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 kwistatshi esiqhelekileyo okanye isitashi esilungisiweyo.
Kwaye i-hydroxypropyl methyl cellulose, eyaziwa ngokuba yi-hypromellose, i-hydroxypropyl methyl ebomvu ye-vitamin ether, kukusebenzisa i-cotton cellulose ecocekileyo kakhulu njengento ekrwada, kwaye uyiphathe nge-lye nge-35-40 ° C isiqingatha seyure, Ukucudisa, ukutyumza i-cellulose, kunye nobudala ngokufanelekileyo kwi-35 ° C, ukuze i-avareji ye-polymer ye-fiber efunyenweyo idigri ye-alvareji efunekayo. 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 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 i-dosage ye-hydroxypropyl methylcellulose (ukongeza ngokubanzi i-0.05% ye-HPS inokunciphisa umthamo we-HPMC malunga ne-20% -30%), kwaye inokudlala umphumo wokuqina , ukukhuthaza isakhiwo sangaphakathi, kunye nokuphucula ukuchasana komsebenzi kunye nokuphucula ukusebenza kakuhle.
Ixesha lokuposa: Apr-24-2023