Umahluko phakathi kwe-hydroxypropyl starch ether kunye ne-cellulose ether

Ngoku abantu abaninzi abazi kakhulu malunga ne-hydroxypropyl starch ether.Bacinga ukuba kukho umahluko omncinci phakathi kwe-hydroxypropyl starch ether kunye nesitashi esiqhelekileyo, kodwa akunjalo.Ubungakanani be-hydroxypropyl starch ether esetyenziswa kwiimveliso zodaka lincinci kakhulu, kwaye inani elongezelelweyo le-polar linokufikelela kwimiphumo emihle.

I-Hydroxypropyl starch ether (HPS) ngumgubo omhlophe ococekileyo ofunyenwe ngokuguqula izityalo zendalo, ezifakwe kwi-etherified kakhulu, kwaye emva koko zomiswe, ngaphandle kweeplastiki.Yahluke ngokupheleleyo kwisitatshi esiqhelekileyo okanye isitashi esilungisiweyo.

Kwaye i-hydroxypropyl methyl cellulose, ekwabizwa ngokuba yi-hypromellose, i-hydroxypropyl methyl ebomvu ye-vitamin ether, kukusebenzisa i-cotton cellulose ecocekileyo njengento ekrwada, kwaye uyiphathe nge-lye kwi-35-40 ° C isiqingatha seyure, Cima, utyumze i-cellulose, kwaye ubudala ngokufanelekileyo kwi-35 ° C, ukwenzela ukuba iqondo eliqhelekileyo le-polymerization yefiber ye-alkali efunyenweyo ingaphakathi koluhlu olufunekayo.Beka i-alkali fiber kwi-kettle ye-etherification, yongeza i-propylene oxide kunye ne-methyl chloride ngokulandelelana, kwaye 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 atshisayo kwi-90 ° C ukuhlamba izinto zokwandisa umthamo, uze uchithe amanzi nge-centrifuge, kwaye ekugqibeleni uhlambe ngokuphindaphindiweyo ukungathathi hlangothi.Isetyenziswa 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 njengomxube wemveliso 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 i-dosage ye-HPMC malunga ne-20% -30%), kwaye ingadlala umphumo wokuqina , ukukhuthaza ngaphakathi. Ulwakhiwo, olunokumelana nokuqhekeka okungcono kunye nokusebenza okuphuculweyo.