Enhancement of thermal,mechanical and barrier properties of EVA solar cell encapsulating films by reinforcing with esterified cellulose nanofibres |
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| Institution: | 1. Nanotec?KMUTT Center of Excellence on Hybrid Nanomaterials for Alternative Energy, King Mongkut''s University of Technology Thonburi, (KMUTT), Bangkok 10140, Thailand;2. School of Energy, Environment and Materials, King Mongkut''s University of Technology Thonburi (KMUTT), Bangkok 1014, Thailand;3. Learning Institute, King Mongkut''s University of Technology Thonburi (KMUTT), Bangkok 10140, Thailand;1. Department of Mechanical Engineering, Faculty of Engineering, University of Malaya, 50603 Kuala Lumpur, Malaysia;2. Institute of Tropical Forestry and Forest Product, University Putra Malaysia, 43400 Selangor, Malaysia;3. Radiation Processing Technology, Malaysian Nuclear Agency, 43000 Kajang, Selangor, Malaysia;4. Department of Chemical and Environmental Engineering, Universiti Putra Malaysia, Selangor, Malaysia;1. The Nanotech Unit, Laboratorio de Materiales y Superficies and Departamento de Ingeniería Química, Facultad de Ciencias, Universidad de Málaga, Málaga 29071, Spain;2. Sunrise Gridfree Avda, Sor Teresa Prat.Prat, Complejo Municipal Tabacalera, Módulo 5, Smart-City – Urban, 29003 Málaga, Spain;3. The Nanotech Unit, Laboratorio de Materiales y Superficies and Departamento de Física Aplicada I, Facultad de Ciencias, Universidad de Málaga, Málaga 29071, Spain;1. CHOSE (Centre for Hybrid and Organic Solar Energy), Department of Electronic Engineering, University of Rome Tor Vergata, via del Politecnico 1, 00133 Rome, Italy;2. Smart Materials, Istituto Italiano di Tecnologia, Via Morego 30, 16163 Genova, Italy;3. Materials Characterization Facility, Istituto Italiano di Tecnologia, Via Morego 30, 16163 Genova, Italy;4. Nanochemistry, Istituto Italiano di Tecnologia, Via Morego 30, 16163 Genova, Italy |
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| Abstract: | Solar cell encapsulating film based on ethylene vinyl acetate copolymer (EVA) was modified by using bacterial cellulose (BC) nanofibres. Bacterial cellulose was chemically modified with propionic anhydride prior to compounding with EVA in a twin screw extruder. The effects of fibre content on the mechanical, thermal, optical and barrier properties of the EVA composite films were investigated. Better mechanical and barrier properties of the EVA films were obtained when the modified BC nanofibres were used. The results were ascribed to the different chemical functional groups on the fibre surface, as verified by FTIR spectra. Deacetylation of the EVA was delayed and visible light transparency of the EVA films above 75% was retained. Overall, our study showed that it was possible to improve the barrier properties of EVA film without sacrificing much transparency by using a suitable type and content of cellulose nanofibres. |
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| Keywords: | Cellulose nanofibres EVA Nanocomposite Encapsulant Solar cells |
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