A kind of polymer composite film capable of absorbing hydrogen and its preparation method
A technology of composite film and hydrogen absorption, applied in the chemical field of composite film, can solve the problems of inability to realize functions, high price, high use cost, and achieve the effect of solving difficult processing and forming, easy to widely use, and strong absorption capacity
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Embodiment 1
[0029] Synthesis of Polyvinylsiloxane
[0030] Measure 40mL of tetramethyltetravinylcyclotetrasiloxane into a single-necked flask equipped with mechanical stirring, then add 0.5mL of concentrated sulfuric acid as a catalyst, and stir at room temperature for 5h. Then add 100mL of n-hexane to dissolve the reaction product, the resulting solution is washed with saturated sodium bicarbonate solution and then washed three times with deionized water, after layering, the organic phase is dried with magnesium sulfate, and the solvent and low molecular volatiles are removed in vacuo to obtain the target resin . The molecular weight of the obtained polymer M w 8×10 4 g / mol, molecular weight distribution were 1.27.
[0031] The synthesis of silicon hydrogen-containing polysiloxane is similar to that of polyvinylsiloxane.
Embodiment 2
[0033] Preparation of Polyvinylsiloxane Containing Silicon Hydrogen Group
[0034] Measure 40 mL of tetramethyltetravinylcyclotetrasiloxane and add it into a one-necked flask equipped with mechanical stirring, and then add 5 mL of tetramethylcyclotetrasiloxane. After stirring evenly, 0.5 mL of concentrated sulfuric acid was added as a catalyst, and stirred at room temperature for 20 h. Then add 100mL of n-hexane to dissolve the reaction product, the resulting solution is washed with saturated sodium bicarbonate solution and then washed three times with deionized water, after layering, the organic phase is dried with magnesium sulfate, and the solvent and low molecular volatiles are removed in vacuo to obtain the target resin .
[0035] The molecular weight of the obtained polymer M w 3×10 4 g / mol, molecular weight distribution were 1.16.
Embodiment 3
[0037] Weigh 3.6g of hydrogen-containing polyvinylsiloxane resin, add 3mL of n-heptane, stir to dissolve, then add 1.4g of Pd / C (5wt%Pd) catalyst, disperse evenly, add 30mg of Cassette catalyst and stir evenly. Here, the card-type catalyst is a solution containing pt(0), and then the obtained solution is molded into a film with a thickness of 0.2 mm on a curing instrument at room temperature, and cured at room temperature for 3 days to obtain a black elastic film. The resulting black film was placed in an airtight container filled with 146KPa pure hydrogen and tested at room temperature. The amount of hydrogen absorbed at different times is shown in the table below:
[0038] time / hour
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