【作者】 丁杰；

【导师】 申士杰；

【作者基本信息】 北京林业大学 ， 木材科学与技术， 2008， 硕士

【摘要】 利用玄武岩连续纤维增强塑料(BFRP:Basalt Fiber Reinforced Polymer)增强木制材料,可以克服木制材料固有的缺陷,提高木材的使用价值,实现劣质木材的优化利用,大大拓宽木制材料在建筑领域,包括建筑以及桥梁等基础设施上的应用。本论文主要进行了三个方面的研究:(1)采用正交试验设计,考察了成型工艺参数(温度、压力、时间)对玄武岩连续纤维增强酚醛树脂复合材料(PF-BFRP)主要力学性能的影响;(2)考察了环氧树脂含量对玄武岩连续纤维增强环氧树脂复合材料拉伸性能的影响;(3)进行了玄武岩连续纤维增强结构用胶合板的研制。得出如下结论:(1)成型工艺参数(温度、压力、时间)对于PF-BFRP复合材料的弯曲性能的影响大小次序为压力>时间>温度,其中压力对弯曲性能的影响最为明显;各项工艺参数对于PF-BFRP复合材料的拉伸性能的影响均不明显。PF-BFRP复合材料的最佳工艺参数温度为180℃、热压压力为7MPa、热压时间为40min。采用此工艺条件所制得的PF-BFRP复合材料的弯曲强度为465MPa,弯曲模量为13.5GPa,拉伸强度为196.4MPa,拉伸模量为9.4GPa。(2)玄武岩连续纤维增强环氧树脂复合材料的拉伸强度随树脂含量的增加,先上升后下降,拉伸模量随树脂含量的增加而逐渐降低。当树脂含量为40%-45%时,玄武岩连续纤维增强环氧树脂复合材料的拉伸性能较佳,对应的拉伸强度为250MPa左右,拉伸模量为12GPa左右。(3)采用玄武岩连续纤维增强结构用胶合板是可行的,在不同组坯方式下,增强后的复合板与普通结构用胶合板相比,弯曲强度提高了1～2倍。其中二次成型的三层玄武岩连续纤维增强酚醛树脂/HMR处理结构用胶合板的弯曲强度由未增强前的50MPa增加到130MPa.(4)木材表面经偶联剂HMR处理,可以大大提高了BFRP/木材复合材料的胶接性能。更多还原

【Abstract】 Using BFRP(Basalt Fiber Reinforced Polymer) to reinforce wood composites can overcome the intrinsic faults of wood, and increase the value of wood. This technology has realized the utilization of inferior timber, which greatly developed the applications in constructions, including civil residential houses, business buildings and pavements, bridges and so on. This thesis is mainly about three aspects:(1) adopting orthogonal test to research PF-BFRP composites manufacturing factors, including temperature, pressure and time;(2) study the relationship between resin content and tension properties of epoxy BFRP composites; (3)study the bonding properties of PF-BFRP/structural plywood composite. Following conclusions are drawn:(1) For the bending properties of PF-BFRP composites, influence size of three factors is pressure>time>temperature, particularly, pressure influence the bending strength extremely obviously .For the tension properties of PF-BFRP composites, three factors do not influence the tension properties obviously. Influence size is also very close. The optimum technics are A3B2C3, which are molding temperature 180℃, heat pressure 7MPa, gluing time 40min. In this case, bending strength of PF-BFRP composite is 465MPa, modules of bending is 13.5GPa,tension strength is 196.4MPa and MOE is 9.4GPa。(2) Tension strength of epoxy BFRP increases first and then decreases with the increment of resin content. However, MOE increases with the increment of resin content. When the resin content is 40%-45%, the tension properties of epoxy BFRP are best. Correspondingly, tension strength is about 250 MPa and MOE is about 12 GPa.(3) It is available that using continuous basalt fiber to reinforce structural plywood. Bending strength of reinforced structural plywood composite increases 100~200%. Bending strength of second molding-3 layer basalt fiber BFRP/HMR treated structural plywood increases from 50MPa to130MPa.(4) HMR can improve bonding properties of BFRP/wood composites dramatically.更多还原