Kule mihla, abantu abaninzi abazi kakhulu malunga ne-hydroxypropyl starch ether. Bacinga ukuba kukho umahluko omncinci phakathi kwe-hydroxypropyl starch ether kunye nesitashi esiqhelekileyo, kodwa akunjalo. I-Hydroxypropyl starch ether isetyenziswe kwixabiso elincinci kwiimveliso zodaka, kwaye inani elongezelelweyo lommandla we-polar unokufikelela kwimiphumo emihle.
IHydroxypropyl starch ether (HPS) ngumgubo omhlophe ocolekileyo ofunyenwe kwizityalo zendalo njengezinto ezikrwada, zilungisiwe, zifakwe etherified kakhulu, emva koko zomiswe ngokutshizwa, ngaphandle kweeplasticizers. Yahluke ngokupheleleyo kwistatshi esiqhelekileyo okanye isitashi esilungisiweyo
IHydroxypropyl methyl cellulose, ekwaziwa ngokuba yi-hypromellose kunye ne-hydroxypropyl methyl ebomvu ye-vitamin ether, yenziwe nge-cotton cellulose esulungekileyo njengento ekrwada, iphathwe nge-lye ku-35-40 ° C kangangesiqingatha seyure, icudiswe, i-cellulose iyahluzwa, kwaye iguge ngokufanelekileyo. kwi-35 ° C, ukwenzela ukuba iqondo eliqhelekileyo le-polymerization yefiber ye-alkali efunyenweyo ingaphakathi koluhlu olufunekayo. Faka i-alkali fiber kwi-kettle ye-etherification, yongeza i-propylene oxide kunye ne-methyl chloride ngokulandelelana, i-etherify kwi-50-80 ° C kwiiyure ze-5, kwaye uxinzelelo oluphezulu malunga ne-1.8MPa. Emva koko faka inani elifanelekileyo le-hydrochloric acid kunye ne-oxalic acid kumanzi ashushu kwi-90 ° C ukuhlamba izinto zokwandisa umthamo, uze uchithe amanzi nge-centrifuge, kwaye ekugqibeleni uhlambe ngokuphindaphindiweyo ukungathathi hlangothi. Isetyenziswe ngokubanzi kulwakhiwo, kwishishini lekhemikhali, ipeyinti, iyeza, ishishini lomkhosi kunye namanye amacandelo, ngokulandelanayo njenge-ejenti yokwenza ifilimu, i-binder, dispersant, stabilizer, thickener, njl.
I-Hydroxypropyl starch ether ingasetyenziswa njenge-admixture yemveliso esekwe kwisamente, iimveliso ezisekwe kwigypsum kunye neemveliso ze-lime calcium. Inokuhambelana kakuhle kunye nezinye ii-admixtures zokwakha. Isetyenziswe kunye ne-hydroxypropyl methylcellulose ether HPMC, inokunciphisa idosi ye-hydroxypropyl methylcellulose (ukudibanisa ngokubanzi i-0.05% ye-HPS inokunciphisa idosi ye-HPMC malunga ne-20% -30%), kwaye ingadlala indima yokuqina. Ikhuthaza ukwakheka kwangaphakathi, ukumelana nokuqhekeka okungcono kunye nokuphuculwa kokusebenza.
Ixesha lokuposa: Apr-13-2023