γ射线辐射对秸秆粉/PBS复合材料性能的影响%γ-ray radiation effect on properties of straw powder/PBS composite
河南省科学院博士后科研工作站,郑州 郑州大学化学与分子工程学院,郑州 河南省科学院同位素研究所有限责任公司,郑州 郑州大学材料科学与工程学院,郑州450001
2013-11-01
γ射线,辐射,秸秆粉,聚丁二酸丁二醇酯(PBS),复合材料
采用^60Co-γ射线对秸秆粉/聚丁二酸丁二醇酯(PBs)复合材料进行了辐射改性,研究了三烯丙基异氰脲酸酯(TAIC)的吸收剂量和辐射敏化剂含量对秸秆粉/PBS复合材料力学性能和热学性能的影响,并用扫描电镜(SEM)观察了秸秆粉/PBS复合材料在辐射改性前后的冲击断面.结果表明,当TAIC含量为2%时,秸秆粉/PBS复合材料经30kGy剂量辐射后,其拉伸强度和弯曲强度分别提高了25%和39.8%;辐射对秸秆粉/PBS复合材料的热稳定性能的影响不明显;辐射增强了秸秆粉和PBS之间的界面粘结性. %In recent years, with decreasing global fossil resources and increasing "white pollution", renewable and biodegradable materials attract more and more attentions. Poly (butylene succinate) (PBS) has good mechanical property, biodegradability and processing performance, which is the focus of hot topics in the study ofbiodegradable plastic materials, however, being soft and of high cost, it is still limited in application range. Purpose: In order to improve the mechanical and thermal properties, a series of wheat straw powder/PBS composites were prepared by melt extrusion, and then the 60Co-T ray was directly utilized to irradiate the straw powder/PBS composite. Methods: The influence of TAIC (triallyl isocyanurate) radiation absorbed dose and radiation sensitizer on the mechanical property and thermal performance of straw powder/PBS composite was investigated, and the impact fracture surface morphology of the composite was observed by SEM (scanning electron microscope). Results: The tensile strength and flexttral strength were enhanced with increasing radiation dosage, and then tend to be stable, the heat distortion temperature also increased but not significantly with increasing radiation dosage. The results show that when TAIC content is 2%, with straw powder/PBS composite irradiated by 30-kGy dose, the tensile strength and flexural strength are increased by 26% and 39.8%, respectively. Conclusion: The radiation modification of composite material has no effect on thermal stability, but do improve the tensile strength and flexural strength when tip to 2% of TAIC is integrated and irradiated by certain dose. The interface cohesiveness between straw powder and PBS is strengthened after radiation.
