1. State Key Laboratory of Organic–Inorganic Composites College of Chemical Engineering Beijing University of Chemical Technology Beijing 100029 China
2. Department of Mechanical Engineering City University of Hong Kong Hong Kong 999077 China
3. Department of Macromolecular Science and Engineering Case Western Reserve University Cleveland OH 44106 USA
4. Department of Mechanical and Construction Engineering Faculty of Engineering and Environment Northumbria University Newcastle upon Tyne NE1 8ST UK