相关链接
联系方式
  • 通信地址:天津西青区宾水西道399号
  • 邮编:300387
  • 电话:022-83955362
  • 传真:
  • Email:zqs8011@163.com
当前位置:> 首页 > 论文著作 > 正文
Removal of crystal violet by clay/PNIPAm nanocomposite hydrogels with various clay contents
作者:Qingsong Zhang, Tingting Zhang, Tao He, Li Chen
关键字:poly(N-isopropylacrylamide) , crystal violet , hydrogel
论文来源:期刊
发表时间:2014年
The clay/poly(N-isopropylacrylamide) (PNIPAm) nanocomposite (CPN) hydrogels, using lithium magnesium silicate hydrate (LMSH) as a clay mineral physical cross-linker, with the mass ratio of NIPAm/LMSH ranging from 5 to 30 wt.% were prepared to remove crystal violet (CV) from aqueous solution. Morphology and temperature-sensitivity of hydrogels were investigated by SEM and DSC. Adsorption capacity and kinetic under different times, pH values and concentrations were evaluated by using UV/vis spectroscopy. The pore sizes of CPN hydrogels range from 30 to 50 μm, and volume phase transition temperature (VPTT) were 33–36 °C. The adsorption capacity (Qt) of CV onto CPN hydrogels at 25 °C increased quickly at initial 12 h, with a maximum value of 4.71 mg/g. At 37 °C, the Qt values are not more than 2 mg/g. The Qt values of CPN hydrogels increase 2–4 times when CV concentration was added from 10 to 30 mg/L, and increase 1–1.5 times as pH value increases from 3.0 to 8.9.