Xov xwm

Gel



Colloidal ib zaug los yog polymers nyob rau hauv ib qho kev sib haum xeeb los yog kua yog sib txuas rau ib leeg nyob rau qee qhov kev mob, kev tsim kom muaj qhov sib txawv ntawm lub network, qhov sib txawv ntawm cov qauv hauv nruab nrab yog ib qho dej nruab nrab ntawm cov kua (hauv cov gel qhuav tuaj yeem kuj yog nkev, kuj hu ua aerogels), xws li ib qho tshwj xeeb dispersion system hu ua gel. Tsis muaj kev mus. Sab hauv feem ntau muaj cov kua dej ntau. Piv txwv, ntshav gel, cov dej ntsiab lus agar tuaj yeem ncav ntau tshaj 99%. Yuav muab faib ua elastic gel thiab brittle gel. Thaum twg lub ywj siab gel los ntawm qhov nruab nrab dispersing, lub ntim shrinks yawm, thiab thaum cov dispersing nruab nrab yog absorbed, lub ntim expands dua, xws li gelatin thiab li ntawm. Thaum brittle gel los yog absorbs lub dispersed nruab nrab, cov duab thiab ntim yog unchanged, xws li silica gel. Tus txheej txheem ntawm txoj kev tsim ib gel los ntawm kev daws los yog Lawm hu ua cov nyhuv (gelation).