以苯并噁嗪树脂为浸渍剂,通过浸渍/碳化(PIC)工艺制备了炭/炭(C/C)复合材料,研究了该材料的密度分布和热力学性能,采用扫描电子显微镜观察了材料的微观结构,并与采用相同预制体的糠酮树脂基C/C复合材料进行了对比。结果表明,制备的苯并噁嗪树脂基C/C材料密度分布均匀,树脂炭与纤维之间界面结合良好,拉伸强度为80.28MPa,弯曲强度为245.5MPa,在800℃条件下X-Y向导热系数为8.054W/(m·℃),Z向导热系数为4.081W/(m·℃),在1000℃条件下热膨胀系数为1.973×10-6/℃,与糠酮树脂基复合材料相比,拉伸、弯曲性能与其相当,导热系数、热膨胀系数比其高。苯并噁嗪树脂在制备C/C复合材料领域具有较好的应用前景。
Benzoxazine resin matrix C/C composite was prepared by PIC process with benzoxazine resin as impregnant,and its mechanical and thermal properties were tested and studied its microstructure under SEM.The results shown that the density distribution was uniform,and the interface between resin carbon and carbon fiber was bonded well,the tensile strength was 80.28MPa,the bending strength was 245.5MPa,the Thermal conductivity was 8.054W/(m·℃) and 4.081W/(m·℃) along radial and axial directions at 800℃,respectively,the thermal expansion coefficient was 1.973×10-6/℃ at 1000℃.Compared with the furfural acetone resin matrix C/C composite,the tensile and bending properties were equal,and the thermal conductivity and thermal expansion coefficient were higher than that of the composite.The benzoxazine resin had a good application prospect in the preparation of C/C composite.
[1] 顾宜,钟赤锋,谢美丽.用于RTM成型工艺的苯并噁嗪树脂及其复合材料[J].复合材料学报,2000,17(4):33-38.
[2] Hyun J K,Zdencla B,Ishida H,et al.Synthesis and thermal characterization of polybenzoxazines based on acetylene-functional monomers[J].Polym,1999,40(23):6565-6574.
[3] Xin N,Ishida H.Phenolic materials via ring-opening polymerization of benzoxazines:effect of molecular structure on mechanical and dynamic mechanical properties[J].Polymer Science Part B-polymer Physics,1994,32:921-932.
[4] Ishida H,Allen D J.Physcial and mechanical characterization of near-zero shrinkage polybenzoxazines[J].J Polym Sci Part B,1996,34:1019-1035.
[5] Ishida H,Allen Douglas J.Mechanical chatacterization of copolymers based on benzoxazine and epoxy[J].Polymer,1996,37(20):4487-4499.
[6] 向海,顾宜.新型酚醛树脂―苯并噁嗪树脂的研究进展[J].高分子材料科学与工程,2004,20(3):1-6.
[7] Ishida H,Allen D.Rheological characterisation during cure of near-zero shrinkage polybenzoxazines[J].ACS Polym Mater Sci Engng,1995,73:496-514.
[8] Wang Y X,Ishida H.Cationic ring-opening polymerization of benzoxazines[J].Polymer,1999,40:4563-4577.
[9] 周红英,张晓虎,邹武,等.糠酮树脂炭及其炭/炭复合材料微观结构与性能研究[J].固体火箭技术,2007,30(3):26-31.
[10] 周绍建,苏君明,苏哲安,等.树脂炭含量对C/C复合材料性能的影响[J].新型炭材料,2001,16(1):49-55.
[11] 王玉泉.C/C复合材料的显微和精细结构的研究[D].北京:清华大学,2004.
[12] 吴小军,刘博,韩明,等.软硬混编预制体增强沥青基4D-C/C材料弯曲行为[J].炭素技术,2014,33(5):34-40.
[13] 韩杰才,胡平,张幸红,等.超高温材料的研究进展[J].固体火箭技术,2005,28(4):28-34.
[14] 周红英,刘建军,黄寒星.碳化温度对炭/炭复合材料微观结构及热性能的影响[J].宇航材料工艺,2005,35(2):47-55.
[15] 奚同庚.无机材料热物性学[M].上海:上海科学技术出版社,1981,102-107.
[16] 李艳,崔红,郑蕊,等.无纬布/网胎叠层针刺C/C材料的制备及性能[J].新型炭材料,2017,32(1):56-62.
[17] Taylor C A,Wayne M F,Chiu Wilson K S,et al.Heat treatment of thin carbon films and the effect on residual stress,modulus,thermal expansion and microstructure[J].Carbon,2003,41(10):1867-1879.
[18] 赵建国,李克智,李贺军,等.炭/炭复合材料热膨胀性能的研究[J].材料热处理学报,2006,27(6):1-7.
基金资助
国家自然科学基金(21676163)
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