含苯并咪唑杂环结构聚酰亚胺纤维辐照接枝研究

Study on Irradiation Grafting of Polyimide Fibers Containing Benzimidazole Structure

为解决含芳杂环结构的聚酰亚胺(PI)纤维的接枝问题,采用共辐照法对具有不同芳杂环结构的PI纤维进行辐照改性,通过红外光谱、X射线电子能谱、吸水率分析等探究辐照接枝处理对含芳杂环结构的PI纤维结构与性能的影响。研究发现:含苯并咪唑结构的PI纤维表现出可辐照接枝性,其辐照接枝率可达5.7%;而不含杂环结构的PI纤维则难以辐照接枝;红外光谱与X射线电子能谱分析表明,丙烯酸单体接枝位点为PI纤维分子中的苯并咪唑杂环;经辐照改性后,所得改性PI纤维的亲水性及染料吸附能力得到有效改善,表现出在复合材料及吸附等领域巨大的应用潜力。

In order to solve the grafting problem of polyimide(PI)fibers containing aromatic heterocyclic structures.The PI fibers with different aromatic beterocyclic structures were modified by co-irradiation method.The effects of irradiation grafting treatment on the structure and properties of PI fibers with aromatic heterocyclic structure were analyzed by FTIR,XPS and water absorption analysis.The study PI fibers with benzimidazole units can be grafting via irradiation treatment,and the irradiation grafting rate was up to5.7%,while PI fibers without heterocyclic structure were difficult to be irradiated grafted.FTIR and XPS analysis showed that the grafting site of acrylic monomer was benzimidazole units in PI fibers.The hydrophilicity and dye adsorption capacity of the modified PI fiber was effectively improved,showed the application potential in the fields of composites and dye adsorption.