A functionalized boron nitride nanosheet/mxene/polybenzimidazole composite film with high thermal conductivity and preparation method
A composite film and benzimidazole technology, applied in the field of composite materials, can solve the problems of insufficient thermal conductivity and other problems, and achieve the effects of simple method, excellent thermal conductivity and wide application prospects
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Embodiment 1
[0038] A preparation method of a composite film containing 1wt% boron nitride nanosheet / MXene mixed filler, the specific steps are as follows:
[0039] (1) The boron nitride powder was calcined under nitrogen gas in a tube furnace at 1000°C for 3h.
[0040] (2) Take 1 g of calcined boron nitride powder and 5 g of urea and put them in a round-bottomed flask, under nitrogen gas, and heated to 140° C. in an oil bath for melting reaction for 6 hours.
[0041] (3) After the reaction is completed, the solid is dispersed in 500ml of deionized water, and ultrasonically stripped for 10h to obtain a dispersion, and then the dispersion is centrifuged at 3000rpm for 10min to obtain a supernatant; the supernatant is filtered and deionized water is used. The filter cake is washed, wherein the filtering method is preferably suction filtration, and the collected solids are dried at 60° C. for 10 h to obtain urea-functionalized boron nitride nanosheets.
[0042] (4) Put 1g of Ti 3 AlC 2 Gra...
Embodiment 2
[0046] A preparation method of a composite film containing 5wt% boron nitride nanosheet / MXene mixed filler, the specific steps are as follows:
[0047] (1) The boron nitride powder was calcined under nitrogen gas in a tube furnace at 1000°C for 3h.
[0048] (2) Take 1 g of calcined boron nitride powder and 5 g of urea and put them in a round-bottomed flask, under nitrogen gas, and heated to 140° C. in an oil bath for melting reaction for 6 hours.
[0049] (3) After the reaction is completed, the solid is dispersed in 500ml of deionized water, and ultrasonically stripped for 10h to obtain a dispersion, and then the dispersion is centrifuged at 3000rpm for 10min to obtain a supernatant; the supernatant is filtered and deionized water is used. Washing, wherein the filtration method is preferably suction filtration, and the collected solids are dried at 60° C. for 10 h to obtain urea-functionalized boron nitride nanosheets.
[0050] (4) Put 1g of Ti 3 AlC 2 Gradually and slowly...
Embodiment 3
[0054] A preparation method of a composite film containing 10wt% boron nitride nanosheet / MXene mixed filler, the specific steps are as follows:
[0055] (1) The boron nitride powder was calcined under nitrogen gas in a tube furnace at 1000°C for 3h.
[0056] (2) Take 1 g of calcined boron nitride powder and 5 g of urea and put them in a round-bottomed flask, under nitrogen gas, and heated to 140° C. in an oil bath for melting reaction for 6 hours.
[0057] (3) After the reaction is completed, the solid is dispersed in 500ml of deionized water, and ultrasonically stripped for 10h to obtain a dispersion, and then the dispersion is centrifuged at 3000rpm for 10min to obtain a supernatant; the supernatant is filtered and deionized water is used. Washing, wherein the filtration method is preferably suction filtration, and the collected solids are dried at 60° C. for 10 h to obtain urea-functionalized boron nitride nanosheets.
[0058] (4) Put 1g of Ti 3 AlC 2 Gradually and slowl...
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