Ndezvipi zvinokonzeresa hupamhi hwehukuru pane hydroxyprupyl methylcellose:
Synthesis yeHydroxyPropyl methylcellose: Bata yakanatswa cell Isa iyo Alkali fiber muEthery Kettle, Wedzera profylene oxide uye methyl chloride mukutsvagisa, uye otera pa50-80 ° C kwemaawa mashanu, kudzvinyirira kwakanyanya kuri kwe 1.8mpa. Wobva wawedzera huwandu hwakakodzera hwe hydrochloric acid uye oxalic acid kumvura inopisa pa 90 ° c kugeza zvinyorwa kuti uwedzere vhoriyamu. Dehydrate mune iyo centrifuge. Geza nemvura kusvikira asina kwaakarerekera. Kana iyo nyoro-nyoro yezvinyorwa zvakadzikira kupfuura 60%, peta iyo inopisa mhepo rwizi pa13 ° c kusvika iyo yekunyorova ndeyekunyura pane 5%.
Iyo HPMC yakagadzirwa neiyo solvent nzira inoshandisa toluene uye isopropanol se solvent. Kana iko kugeza hakuna kunaka, vamwe vanonhuwira vanonhuwira. Parizvino, mhando yeiyo hydroxyprondropropyl methylcellose hpmc inosiyana zvakanyanya, uye mutengo unosiyana zvakanyanya, zvichiita kuti zviome kuti vatengi vaite sarudzo yakanaka. Iri ndiro dambudziko rekushambidza, hazvikanganise kushandiswa uye hapana dambudziko, HPMC yakachena haifanire kunhuhwirirai Amonia, kurwadza nedoro; HpMC HPMC inowanzo kunhuhwirira marudzi ese ekunhuhwirira, kunyangwe isina kunaka, ichanzwa kurema. Nekudaro, iyo hydroxyprusyl methylcellulose inogadzirwa nevazhinji vagadziri vane chinwiwa chakasimba uye kunhuhwirira kwakasimba. Unhu hutsinye hwakasiyana.
Hyplemllose inowanikwa nekukasira cotton yakanatswa neyakagadziriswa mvura kuti uwane alkaline cell Zvakanaka, pachave nekunhuhwirira, saka vashandisi vanogona kuishandisa nechivimbo.
Kutumira Nguva: Jun-09-2023