摘要
人工草坪综合性能较好,被大量应用于现代体育场中,但是废弃量急剧增加。废弃人工草坪由于组分的相容性较差,编织结构复杂,不易进行分离、分类及回收利用,造成了严重的环境污染和资源浪费,是亟待解决的关键问题。采用固相剪切碾磨加工技术回收利用废弃人工草坪(WAT),能将其在室温下进行超细粉碎和均匀分散,由粉体粒径及粒径分布控制相畴尺寸,利用熔融加工制备了高性能复合材料。采用激光粒度测试、扫描电子显微镜、高压毛细管流变仪及万能拉力机等测试方法研究了固相剪切碾磨加工技术对WAT粉碎效率、粉体形貌、加工流变性能、WAT复合材料相畴及力学性能的影响。结果表明,固相剪切碾磨加工技术制备的WAT超细粉体加工性能明显提高,表观黏度下降,平衡扭矩下降至4.8 N·m。WAT复合材料的相畴尺寸最小值为7.2μm,力学性能明显提高,拉伸强度可以达到16.3 MPa,拉伸模量可以达到312.7 MPa,断裂生长率提升至18%,为高质高效地回收利用WAT提供了新途径。
Artificial turf had excellent comprehensive performance and had been widely used in modern stadiums,producing also a huge amount of waste artificial turf(WAT).The poor compatibility of the compounds as well as the complicated woven structure of WAT made it hardly to be separated and recycled,resulting in the serious environment pollution and squander resources.A novel solid state shear milling(S3 M)technology was used to prepare uniformly dispersed ultrafine WAT powders at room temperature.The desired domain size was obtained by controlling the powder particle size and particle size distribution,and high-performance WAT composite were further prepared by melt processing.The effects of S3 M processing on the pulverization efficiency,powder morphology,processing rheological properties,phase domains and mechanical properties were investigated.The results showed that after S3 M process the balancing torque and phase domain size of WAT composite were decreased to 4.8 N·m and 7.2μm respectively.The WAT composite with tensile strength of16.3 MPa,tensile modulus of 312.7 MPa and elongation of 18%were successfully prepared.From above results,it could be concluded that S3 M technology was new method to efficiently recycle WAT for valued-products.
作者
江俊
李怡俊
杨双桥
JIANG Jun;LI Yijun;YANG Shuangqiao(State Key Laboratory of Polymer Materials Engineering,Polymer Research Institute of Sichuan University,Chengdu,Sichuan 610065,China)
出处
《塑料》
CAS
CSCD
北大核心
2020年第6期74-78,147,共6页
Plastics
基金
国家自然科学基金国际(地区)合作研究项目(51861165203)
中国工程院咨询研究项目(2019-XY-26)。