Zhang C.,Key Laboratory of Bio Based Material Science and Technology of Ministry of Education |
Huang H.,Key Laboratory of Bio Based Material Science and Technology of Ministry of Education |
Chen C.,Key Laboratory of Bio Based Material Science and Technology of Ministry of Education |
Wang W.,Key Laboratory of Bio Based Material Science and Technology of Ministry of Education
Advanced Materials Research | Year: 2012
In this paper, instead of glass fiber, a bio-fiber (piemarker fiber) was used to reinforce unsaturated polyester (UP). UP resin was reinforced with piemarker fiber (PF) in a mold under hot pressing. The mechanical properties of the result composites were tested and hot pressing procedure was optimized. The optimum hot pressing technology was obtained. When hot pressing temperature was 90°C and mat was hot pressed for 1.5h. The mechanical properties of the composites indicated that: the optimum mass ratio of piemarker fiber to UP was 30:70, at which the flexural strength of the composite was 48.77MPa, the tensile strength was 29.082MPa, and the impact strength was 9.89KJ/m 2.
Hu D.,Key Laboratory of Bio based Material Science and Technology of Ministry of Education |
Wang L.,Key Laboratory of Bio based Material Science and Technology of Ministry of Education
Journal of Applied Polymer Science | Year: 2016
Hydroxypropyltrimethylammonium chloride cellulose (CM) was homogeneously synthesized in a NaOH/urea aqueous solution. CM was blended in a polyvinyl alcohol (PVA) matrix to produce composite films via co-regeneration from the alkaline solution. The PVA film and the blend films were characterized by Fourier transform infrared spectroscopy, X-ray diffraction measurements and scanning electron microscopy. The mechanical properties, water swelling ratio, hydrophobicity, light transmission, and antibacterial activity against Staphylococcus aureus and Escherichia Coli were also evaluated. The results showed that CM could interact with PVA by hydrogen bonding and exhibit an obvious reinforcement effect. The addition of CM improved the surface roughness, hydrophobicity and water swelling ratio, especially, the antibacterial activity. However, compared with neat PVA film, the elasticity and optical transmission decreased. The increased tensile strength, powerful antibacterial activity, and medium light transmission indicate that the biocompatible blend film will become an exceptional alternative in functional bio-material field. © 2016 Wiley Periodicals, Inc.