纳米二氧化硅/聚氨酯仿木材料的制备与性能研究  

Research on the Preparation and Properties of Polyurethane Woodimitaion Materials Reinforced by Nano-silica

作　　者：黄琼涛 吴燕[2] 乐志威[2] 张磊[2] 

机构地区：[1]广东省宜华木业股份有限公司,广东汕头515834 [2]南京林业大学家具与工业设计学院,南京210037

出　　处：《家具》2014年第3期22-26,36,共6页Furniture

基　　金：广东宜华木业技术中心资助项目(YH-NL-20120108);中国自然基金青年基金项目(31100417);江苏省自然科学研究面上项目(13KJB220005);中国博士后面上资助项目(2012M510136)

摘　　要：以纳米SiO_2为改性剂,采用"一步法"制备聚氨酯仿木材料,并对仿木材料的抗弯性能、抗拉伸性能、抗压缩性能及纳米SiO_2对聚氨酯仿木材料的复合机理进行探讨。研究结果表明:添加纳米SiO_2使仿木材料的弯曲断裂力降低,使断裂形变量增加;当纳米SiO_2添加量为3%时,仿木材料的拉伸应力及相对伸长率最大。而当纳米SiO_2添加量为5%时,仿木材料的压缩形变量最大。红外光谱显示814 cm^(-1)处的吸收峰对应于Si-O-C键的吸收,表明纳米SiO_2与聚氨酯中的基团发生了化学反应,形成了一定的键合。In recent years, with the development of the research on organic-inorganic nano-hybrid materials, the use of inorganic nano powder as the filler synthetising the polyurethane composites was poplar and the properties of composites were improved. Nano-silica has many advantages, such as small grain size, big specific surface area and hydroxyl group on the surface. Adding nano-silica into polyurethane can improve the thermostability, water proof and mechanical properties, ect. The polyure tion materials were prepared by ＂one-step＂ processing and the nano-silica was used thane wood-imita- as the modifier in this paper. The properties of MOR, tensile, compression were evaluated and the recombination mecha- nism of polyurethane mimetic wood materials modified by nano-silica were also investigated. The results showed ： the bending fracture force decreased and the deformation increased with the addition of nano-silica. The tensile stress and relative elongation were up to the maximum values when the addition of nanosilica was 3%. However, the deformation of compression was at the maximum when nano-silica was 5% than those with other nano-silica contents. The FTIR spectra showed that the absorption peak of Si-O-C bond appeared at 814 cm^-1, which indicated the reaction occurred between nano-silica and the group in polyurethane.

关 键 词：纳米二氧化硅 聚氨酯 仿木材料 性能 

分 类 号：TQ630.4[化学工程—精细化工]