Preparation method of modified organosilicone dephenolized membrane
A silicon dephenolization membrane, organic technology, applied in the field of preparation of modified organosilicon membranes, can solve the problems of affecting the toughness of PDMS membranes, degraded separation performance, large amount of zeolite added, etc., achieves strong innovation and application prospects, and inhibits swelling. , to ensure the effect of operating stability
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Embodiment 1
[0014] 1) Preparation of 1% oleyl alcohol modified silicone pervaporation membrane
[0015] First, the hydroxyl-terminated polydimethylsiloxane and n-octane were mechanically stirred until dissolved to form a transparent solution; then, ethyl orthosilicate and the catalyst dibutyltin dilaurate were added and mechanically stirred for 20 minutes, and the mass ratio of the four was terminal Hydroxypolydimethylsiloxane: n-octane: tetraethyl orthosilicate: catalyst=33:60:5:2; Next, add oleyl alcohol, and the quality of oleyl alcohol is that of hydroxyl-terminated polydimethylsiloxane 1%, and mechanically stirred for 10 minutes to mix evenly. Finally, cast the obtained solution on the bottom membrane of ultrafiltration to form a film. After standing at room temperature for 4 hours, put the film into a vacuum drying oven at 60 degrees to dry for 8 hours.
[0016] 2) The 1% oleyl alcohol modified organosilicon pervaporation membrane prepared by the above method was used to test its ph...
Embodiment 2
[0020] 1) Preparation of 5% oleyl alcohol modified silicone pervaporation membrane
[0021] First, mechanically stir the hydroxyl-terminated polydimethylsiloxane and n-heptane until it dissolves to form a transparent solution; then, add orthosilicate and the catalyst dibutyltin dilaurate and mechanically stir for 5 minutes, and the mass ratio of the four is terminal Hydroxypolydimethylsiloxane: n-heptane: ethyl orthosilicate: catalyst=33:60:5:2; Next, add oleyl alcohol, the quality of oleyl alcohol is the quality of hydroxyl-terminated polydimethylsiloxane 5%, mechanically stirred for 2 minutes to mix evenly, and finally, cast the obtained solution on the nanofiltration bottom membrane to form a film, and after standing at room temperature for 5 hours, put the film in a vacuum drying oven at 80 degrees to dry for 12 hours.
[0022] 2) The 5% oleyl alcohol modified organosilicon pervaporation membrane prepared by the above method was used to test its phenol / water pervaporation ...
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