Hydroxypropyl methylcellulose yog ib hom cellulose ether uas tsis yog ionic ua los ntawm cov khoom siv polymer ntuj cellulose los ntawm ntau yam txheej txheem tshuaj lom neeg. Lawv yog ib hom hmoov dawb tsis muaj ntxhiab, tsis muaj ntxhiab, tsis muaj tshuaj lom, uas swells hauv dej txias thiab hu ua cov kua colloidal meej lossis me ntsis cloudy. Nws muaj cov yam ntxwv ntawm thickening, binding, dispersing, emulsifying, film-forming, suspending, adsorbing, gelling, surfactant, tswj cov dej noo thiab tiv thaiv colloid.
Cov hydroxypropyl methylcellulose zoo heev tuaj yeem daws tau qhov teeb meem ntawm kev khaws dej hauv qab qhov kub siab. Thaum lub caij kub siab, tshwj xeeb tshaj yog nyob rau hauv thaj chaw kub thiab qhuav thiab cov txheej txheem nyias nyias ntawm sab hnub ci, xav tau HPMC hydroxypropyl methylcellulose zoo kom txhim kho kev khaws dej ntawm cov slurry.
Cov hydroxypropyl methylcellulose zoo muaj qhov sib xws zoo tshwj xeeb. Nws cov pab pawg methoxy thiab hydroxypropoxy tau faib sib npaug zos raws li cov saw hlau cellulose molecular, uas tuaj yeem txhim kho cov pa oxygen ntawm cov hydroxyl thiab ether bonds thiab kev sib koom ua ke ntawm dej. Lub peev xwm los sib xyaw thiab tsim cov hydrogen bonds hloov cov dej dawb mus rau hauv dej khi, yog li tswj tau qhov evaporation ntawm dej los ntawm huab cua kub thiab ua tiav cov dej khaws cia siab.
Lub sijhawm tshaj tawm: Tsib Hlis-17-2023