Journal of Hazardous Materials 270 (2014) 137–143
Contents lists available at ScienceDirect
Journal of Hazardous Materials journal homepage: www.elsevier.com/locate/jhazmat
Recycling of asbestos tailings used as reinforcing fillers in polypropylene based composites Wensi Zhai, Yao Wang, Yuan Deng ∗ , Hongli Gao, Zhen Lin, Mao Li Beijing Key Laboratory for Advanced Functional Materials and Thin Film Technology, School of Material Science and Engineering, Beihang University, Beijing 100191, China
h i g h l i g h t s • Asbestos tailings were reused as reinforcing filler in polymers. • The AT/PP composites have better mechanical properties than those of neat PP. • The addition of MPS improved the mechanical properties of the composites.
a r t i c l e
i n f o
Article history: Received 10 August 2013 Received in revised form 24 January 2014 Accepted 29 January 2014 Available online 5 February 2014 Keywords: Asbestos tailings Mechanical properties Polypropylene composite
a b s t r a c t In this work, asbestos tailings were recycled and used as reinforcing fillers to enhance the mechanical properties of polypropylene (PP). A silane coupling agent was used to chemically modify the asbestos tailings to increase the compatibility between asbestos tailings and polypropylene matrix. Both raw and chemically treated asbestos tailings with different loading levels (from 3 to 30 wt%) were utilized to fabricate composites. Mechanical properties of these composites have been investigated by dynamic mechanical analysis, tensile test and notched impact test. Results showed that hybridization of asbestos tailings in the composites enhanced the mechanical properties of neat PP evidently, and treated asbestos tailings/PP composites yielded even better mechanical properties compared with those of raw asbestos tailings/PP composites. This recycling method of asbestos tailings not only reduces disposal costs and avoids secondary pollution but also produces a new PP-based composite material with enhanced mechanical properties. © 2014 Elsevier B.V. All rights reserved.
1. Introduction Asbestos tailings are hazardous solid wastes from the residue of asbestos mine, containing short asbestos fibers (length of the fiber
Contents lists available at ScienceDirect
Journal of Hazardous Materials journal homepage: www.elsevier.com/locate/jhazmat
Recycling of asbestos tailings used as reinforcing fillers in polypropylene based composites Wensi Zhai, Yao Wang, Yuan Deng ∗ , Hongli Gao, Zhen Lin, Mao Li Beijing Key Laboratory for Advanced Functional Materials and Thin Film Technology, School of Material Science and Engineering, Beihang University, Beijing 100191, China
h i g h l i g h t s • Asbestos tailings were reused as reinforcing filler in polymers. • The AT/PP composites have better mechanical properties than those of neat PP. • The addition of MPS improved the mechanical properties of the composites.
a r t i c l e
i n f o
Article history: Received 10 August 2013 Received in revised form 24 January 2014 Accepted 29 January 2014 Available online 5 February 2014 Keywords: Asbestos tailings Mechanical properties Polypropylene composite
a b s t r a c t In this work, asbestos tailings were recycled and used as reinforcing fillers to enhance the mechanical properties of polypropylene (PP). A silane coupling agent was used to chemically modify the asbestos tailings to increase the compatibility between asbestos tailings and polypropylene matrix. Both raw and chemically treated asbestos tailings with different loading levels (from 3 to 30 wt%) were utilized to fabricate composites. Mechanical properties of these composites have been investigated by dynamic mechanical analysis, tensile test and notched impact test. Results showed that hybridization of asbestos tailings in the composites enhanced the mechanical properties of neat PP evidently, and treated asbestos tailings/PP composites yielded even better mechanical properties compared with those of raw asbestos tailings/PP composites. This recycling method of asbestos tailings not only reduces disposal costs and avoids secondary pollution but also produces a new PP-based composite material with enhanced mechanical properties. © 2014 Elsevier B.V. All rights reserved.
1. Introduction Asbestos tailings are hazardous solid wastes from the residue of asbestos mine, containing short asbestos fibers (length of the fiber
