Properties of Recycled and Modified Materials from Polypropylene Components in Vehicle
摘 要
报废汽车聚丙烯零部件经二次破碎、筛分后,采用高压电晕-静电分选技术进行二级分选提纯,对分选提纯工艺进行了优化;用由50%(质量分数,下同)8303K聚丙烯、30% 7467聚烯烃弹性体、3.5% KH-560硅烷偶联剂、3.5%聚乙烯蜡等组成的改性剂对提纯后的聚丙烯物料进行共混改性并注塑成型,研究了改性前后物料的力学及理化性能。结果表明:破碎筛分后,粒径在1.25 mm以下的物料以长条片状聚丙烯为主,混有少量玻璃纤维、塑料粉以及已解离铜丝;分选提纯时第一辊转速为114 r·min-1,第二辊转速为33 r·min-1,得到质量分数约78%的聚丙烯,而质量分数超过13%的金属被分选出;提纯得到的聚丙烯经改性后,其力学性能提高,满足汽车生产厂家的使用要求。
Abstract
After crushing twice and screening, polypropylene components in end-of-life vehicles were two-stage separated and purified by high-voltage corona-electrostatic separation technique, and the separation technique was optimized. The purified polypropylene materials were modified by the modifier composed of 50wt% 8303K polypropylene, 30wt% 7467 polyolefin elastomer, 3.5wt% KH-560 coupling agent, 3.5wt% polyethylene wax, etc., and were injection molded. The mechanical properties and physical and chemical properties of the materials before and after modification were studied. The results show that after crushing and screening, the materials with particle size below 1.25 mm mainly consisted of rod-sheet-like polypropylene and contained few glass fibers, plastic powders and peeled copper wires. In the process of separation and purification, with the rotation speed of the first roller of 114 r·min-1 and the second roller of 33 r·min-1, about 78wt% polypropylene materials were obtained, and over 13wt% metallic materials were separated. The mechanical properties of the purified polypropylene were improved after modification, meeting the requirements of automobile manufacturers.
中图分类号 U465.4 DOI 10.11973/jxgccl201712014
所属栏目 材料性能及应用
基金项目
收稿日期 2017/6/27
修改稿日期 2017/10/20
网络出版日期
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备注路洪洲(1981-),男,黑龙江大庆人,高级工程师,博士研究生
引用该论文: LU Hongzhou,MA Mingtu,LU Guimin. Properties of Recycled and Modified Materials from Polypropylene Components in Vehicle[J]. Materials for mechancial engineering, 2017, 41(12): 64~68
路洪洲,马鸣图,路贵民. 汽车聚丙烯零部件回收及其改性后物料的性能[J]. 机械工程材料, 2017, 41(12): 64~68
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【2】NOURREDDINE M. Recycling of auto shredder residue[J]. Journal of Hazardous Materials, 2007, 139(3):481-490.
【3】VERMEULEN I, VAN C J, BLOCK C, et al. Automotive shredder residue (ASR):Reviewing its production from end-of-life vehicles (ELVs) and its recycling, energy or chemicals' valorisation[J]. Journal of Hazardous Materials, 2011, 190(1):8-27.
【4】SAKAI S I, YOSHIDA H, HIRATSUKA J, et al. An international comparative study of end-of-life vehicle (ELV) recycling systems[J]. Journal of Material Cycles and Waste Management, 2014, 16(1):1-20.
【5】DU X, RESTREPO E, WIDMER R, et al. Quantifying the distribution of critical metals in conventional passenger vehicles using input-driven and output-driven approaches:A comparative study[J]. Journal of Material Cycles and Waste Management, 2015, 17(2):218-228.
【6】DUVAL D, MACLEAN H L. The role of product information in automotive plastics recycling:A financial and life cycle assessment[J]. Journal of Cleaner Production, 2007, 15(11):1158-1168.
【7】OI E, KIKUCHI E. Separation of polyvinyl chloride resin from shredded electric wire scrap using air table[J]. Resources Processing, 1998, 45(3):183-187.
【8】UENO I, WAKIMOTO K, OKADA T, et al. Development of new recycling process for ASR[J]. JSAE Review, 2002, 23(4):504-505.
【9】BISIO A L, XANTHOS M. How to manage plastics waste:Technology and market opportunities[M]. New York:Hanser Publishers, 1995.
【10】DODBIBA G, SHIBAYAMA A, MIYAZAKI T, et al. Triboelectrostatic separation of ABS, PS and PP plastic mixture[J]. Materials Transactions, 2003, 44(1):161-166.
【11】IUGA A, CALIN L, NEAMTU V, et al. Tribocharging of plastics granulates in a fluidized bed device[J]. Journal of Electrostatics, 2005, 63(6):937-942.
【12】路洪洲,马鸣图, 李志刚,等. 报废汽车塑料的资源化处理技术新进展[J]. 工程塑料应用, 2008, 36(7):76-79.
【13】DE MARCO I, CABALLERO B M, CABRERO M A, et al. Recycling of automobile shredder residues by means of pyrolysis[J]. Journal of Analytical & Applied Pyrolysis, 2007, 79(1):403-408.
【14】GALVAGNO S, FORTUNA F, CORNACCHIA G, et al. Pyrolysis process for treatment of automobile shredder residue:Preliminary experimental results[J]. Energy Conversion and Management, 2001, 42(5):573-586.
【15】ARZOUMANIDIS G G, MCINTOSH M J, STEFFENSEN E J. Catalytic pyrolysis of automobile shredder residue[R/OL].(1995-07-01)[2017-06-05]. http://web.anl.gov/PCS/acsfuel/preprintarchive/Files/40_4_CHICAGO_08-95_0873.pdf
【16】BREAM C E, HORNSBY P R. Comminuted thermoset recyclate as a reinforcing filler for thermoplastics Part I Characterisation of recyclate feedstocks[J]. Journal of Materials Science, 2001, 36(12):2965-2975.
【17】CUNLIFFE A M, JONES N, WILLIAMS P T. Pyrolysis of composite plastic waste[J]. Environmental Technology, 2003, 24(5):653-663.
【18】PICKERING S J. Recycling technologies for thermoset composite materials-Current status[J].Composites Part A:Applied Science and Manufacturing,2006,37(8):1206-1215.
【19】HARTT G N, CAREY D P. Economics of recycling thermosets[C]//SAE 1992 Transactions:Journal of Materials & Manufacturing-V101-5.[S.l.]:SAE International, 1992:920802.
【20】PICKERING S J, KELLY R M, KENNERLEY J R, et al. A fluidised-bed process for the recovery of glass fibres from scrap thermoset composites[J]. Composites Science and Technology, 2000, 60(4):509-523.
【21】路洪洲, 李佳, 郭杰,等. 基于可资源化的废弃印刷线路板的破碎及破碎性能[J]. 上海交通大学学报, 2007, 41(4):551-556.
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