Xiangwen Zhou Yuefeng Zhu Ji Liang Suyuan Yu
材料科学技术（英文）
A novel technology to prepare styrene-butadiene rubber (SBR)/carbon nanotubes (CNTs) composites was developed by combining a spray drying method and a subsequent mechanical mixing process. The cross-linking degrees of the vulcanized composites increased gradually with the additive CNTs contents. By comparing with those of the pure SBR composites, the mechanical properties such as tensile strength, tear strength and hardness of the composites filled with CNTs at certain contents were dramatically improved almost by 600%, 250% and 70%, respectively. The fabrication of the CNTs filled with SBR composites by combination of the spray drying method and subsequent mechanical mixing process was effective for enhancing the reinforcement
effects of CNTs in rubbers. The novel technology can also open a new route for the modification and reinforcement on the nanocomposites with large amount of CNTs.
关键词:
Carbon nanotubes
,
styrene-butadiene rubber
,
spray drying
,
mechanical mixing
,
nanocomposite
,
mechanical property
张金玉
,
常建勇
,
苗旺
,
常照荣
功能材料
分别以化学共沉淀法和机械混合法制备了不同掺杂量的氢氧化镍,详细研究了掺杂方式和掺杂量对氢氧化镍晶体类型和结构的影响。XRD结果表明化学共沉淀法制得掺杂锌量在11%以下的氢氧化镍均为β型晶体结构,并且氢氧化镍的结晶程度随掺杂量的增加而提高,增加晶体缺陷,这些特征都将利于提高氢氧化镍的电化学性能;但共沉淀法掺杂量超过11%,机械混合法掺杂量超过1%后,在XRD图谱上出现明显的Zn（OH）2的特征峰,说明产品中出现了两种晶相,这对提高氢氧化镍的电化学性能是不利的。
关键词:
氢氧化镍
,
掺杂
,
化学共沉淀
,
机械混合
