Papers by Author: Chi Jiang

Paper TitlePage

Authors: Yong Feng Li, Duo Jun Lv, Chi Jiang, Yi Xing Liu, Hong Yue Zhang
Abstract: A new composite, wood-polymer composite, was fabricated by formation of poly (methyl methacrylate) in wood cellular structure. Methyl methacrylate (MMA) monomer and a few of 2,2'- azobisisobutyronitrile (AIBN) as an initiator, as well as several drops of pyrimidine as catalyst were first impregnated into wood porous structure under a pressure condition, and then initiated for thermal polymerization through a catalyst-thermal treatment. The mechanical properties of the composite were tested, and the composite was also analyzed by SEM and DSC to further correlate its performance. The results indicated that the modulus of rupture, modulus of elasticity, compression strength and hardness of Wood-PMMA Composite were improved by 68.28%, 110.27%, 62.43%, 357% over those of Untreated Wood, respectively. The SEM observations showed that PMMA generated and filled up wood pores under the employed conditions, and thus reinforced the mechanical properties of wood. DSC analysis suggested that Wood-PMMA Composite was more thermal stability than Untreated Wood as the formation of PMMA within wood pores.
640
Authors: Yong Feng Li, Yi Xing Liu, Feng Hu Wang, Duo Jun Lv, Chi Jiang
Abstract: Inspired from the natural porous structure of wood, a novel wood-polymer composite combining both advantages of wood with high strength-to-weight ratio as a natural renewable resource and polymer as a reinforcer was manufactured by synthesis of terpolymer of methyl methacrylate (MMA), Styrene (St) and Vinyl Acetate (VAc) inside wood. The three kinds of monomers with a few of 2,2'- azobisisobutyronitrile (AIBN) as an initiator, as well as some additives were first impregnated into wood porous structure under a pressure condition, and then initiated for terpolymerization through a catalyst-thermal treatment. The impregnating conditions containing pressure value and pressure time, and polymerizing crafts including heating temperature and heating time, as well as additive content were confirmed according to rate of monomer loading and rate of polymer loading inside wood. Results indicate that among these influencing factors, pressure and temperature were the significant influencing factors; and the rate of monomer loading and rate of polymer loading linearly positive correlated to them, respectively. SEM observation shows that the terpolymer fully filled in wood porous structure under the optimum manufacturing craft.
181
Authors: Duo Jun Lv, Yong Feng Li, Chi Jiang, Yue Hong Zhang, Yi Xing Liu
Abstract: A novel wood-based composite, Wood-PSt Composite, combining both advantages of wood and polymer was fabricated by impregnating styrene monomer into wood pores, followed by in-situ polymerization through a catalyst-thermal treatment inspired from the special porous structure. The manufacturing craft involving the impregnating craft and the polymerizing craft was studied and its structure was also observed by SEM. The analysis results indicated that the optimum impregnating condition was pressure: 0.5MPa, and time: 20min; and the monomer loading linearly correlated with pressure described as Y=201X+8.9, and linearly correlated with time described as Y=3.4X+31.4, respectively. The optimum polymerization craft was temperature: 80°C, time: 8h and AIBN: 3%. SEM observation showed that polystyrene generated in situ wood cellular structure and filled up wood pores under the optimum impregnating and polymerizing crafts, which was in accordance with the optimum manufacturing craft.
2737
Showing 1 to 3 of 3 Paper Titles