摘要
用聚芳基乙炔树脂浸渍杉木粉,固化制得聚芳基乙炔/杉木粉复合材料,经高温炭化得到了一种新型木材陶瓷。用DTG分析了聚芳基乙炔树脂和复合材料的热稳定性,用XRD、LRS和SEM研究了炭化温度和树脂用量对木材陶瓷物相构成、断面微孔形态和抗压强度的影响。结果表明,木材陶瓷呈三维多孔结构,孔分布比较均匀;复合材料保持了很高的热分解温度(325℃)和残碳率(70%)。随着炭化温度升高,d002晶面间距由0.389 5 nm减小至0.353 0 nm,而微晶尺寸Lc和La有不同程度增加。木材陶瓷的开孔率随炭化温度的升高由31.5%减小至20.1%,而抗压强度由3.0 MPa增大至6.2 MPa。树脂/杉木粉质量比对木材陶瓷的微孔尺寸和形状有较大影响,但对石墨微晶尺寸影响不明显。
The composite of polyarylacetylene resin/fir powder was prepared by impregnating and thermoforming,and then a novel woodceramics was obtained by carbonizing the composite at high temperatures.Thermal stabilities of polyarylacetylene resin and the composite were analyzed by DTG.Influences of carbonization temperature and resin content on phase composition,pore morphology and compression strength were analyzed by XRD,LRS and SEM,respectively.The results show that the woodceramics was of a uniform three-dimensional porous structure.The decomposition temperature and char yield of the composite were 325 ℃ and 70% respectively.With increasing carbonization temperature,the（002） interlunar spacing decreased from 0.3895 nm to 0.3530 nm.However,the crystallite sizes L_c and L_a increased in different degrees.The open porosity of the woodceramics gradually decreased from 31.5% to 20.1% with the increase of carbonization temperature,while the compressive strength increased from 3.0 MPa to 6.2 MPa.The mass ratio of polyarylacetylene resin to fir powder had effect on the size and shape of the micropore of the woodceramics obviously,but a slight effect on the graphite crystallite size of the woodceramics.
出处
《应用化学》
CAS
CSCD
北大核心
2010年第4期418-423,共6页
Chinese Journal of Applied Chemistry
基金
国家自然科学基金资助项目(50773017)
