Hydroxypropyl cellulose-silicone hybrid membrane and preparation method thereof

The invention discloses a hydroxypropyl cellulose-silicone hybrid membrane. The hybrid membrane comprises a support body, a transition layer and a separation layer, the support body is an alpha-Al2O3ceramic support body, the separation layer is a BTESO/HPC sol, and the BTESO/HPC sol is obtained by reacting 1,8-bis(triethoxysilyl)octane with hydroxypropyl cellulose. Cross-linking copolymerizationmakes hydroxyl-rich HPC stably distributed in a BTESO membrane network to make the structure of the membrane network dense and increase the water permeability and the salt ion rejection rate (apparentrejection rate) of the membrane, so the water permeability reaches 1.8 * 10 m .m.s.Pa, and the divalent sodium salt rejection rate reaches 99.0%. 本发明公开了一种羟丙基纤维素-有机硅杂化膜，由支撑体、过渡层和分离层组成，所述支撑体为α-AlO陶瓷支撑体，所述分离层为BTESO/HPC溶胶，所述BTESO/HPC溶胶通过1,8-二(三乙氧基硅基)辛烷与羟丙基纤维素反应得到。通过交联共聚使得富含羟基的HPC稳定地分布在BTESO膜网络中,膜网络结构更加致密,从而同时提高了膜对水渗透率和对盐离子的截留率(表观截留率)，使得水的渗透率达到1.8×10m·m·s·Pa，二价钠盐的截留率达到99.0％。