Namuhla, abantu abaningi abazi okuningi nge-hydroxypropyl starch ether. Bacabanga ukuthi kukhona umehluko omncane phakathi kwe-hydroxypropyl isitashi ether kanye nesitashi esivamile, kodwa akunjalo. I-Hydroxypropyl isitashi ether isetshenziswa ngenani elincane emikhiqizweni yodaka, futhi inani elengeziwe lesifunda se-polar lingathola imiphumela emihle yekhwalithi.
IHydroxypropyl starch ether (HPS) iyimpushana emhlophe ecolekile etholakala ezitshalweni zemvelo njengezinto zokusetshenziswa, ezilungisiwe, ezifakwe etherified kakhulu, bese zomiswa ngokufuthwa, ngaphandle kwamapulasitiki. Ihluke ngokuphelele kunesitashi esivamile noma isitashi esiguquliwe
IHydroxypropyl methyl cellulose, eyaziwa nangokuthi i-hypromellose kanye ne-hydroxypropyl methyl ether yevithamini ebomvu, yenziwe nge-cellulose kakotini emsulwa njengempahla eluhlaza, iphathwa nge-lye ku-35-40°C isigamu sehora, icindezelwe, i-cellulose iyahluzwa, futhi iguge ngendlela efanele. ku-35°C, ukuze izinga elijwayelekile le-polymerization yefiber ye-alkali etholiwe ingaphakathi kwebanga elidingekayo. Faka i-alkali fibre kuketela le-etherification, engeza i-propylene oxide ne-methyl chloride ngokulandelana, i-etherify ku-50-80°C amahora angu-5, futhi ingcindezi enkulu imayelana ne-1.8MPa. Bese wengeza inani elifanele le-hydrochloric acid ne-oxalic acid emanzini ashisayo ku-90 ° C ukuze ugeze izinto zokwandisa ivolumu, bese uqeda amanzi nge-centrifuge, futhi ekugcineni ugeze ngokuphindaphindiwe ukungathathi hlangothi. Isetshenziswa kabanzi ekwakhiweni, embonini yamakhemikhali, upende, umuthi, imboni yezempi kanye neminye imikhakha, ngokulandelana njenge-ejenti yokwenza ifilimu, i-binder, i-dispersant, i-stabilizer, i-thickener, njll.
I-Hydroxypropyl starch ether ingasetshenziswa njengengxube yemikhiqizo esekwe usimende, imikhiqizo esekwe kwigypsum kanye nemikhiqizo ye-lime calcium. Inokuhambisana okuhle nezinye izixube zesakhiwo. Isetshenziswa kanye ne-hydroxypropyl methylcellulose ether HPMC, inganciphisa umthamo we-hydroxypropyl methylcellulose (ngokuvamile ukungeza u-0.05% we-HPS kungehlisa umthamo we-HPMC cishe ngo-20% -30%), futhi ingadlala indima yokuqina. Ithuthukisa ukwakheka kwangaphakathi, ukumelana nokuqhekeka okungcono nokusebenza okuthuthukisiwe.
Isikhathi sokuthumela: Apr-13-2023