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[Composites Science and Technology]Significantly improved interfacial properties and wave-transparent performance of PBO fibers/cyanate esterslaminated composites via introducing a polydopamine/ZIF-8 hybrid membrane
作者:?Zheng Liu, Xiaoli Fan, Muyi Han, Junliang Zhang, Lixin Chen*, Yusheng Tang, Jie Kong and Junwei Gu*
关键字:Polymer matrix wave-transparent composites
论文来源:期刊
具体来源:Composites Science and Technology
发表时间:2022年

Zheng Liu, Xiaoli Fan, Muyi Han, Junliang Zhang, Lixin Chen*, Yusheng Tang, Jie Kong and Junwei Gu*. Significantly improved interfacial properties and wave-transparent performance of PBO fibers/cyanate esterslaminated composites via introducing a polydopamine/ZIF-8 hybrid membrane. Composites Science and Technology, 2022, 223: 109426. 2020IF=8.528.(1区材料科学Top期刊)https://doi.org/10.1016/j.compscitech.2022.109426

Polydopamine hybrid zeolitic imidazolate framework-8 (PDA*ZIF-8) membrane, synthesized by zinc nitrate hexahydrate (ZnNO3?6H2O), 2-methylimidazole (2-MI), and dopamine (DA), uniformly grows on the surface of poly(p-phenylene-2, 6-benzobisoxazole) (PBO) fibers by heterogeneous nucleation method to obtain PBO@PDA*ZIF-8 fibers. PBO@PDA*ZIF-8 fibers are then applied as the reinforcement, bisphenol A dicyanate ester (BADCy) as the matrix, and PBO@PDA*ZIF-8 fibers/BADCy wave-transparent laminated composites are prepared by high-temperature molding. Results indicate that PDA*ZIF-8 membrane increases the surface roughness and chemical activity of PBO fibers. The interlaminar shear strength (ILSS) and flexural strength of PBO@PDA*ZIF-8 fibers/BADCy laminated composites are 45.3 and 656.3 MPa, respectively, which are increased by 23.4% and 11.7% compared with those of PBO fibers/BADCy composites (587.4 and 36.7 MPa). The dielectric constant and dielectric loss values at 1 MHz are 2.76 and 0.0046, respectively, lower than PBO fibers/BADCy (3.06 and 0.006). At 0.3~40 GHz, PBO@PDA*ZIF-8 fibers/BADCy laminated composites have excellent wave-transparent performance (The simulated wave-transparent rate is greater than 87%, d = 1.5~3.5 mm). Meanwhile, the corresponding volume resistivity and breakdown strength are 3.7×1015 Ω?cm and 23.61 kV/mm, higher than PBO fibers/BADCy composites (2.2×1015 Ω?cm and 17.69 kV/mm), respectively.

本文以六水合硝酸锌(ZnNO3?6H2O)、2-甲基咪唑(2-MI)和多巴胺(DA)为原料,通过异相成核法将聚多巴胺(PDA)杂化沸石咪唑骨架(PDA*ZIF-8)均匀包覆在聚对苯撑苯并二噁唑(PBO)纤维表面(PBO@PDA*ZIF-8),再与双酚A型氰酸酯(BADCy)树脂经高温模压制备PBO@PDA*ZIF-8纤维/BADCy层压透波复合材料。结果表明,PDA*ZIF-8膜增加了PBO纤维的表面粗糙度和化学活性。PBO@PDA*ZIF-8纤维/BADCy层压透波复合材料的层间剪切强度(ILSS)和弯曲强度分别为45.3 MPa和656.3 MPa,较PBO纤维/BADCy(ILSS和弯曲强度分别为36.7 MPa和587.4 MPa)分别提高了23.4%和11.7%。1 MHz下的介电常数和介电损耗角正切值分别为2.76和0.0046,均低于PBO纤维/BADCy(3.06和0.006);0.3~40 GHz下PBO@PDA*ZIF-8纤维/BADCy层压透波复合材料具有优异的透波性能(仿真透波率大于87%,d = 1.5~3.5 mm)。此外,PBO@PDA*ZIF-8纤维/BADCy层压透波复合材料的体积电阻率、击穿电压分别为3.7×1015 Ω?cm和23.61 kV/mm,同样优于PBO纤维/BADCy的2.2×1015 Ω?cm和17.69 kV/mm。