Manje abantu abaningi abazi okuningi nge-hydroxypropyl starch ether. Bacabanga ukuthi kukhona umehluko omncane phakathi kwe-hydroxypropyl isitashi ether kanye nesitashi esivamile, kodwa akunjalo. Inani le-hydroxypropyl starch ether elisetshenziswa emikhiqizweni yodaka lincane kakhulu, futhi inani elingeziwe le-polar lingathola imiphumela emihle yekhwalithi.
IHydroxypropyl starch ether (HPS) iyimpushana emhlophe ecolekile etholwe ngokushintsha izitshalo zemvelo, ezifakwe etherified kakhulu, bese zomiswa ngokufuthwayo, ngaphandle kwamapulasitiki. Ihluke ngokuphelele kunesitashi esivamile noma isitashi esiguquliwe.
Futhi i-hydroxypropyl methyl cellulose, eyaziwa nangokuthi i-hypromellose, i-hydroxypropyl methyl ether yevithamini ebomvu, iwukusebenzisa i-cotton cellulose ehlanzekile njengempahla eluhlaza, futhi uyiphathe nge-lye ku-35-40 ° C isigamu sehora, Cindezela, uchoboze i-cellulose, futhi ubudala ngokufanele ku-35 ° C, ukuze i-polymerization edingekayo ibe phakathi kwebanga elidingekayo le-alkali etholakalayo. Faka i-alkali fibre kuketela le-etherification, engeza i-propylene oxide ne-methyl chloride ngokulandelana, futhi uyifake 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 kunganciphisa umthamo we-HPMC cishe ngo-20% -30%), futhi ingadlala umphumela wokujiya , ukukhuthaza isakhiwo sangaphakathi, ngokumelana nokuqhekeka okungcono komsebenzi.
Isikhathi sokuthumela: Apr-24-2023