyl cellulose chiratidzo chakakosha chekushanda kwayo. Kuwanda kwehydroxyethyl cellulose yakagadzirwa kuri pamusoro pe5×104mPa·s, uye huwandu hwedota huri pasi pe0.3%.
Mupepa rino, high-viscosity hydroxyethyl cellulose yakagadzirwa nenzira ye liquid-phase synthesis kuburikidza ne alkalization uye etherification. Maitiro e alkalization ndeyekugadzirira alkali cellulose. Sarudza kubva munzira mbiri dze alkalization. Imwe ndeyekuti cellulose material inonamirwa zvakananga ne acetone se diluent mu aqueous sodium hydroxide solution, uye yobva yaitwa etherification reaction ne etherifying agent. Imwe ndeyekuti cellulosic material inonamirwa mumvura sodium hydroxide solution uye urea. Alkali yakawandisa mu alkali cellulose inofanira kubviswa isati yaitwa reaction. Mupepa iri, akasiyana-siyana alkali celluloses anodzidzwa ne infrared spectroscopy uye X-ray diffraction. Pakupedzisira, nzira yechipiri inoshandiswa zvichienderana nehunhu hwe etherification products.
Kuti pave nematanho ekugadzirira etherification, maitiro ekuita kwe antioxidant, alkali uye glacial acetic acid mukudya akadzidzwa. Zvinhu zvinokanganisa kugadzirwa kwehydroxyethyl cellulose zvakaongororwa nekuyedza kwe single factor. Zvichibva pakukosha kwe viscosity yechigadzirwa mu 2% aqueous solution. Mhedzisiro yekuyedza inoratidza kuti huwandu hwe diluent, huwandu hwe ethylene oxide, nguva ye alkalization, tembiricha uye nguva ye rehydration yekutanga neyechipiri zvine simba guru pakushanda kwechigadzirwa. Nzira yezvinhu zvinomwe nematanho matatu yakagamuchirwa kuti ione nzira yakanakisisa yekugadzirira.
Tinoongorora hunhu hwezvigadzirwa zvakagadzirwahydroxyethyl cellulose, kusanganisira viscosity, dota, kufambiswa kwechiedza, hunyoro, nezvimwewo. Hunhu hwechimiro, homogeneity inotsiva, molarity inotsiva, crystallinity uye kugadzikana kwekupisa zvakakurukurwa ne infrared, nuclear magnetic resonance, gas chromatography, X-ray diffraction, DSC neDAT, uye nzira dzekuyedza dzakashandisa zviyero zveASTM.
Nguva yekutumira: Kubvumbi-25-2024