In-situ synchrotron radiation SAXS study of structural deformation memory effect of the interfacial region in Al2O3/LDPE composite film |
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| Affiliation: | 1. Key Laboratory of Engineering Dielectric and Its Application Ministry of Education, Harbin University of Science and Technology, Harbin, 150080, China;2. Beijing Synchrotron Radiation Facility, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100000, China;1. Interdisciplinary Graduate School of Science and Technology, Shinshu University, Ueda 386-8567, Japan;2. Department of Mechanical Engineering and Robotics, Shinshu University, Ueda 386-8567, Japan;3. Department of High-tech Textiles, College of Textiles, Donghua University, Shanghai 201620, China;4. College of Textile and Garments, Anhui Polytechnic University, Wuhu, Anhui 241000, China;1. Department of Engineering Science and Mechanics, Pennsylvania State University, University Park, PA 16802, USA;2. Department of Agricultural and Biological Engineering, The Pennsylvania State University, University Park, PA 16802, USA;3. Architectural Engineering Department, College of Engineering, Taibah University, P.O. Box 344, Al-Madina Al Munawara, Saudi Arabia;1. BRGM, Risks Division, F-45060 Orléans Cedex 2, France;2. Université Paris-Est, Laboratoire Navier (ENPC-IFSTTAR-CNRS), 77455 Marne la Vallée, France;1. Ioffe Institute, RAS, 194021, St.-Petersburg, Russia;2. Institute of Macromolecular Chemistry, NASU, 02160, Kyiv, Ukraine;1. Department of Advanced Fibro-Science, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto-shi, Kyoto 606-8585, Japan;2. Research Center, Toyobo Co., Ltd, 1-1, Katata 2-chome, Otsu, Shiga 520-0292, Japan |
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| Abstract: | This paper employs the SAXS technique to study the microstructure evolution of nano Al2O3/low-density polyethylene (LDPE) composite film during temperature increase and decrease (including interfacial layer thickness, mass fractal and surface fractal), and discusses the deformation memory effect (DME) mechanism. Compared with the case of pure LDPE, there are some new phenomena observed in the Al2O3/LDPE composite film, such as an interfacial layer and surface fractal. The experimental results showed that, when the temperature rose from 25 °C to 180 °C, the interfacial layer thickness of the composite film increased from 2.8 nm to 3.5 nm, and the surface fractal dimension increased from 1.2 to 2.0, with the lamellar crystal of the PE molecular chains melting. When the temperature dropped from 180 °C to 30 °C, the interfacial layer thickness decreased from 3.5 nm to 3.0 nm, and the surface fractal dimension changed from 2.0 to 1.2, with the PE molecular chains recrystallizing. We found that the DME of the interface layer is that thickness and area increase when temperature rises and decrease when temperature decreases. The addition of Al2O3 nanoparticles into the polymer results in the adsorption of space charges in the matrix onto the nanoparticles and in the interfacial regions, which efficiently inhibits the space charge accumulation of the composite material in the gradient electrical field. |
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| Keywords: | Synchrotron radiation SAXS Interface layer Polyethylene |
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