纳米α-Fe/PS复合材料的制备及其热力学性能研究
Synthesis and thermodynamics parameters of alpha iron nanoparticles/polystyrene composite
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摘要: 采用油包水(W/O)的微乳液体系制备了粒度为20~100 nm的αFe。对纳米Fe进行表面有机改性后分散到苯乙烯（St）单体中，得到分散均匀的Fe/St分散体系，用本体聚合的方法制备了纳米Fe/PS复合材料。利用XRD，TEM，FTIR，SEM及TGDSC分别研究了所得纳米Fe的性能、复合材料的结构、纳米Fe在PS中的分散情况以及掺杂量对纳米Fe/PS复合材料的热力学行为的影响。研究结果表明：增加纳米α-Fe的掺杂量能提高PS的降解率，降低降解温度，增大热分解的焓变。Abstract: Alpha iron nanoparticles with about 20~100 nm size were obtained in the W/O microemulsion system. The iron nanoparticles/PS composites were synthesized through a bulkpolymerization method using the dispersed mixed liquid including styrene and Fe nanoparticles modified with organic surface agent in advance. XRD, TEM, FTIR, SEM and TG-DSC were used respectively to measure the properties of iron nanoparticles, the microstructure of as-prepared composite samples, the distribution of iron nanoparticles in PS and the thermodynamic parameters of as-prepared composites. These studies reveal that the degradation and the enthalpy change of composites would increase with the doping dose of alpha iron nanoparticles increasing, but the temperature of composites degradation would reduce．
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Key words:
- iron nanoparticles /
- polystyrene /
- icf target materials /
- thermodynamics parameters
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