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SFPC课题组透波复合材料工作发表在Adv Fiber Mater上

Zheng Liu, Xiaoli Fan, Lei Cheng, Junliang Zhang*, Lin Tang, Yusheng Tang, Jie Kong and Junwei Gu*. Hybrid polymer membrane functionalized PBO fibers/cyanate esters wave-transparent laminated composites. Advanced Fiber Materials, 2022, 10.1007/s42765-021-00125-4. 2021即时因子10.458(中国科技期刊卓越行动计划高起点新刊)

https://doi.org/10.1007/s42765-021-00125-4

Abstract

Hybrid polymer membrane (TA-APTES), synthesized by tannic acid (TA) and aminopropyl trethoxysilane (APTES) based on the Schiff’s base and Michael addition reaction, is deposited on the surface of poly(p-phenylene-2, 6-benzobisoxazole) (PBO) fibers, and then grafted with epoxy-terminated polysesquisiloxane (POSS) to obtain POSS-g-PBO@TA-APTES fibers. The POSS-g-PBO@TA-APTES fibers reinforced bisphenol A dicyanate ester (BADCy) resins (POSS-g-PBO@TA-APTES fibers/BADCy) wave-transparent laminated composites are prepared. The interlaminar shear strength and flexural strength of POSS-g-PBO@TA-APTES fibers/BADCy composites are respectively enhanced from 36.7 and 587.4 MPa to 42.8 and 645.8 MPa, increased by 16.6% and 9.9% compared with those of PBO fibers/BADCy composites. At 1 MHz, the corresponding dielectric constant and dielectric loss are reduced to 2.85 and 0.0047, respectively, lower than those of PBO fibers/BADCy (3.06 and 0.006) composites. Meanwhile, the simulated wave transmittance rate of POSS-g-PBO@TA-APTES fibers/BADCy composites with the thicknesses of 1.5~3.5 mm is higher than 86.2% at 0.3~40 GHz. The volume resistivity and breakdown strength of POSS-g-PBO@TA-APTES fibers/BADCy composites are 2.8×1015 Ω?cm and 19.80 kV/mm, higher than PBO fibers/BADCy composites (2.2×1015 Ω?cm and 17.69 kV/mm), respectively. And the corresponding heat resistant index is 221.5oC, lower than PBO fibers/BADCy composites (229.6oC).

本文基于单宁酸(TA)氧化物与3-氨基丙基三乙氧基硅烷(APTES)的席夫碱和迈克尔加成反应,采用原位共沉积在聚对苯撑苯并二噁唑(PBO)纤维表面构筑聚合物膜(PBO@TA-APTES),经接枝聚倍半硅氧烷(POSS)得到POSS-g-PBO@TA-APTES纤维。再将POSS-g-PBO@TA-APTES纤维与双酚A型氰酸酯(BADCy)树脂复合,经浸胶-缠绕-高温模压制备POSS-g-PBO@TA-APTES纤维/BADCy层压透波复合材料。结果表明,TA-APTES膜和POSS实现了对PBO纤维表面的协同功能化修饰。POSS-g-PBO@TA-APTES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42.8 MPa和645.8 MPa,较未改性PBO纤维/BADCy层压透波复合材料(ILSS和弯曲强度分别为36.7 MPa和587.4 MPa)分别提升了16.6%和9.9%。1 MHz下的介电常数和介电损耗角正切值分别降低至2.85和0.0047,对应1.5~3.5 mm厚的层压透波复合材料在0.3~40 GHz均具备优异的透波性能(仿真透波率均大于86.2%)。POSS-g-PBO@TA-APTES纤维/BADCy层压透波复合材料的体积电阻率、击穿电压分别为2.8×1015 Ω?cm和19.80 kV/mm,同样优于PBO纤维/BADCy的2.2×1015 Ω?cm和17.69 kV/mm。相应的耐热指数为221.5oC,低于PBO纤维/BADCy层压复合材料的229.6oC。