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Materials 2017, 10(5), 456; doi:10.3390/ma10050456

Effect of Surface-Modified TiO2 Nanoparticles on the Anti-Ultraviolet Aging Performance of Foamed Wheat Straw Fiber/Polypropylene Composites

1
Key Laboratory of Bio-based Material Science and Technology (Ministry of Education), Northeast Forestry University, Harbin 150040, China
2
Wood Engineering Department, Liaoning Forestry Vocational-Technical College, Shenyang 110101, China
3
College of Arts and Design, Qiqihar University, Qiqihar 161000, China
*
Author to whom correspondence should be addressed.
Academic Editor: Homayoun Hadavinia
Received: 20 March 2017 / Revised: 16 April 2017 / Accepted: 19 April 2017 / Published: 26 April 2017
(This article belongs to the Special Issue Improving Performance of Nanocomposite Materials)
View Full-Text   |   Download PDF [10551 KB, uploaded 26 April 2017]   |  

Abstract

Surface modification and characterization of titanium dioxide (TiO2) nanoparticles and their roles in thermal, mechanical, and accelerated aging behavior of foamed wheat straw fiber/polypropylene (PP) composites are investigated. To improve the dispersion of nanoparticles and increase the possible interactions between wheat straw fiber and the PP matrix, the surface of the TiO2 nanoparticles was modified with ethenyltrimethoxy silane (A171), a silane coupling agent. The grafting of A171 on the TiO2 nanoparticles’ surface was characterized by Fourier transform infrared spectroscopy (FTIR). The wheat straw fibers treated with A171 and modified TiO2 nanoparticles were characterized by FTIR and thermogravimetric analysis (TGA). FTIR spectra confirmed that the organic functional groups of A171 were successfully grafted onto the TiO2 nanoparticles and wheat straw fibers, and the modified TiO2 nanoparticles were adsorbed onto the wheat straw fibers. Thermogravimetric analysis showed that a higher thermal stability of the wheat straw fiber was obtained with the modified TiO2 nanoparticles. The flexural, tensile, and impact properties were improved. A higher ultraviolet (UV) stability of the samples treated with modified TiO2 nanoparticles was exhibited by the study of the color change and loss in mechanical properties. View Full-Text
Keywords: surface-modified TiO2 nanoparticles; foamed wheat straw fiber/polypropylene composites; mechanical properties; thermostability; UV stability surface-modified TiO2 nanoparticles; foamed wheat straw fiber/polypropylene composites; mechanical properties; thermostability; UV stability
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Xuan, L.; Han, G.; Wang, D.; Cheng, W.; Gao, X.; Chen, F.; Li, Q. Effect of Surface-Modified TiO2 Nanoparticles on the Anti-Ultraviolet Aging Performance of Foamed Wheat Straw Fiber/Polypropylene Composites. Materials 2017, 10, 456.

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