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氧化石墨烯(GO)具有良好的耐热性和力学性能,可用于制备树脂基纳米复合材料,对树脂具有独特的改性效果,但分散性差却限制了GO对树脂基复合材料更好的改性效果。采用超支化聚硼酸酯(HBPB)与GO接枝得到氧化石墨烯-超支化聚硼酸酯(GO-HBPB),并将其用于双环苯并噁嗪树脂(B-BOZ)改性,不仅可解决GO分散性差的问题,还可利用GO-HBPB优异的耐热性,超支化结构,以及大量酚羟基端基对B-BOZ树脂噁嗪环的催化开环作用,使得GO-HBPB改性B-BOZ树脂(BOZ-GO-HBPB)具有比B-BOZ树脂更低的固化温度,在800℃(N2)下高达58.7%的残碳率,以及粗糙而柔韧的树脂浇注体断面形貌。
Graphene oxide (GO) has good heat resistance and mechanical properties, can be used to prepare resin-based nanocomposites, has a unique modification of the resin effect, but poor dispersion has limited the good GO modified resin-based composites Sexual effects. The graphene oxide-hyperbranched polyboric acid ester (GO-HBPB) was grafted by using hyperbranched polyboric acid ester (HBPB) and GO, and was used to modify Bicyclobenzoxazine resin (B-BOZ) GO-HBPB can not only solve the problem of poor dispersion, GO-HBPB can also take advantage of excellent heat resistance, hyperbranched structure, and a large number of phenolic hydroxyl end groups on the B-BOZ resin oxazine ring catalytic ring-opening effect, making GO-HBPB BOZ-GO-HBPB has a lower cure temperature than B-BOZ resin, up to 58.7% residual carbon at 800 ° C (N2) and a rough and pliable resin cast body cross- .