I enei wa, he maha nga taangata kaore e tino mohio mo te hydroxypropyl starch ether. Ki ta ratou whakaaro he iti te rereketanga i waenga i te hydroxypropyl starch ether me te maaka noa, engari kaore. Ko te Hydroxypropyl starch ether e whakamahia ana i roto i te iti o nga hua o te kumete, a ko te nui o te taapiri o te rohe polar ka taea te whakatutuki i nga paanga o te kounga pai.
Ko te Hydroxypropyl starch ether (HPS) he paura pai ma i puta mai i nga tipu taiao hei rauemi mata, kua whakarereketia, kua tino whakahiatotia, katahi ka whakamarokehia, kaore he kirihou. He rereke rawa atu i te māngaro noa, te māngaro whakarerekē rānei
Ko te Hydroxypropyl methyl cellulose, e mohiotia ana ko te hypromellose me te hydroxypropyl methyl red vitamin ether, he mea hanga ki te cellulose miro tino parakore hei rauemi mata, ka rongoa ki te rei i te 35-40°C mo te hawhe haora, ka kohia, ka pakaruhia te cellulose, ka tika te tau. i te 35°C, na reira ko te tohu toharite o te polymerization o te muka alkali kua whiwhi kei roto i te awhe e hiahiatia ana. Kuhua te muka kawakore ki roto i te ketere etherification, tāpirihia te propylene oxide me te methyl chloride i roto i te raupapa, etherify i te 50-80°C mo te 5 haora, a ko te pehanga teitei ko te 1.8MPa. Kātahi ka tāpirihia te nui o te waikawa pūhaumāota me te waikawa oxalic ki te wai wera i te 90°C hei horoi i te rauemi ki te whakawhānui ake i te rōrahi, kātahi ka whakamarokehia ki te centrifuge, ka mutu ka horoi tonu kia noho kore. Ka whakamahia nuitia i roto i te hangahanga, te ahumahi matū, te peita, te rongoa, te ahumahi hoia me etahi atu mara, hei kaihoko hanga kiriata, hei here, hei whakamararatanga, hei whakapumau, hei peera, etc.
Ka taea te whakamahi i te hydroxypropyl starch ether hei whakauru mo nga hua ciment-based, hua gypsum-based me nga hua konupūmā kotakota. He pai te hototahi ki etahi atu whakaurunga whare. Ka whakamahia tahi me te hydroxypropyl methylcellulose ether HPMC, ka taea te whakaiti i te inenga o te hydroxypropyl methylcellulose (te nuinga o te taapiri 0.05% o te HPS ka taea te whakaiti i te inenga o te HPMC ma te 20% -30%), a ka taea e ia te mahi matotoru. Ka whakatairanga i te hanganga o roto, he pai ake te aukati kapiti me te pai ake o te mahi.
Wā tuku: Apr-13-2023