Mukugadzira uye hupenyu, silica gel inogona kushandiswa kuomesa N2, mhepo, hydrogen, gasi rechisikigo [1] zvichingodaro. Maererano neasidhi uye alkali, desiccant inogona kugoverwa kuva: acid desiccant, alkaline desiccant uye neutral desiccant [2]. Silica gel inoratidzika seine neutral dryer inoita seyakaoma NH3, HCl, SO2, etc. Zvisinei, kubva panheyo yekuona, silica gel inoumbwa ne-three-dimensional intermolecular dehydration ye orthosilicic acid molecules, muviri mukuru weSiO2, uye nzvimbo yacho yakafuma mumapoka e-hydroxyl (ona Mufananidzo 1). Chikonzero nei silica gel inogona kutora mvura ndechekuti iyo silicon hydroxyl boka riri pamusoro pe silica gel rinogona kuumba intermolecular hydrogen zvisungo nemamorekuru emvura, saka inokwanisa kushambadza mvura nekudaro kuita basa rekuomesa. Iko-inoshandura silica gel ine cobalt ions, uye mushure meiyo adsorption mvura yasvika pakuzara, iyo cobalt ions mu-ruvara-inoshandura silica gel inova hydrated cobalt ions, kuitira kuti yebhuruu silica gel inova pink. Mushure mekupisa iyo pink silica gel pa200 ℃ kwenguva yakati rebei, iyo hydrogen bond pakati pesilica gel nemamorekuru emvura inoputsika, uye iyo discolored silica gel inoshanduka bhuruu zvakare, kuitira kuti chimiro chechimiro che silicic acid uye silica gel inogona kushandiswa zvakare sezvakaratidzwa muMufananidzo 1. intermolecular hydrogen bonds neNH3 neHCl, nezvimwewo, uye panogona kunge pasina nzira yekuita se desiccant yeNH3 neHCl, uye hapana mushumo wakakodzera mumabhuku aripo. Saka zvakaguma nei? Nyaya iyi yakaita tsvakiridzo yekuedza inotevera.
Nguva yekutumira: Nov-14-2023
