炭纤维和废弃聚乙烯在沥青中的分散行为及其性能

张茂荣; 方长青; 周世生; 程有亮; 胡京博

doi:10.1016/S1872-5805(16)60022-7

炭纤维和废弃聚乙烯在沥青中的分散行为及其性能

doi: 10.1016/S1872-5805(16)60022-7

张茂荣^1,2,
方长青^1,2,,
周世生^1,2,
程有亮²,
胡京博^1,2

1.
西安理工大学机械与精密仪器工程学院, 陕西西安 710048;
2.
西安理工大学印刷包装与数字媒体学院, 陕西西安 710048

基金项目: 国家自然科学基金（51172180，51372200）；新世纪优秀人才支持计划（NCET-12-1045）；陕西省教育厅服务地方专项计划项目（2013JC19）；西安理工大学优博基金资助项目（102-211208）.

详细信息

作者简介:
张茂荣,博士生.E-mail:zmr.1234@163.com

通讯作者:
方长青,教授.E-mail:fcqxaut@163.com

中图分类号: TQ342⁺.74
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- 被引次数: 0
出版历程
- 收稿日期: 2016-03-19
- 录用日期: 2016-08-29
- 修回日期: 2016-07-27
- 刊出日期: 2016-08-28

Modification of asphalt by dispersing waste polyethylene and carbon fibers in it

1.
School of Mechanical and Precision Instrument Engineering, Xi'an University of Technology, Xi'an 710048, China;
2.
Faculty of Printing, Packaging Engineering and Digital Media Technology, Xi'an University of Technology, Xi'an 710048, China

Funds: National Natural Science Foundation of China(51172180,51372200);Program for New Century Excellent Talents in University of Ministry of Education of China(NCET-12-1045);Local Service Program of Shaanxi Provincial Education Department(2013JC19);Excellent PhD dissertation Foundation of XAUT(102-211208).

摘要

摘要: 聚丙烯腈基炭纤维和废弃聚乙烯作为改性剂，采用热熔共混、絮凝处理、熔融共挤3种工艺对道路沥青进行改性，并研究了炭纤维分散性对沥青性能的影响。研究表明：炭纤维和废弃聚乙烯对沥青的改性为物理改性，随着炭纤维含量的增加，改性沥青的软化点和延度上升，针入度降低，改性沥青高温性能得到改善。过高的炭纤维含量将不利于分散而发生纤维团聚，当炭纤维含量超过0.1%，将造成改性沥青性能降低。微观观察发现，熔融共挤工艺较其他工艺，炭纤维与聚乙烯能较好的分散和结合，使得聚乙烯与炭纤维形成良好的类荆棘状吸附，在沥青中分散最佳，改性沥青的高温性和抗车辙性能得到较大提高。
- 包装废PE /
- 炭纤维 /
- 复合改性 /
- 沥青
Abstract: Recycled waste packaging polyethylene (WPE) and chopped polyacrylonitrile-based carbon fibers (PAN-CFs) were dispersed in molten asphalt at 170℃ with a shearing machine at 3 800 r/min for 60 min to modify its properties to meet the demands of motorway paving. WPE and PAN-CFs were mixed by three methods before the dispersion:(a) simple blending, (b) first dissolving WPE in xylene, then mixing and evaporating and (c) blending and extrusion to rods of 1mm diameterat 170℃ which were fed directly into the hot asphalt. The PAN-CF content was varied in the range 0 to 0.12 wt% while the WPE content was constant(4 wt%). Results indicate that WPE and PAN-CFs are dispersed in asphalt to form a network structure by the xylene-assisted mixing or blending-extrusion methods. The softening points, penetration degree and ductility are improved with increasing content of PAN-CFs up to 0.1 wt%. Aggregation of the two modifiers occurs beyond 0.12 wt% of PAN-CFs, which degrades the properties of the modified asphalts. A fiber length of 5 mm is optimum for their best dispersion in the asphalt. Segregation of the modifiers from the modified asphalts can be prevented by increasing the content of PAN-CFs. The blending-extrusion method is best to form a fine network structure, which achieves a best performance. A model is proposed to explain the observed dispersion behavior in asphalt.
- Waste packaging polyethylene /
- Carbon fibers /
- Composite modification /
- Asphalt

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参考文献(22)

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