Polymerization Craft of Wood-PSt Composite and its Performance

2010 ◽  
Vol 139-141 ◽  
pp. 1419-1423
Author(s):  
Yun Lin Fu ◽  
Yong Feng Li ◽  
Yi Xing Liu ◽  
Bao Gang Wang
Keyword(s):  
Mechanical Properties ◽  
Porous Structure ◽  
Compression Strength ◽  
Modulus Of Elasticity ◽  
Cellular Structure ◽  
In Situ Polymerization ◽  
Wood Polymer ◽  
Composite Wood ◽  
Wood Polymer Composite

A novel Wood-Polymer Composite, Wood-PSt composite combining both advantages of wood and polystyrene was fabricated by determining the polymerization craft of monomer in wood porous structure through impregnating monomer into wood pores and followed by in-situ polymerization through a thermal-catalyst treatment. The performance was examined, and its structure was also characterized by SEM and FTIR. The results indicate that the optimum polymerizing craft is: 80oC, 8h and 3% AIBN. Under the optimum craft, the mechanical properties involving modulus of elasticity and compression strength were linearly increased with content of polystyrene. SEM and FTIR show that styrene polymerized under the employed polymerization craft, and the resultant polystyrene relatively full generated in wood cellular structure, in accordance with the results of the optimum polymerizing craft. Such composite having good mechanical properties and biomass features can be widely used in fields of construction, traffic and furniture.

Performance of Wood-Polymer Composite Prepared by In Situ Synthesis of Terpolymer within Wood

2010 ◽  
Vol 34-35 ◽  
pp. 1165-1169 ◽  
Author(s):  
Yong Feng Li ◽  
Bao Gang Wang ◽  
Qi Liang Fu ◽  
Yi Xing Liu ◽  
Xiao Ying Dong
Keyword(s):  
Mechanical Properties ◽  
Porous Structure ◽  
Polymer Composite ◽  
Value Added ◽  
Untreated Wood ◽  
Modulus Of Rupture ◽  
Hydroxyl Group ◽  
Wood Polymer ◽  
Wood Polymer Composite

In order to improve the value-added applications of low-quality wood, a novel composite, wood-polymer composite, was fabricated by in-situ terpolymerization of MMA, VAc and St within wood porous structure. The structure of the composite and the reaction of monomers within wood were both analyzed by SEM and FTIR, and the mechanical properties were also evaluated. The SEM observation showed that the polymer mainly filled up wood pores, suggesting good polymerizating crafts. The FTIR results indicated that under the employed crafts, three monomers terpolymerized in wood porous structure, and grafted onto wood matrix through reaction of ester group from monomers and hydroxyl group from wood components, suggesting chemical combination between the two phases. The mechanical properties of the wood-polymer composite involving modulus of rupture, compressive strength, wearability and hardness were improved 69%, 68%, 36% and 210% over those of untreated wood, respectively. Such method seems to be an effective way to converting low-quality wood to high-quality wood.

Wood-Polymer Composite Fabricated by Polymerization of Monomers within Wood Porous Structure

2012 ◽  
Vol 549 ◽  
pp. 699-702
Author(s):  
Xiao Ying Dong ◽  
Ding Wang Gong ◽  
Zhen Bo Liu ◽  
Yi Xing Liu
Keyword(s):  
Porous Structure ◽  
Polymer Composite ◽  
Glycidyl Methacrylate ◽  
Solid Polymer ◽  
Ftir Analysis ◽  
Functional Monomers ◽  
Wood Polymer ◽  
Composite Wood ◽  
Wood Polymer Composite

A novel composite, wood-polymer composite, was fabricated by polymerization of functional monomers within wood porous structure. The wood was a fast-growing plant wood, Micheliamacclurel wood, which was rarely reported in previous studies, and two functional monomers, glycidyl methacrylate and ethylene glycol dimethacrylate, were novelly employed. The monomers, added with a few Azo-bis-isobutryonitrile as initiator, and maleic anhydride as catalyst, were first impregnated into wood pores under vacuum/pressure conditions, and then in-situ polymerized into polymers through a catalyst-thermal treatment. After the processes, wood-polymer composite was resulted. SEM and FTIR analysis for the composite indicated that the monomers polymerized into solid polymer, which fully filled up wood pores, and the resulted polymer grafted onto wood matrix, resulting in good interface combination between polymer and wood matrix. Such composite with satisfactory interface can be potentially applied as structural material in construction field.

Structural Characterization of Wood-Polymer Composite Prepared by In Situ Polymerization of Styrene

2011 ◽  
Vol 675-677 ◽  
pp. 491-494
Author(s):  
Yong Feng Li ◽  
Yi Xing Liu ◽  
Xiu Rong Li ◽  
Jian Li ◽  
Xiang Ming Wang
Keyword(s):  
Porous Structure ◽  
Polymer Composite ◽  
High Performance ◽  
In Situ Polymerization ◽  
Xrd Analysis ◽  
Vinyl Monomer ◽  
Environmental Characteristic ◽  
Wood Polymer ◽  
Wood Polymer Composite

A novel biomass composite, wood-polymer composite with potential good mechanical properties, durability and environmental characteristic capable of applying in fields of construction and traffic as structural material, was prepared by generating high-performance polymer from in situ polymerization of styrene in wood porous structure. The vinyl monomer, styrene, combing with 1wt% AIBN as an initiation, was first impregnated into wood porous structure under a vacuum/pressure condition, and then in situ polymerized through a thermal treatment. The structure of the resultant composite was characterized by SEM, FTIR and XRD. Results show that styrene polymerized into polystyrene through free radical polymerization, and the resultant polymer fully filled in wood porous structure in a column form, partly contacting wood matrix. FTIR analysis indicates that polystyrene generated into wood pores, indicating weak interaction between them. XRD analysis suggests that the polystyrene generated into wood pores mainly existed in an amorphous form.

Study on Manufacturing Craft of Wood-PSt Composite

2010 ◽  
Vol 44-47 ◽  
pp. 2737-2741
Author(s):  
Duo Jun Lv ◽  
Yong Feng Li ◽  
Chi Jiang ◽  
Yue Hong Zhang ◽  
Yi Xing Liu
Keyword(s):  
Thermal Treatment ◽  
Porous Structure ◽  
Cellular Structure ◽  
In Situ Polymerization ◽  
Styrene Monomer ◽  
Sem Observation ◽  
Composite Wood ◽  
Wood Based Composite

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.

Fabrication and Mechanical Properties of Wood-PMMA Composite

2010 ◽  
Vol 160-162 ◽  
pp. 640-643
Author(s):  
Yong Feng Li ◽  
Duo Jun Lv ◽  
Chi Jiang ◽  
Yi Xing Liu ◽  
Hong Yue Zhang
Keyword(s):  
Mechanical Properties ◽  
Methyl Methacrylate ◽  
Cellular Structure ◽  
Untreated Wood ◽  
Thermal Polymerization ◽  
Modulus Of Rupture ◽  
Dsc Analysis ◽  
Wood Polymer ◽  
Composite Wood ◽  
Wood Polymer Composite

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.

Mechanical Properties of Wood-Polymer Composite Prepared by In-Situ Polymerization of Methyl Methacryalte and Styrene

2012 ◽  
Vol 166-169 ◽  
pp. 2938-2941 ◽  
Author(s):  
Yong Feng Li ◽  
Ding Wang Gong ◽  
Xiao Ying Dong ◽  
Zhen Bo Liu
Keyword(s):  
Mechanical Properties ◽  
Polymer Composite ◽  
In Situ Polymerization ◽  
Untreated Wood ◽  
Modulus Of Rupture ◽  
Test Results ◽  
Wood Polymer ◽  
Wood Based Composite ◽  
Wood Polymer Composite

Fast-growing poplar wood, Populus ussuriensis Kom, was used to prepare novel wood-polymer composite by the in-situ polymerization of methyl methacrylate (MMA) and styrene (St). SEM observation and FTIR analysis indicated that the resulted polymer well filled up wood cell lumen and physically reinforce wood matrix. The test results also proved that the mechanical properties of wood including modulus of rupture, modulus of elasticity, compression strength and hardness of were improved by 68.28%, 110.27%, 62.43%, 357% over those of Untreated Wood, respectively. Such wood-based composite could be potentially used as reinforced material in construction fields.

Wood-Polymer Composite Prepared by In Situ Synthesis of Copolymer within Wood and its Dimensional Stability

2010 ◽  
Vol 150-151 ◽  
pp. 1-5
Author(s):  
Yong Feng Li ◽  
Chi Jiang ◽  
Duo Jun Lv ◽  
Xiao Ying Dong ◽  
Yi Xing Liu
Keyword(s):  
Contact Angle ◽  
Porous Structure ◽  
Polymer Composite ◽  
Dimensional Stability ◽  
Value Added ◽  
Hydroxyl Groups ◽  
Wood Polymer ◽  
Volume Swelling ◽  
Wood Polymer Composite

In order to improve the value-added applications of low-quality wood, a novel Wood-Polymer Composite was fabricated by in-situ synthesis of copolymer from monomers within wood porous structure. The structure was characterized with SEM and FTIR, and its dimensional stability was also tested. The SEM observations showed that copolymer filled up wood pores and contact tightly with wood matrix, indicating strong interactions between them. FTIR analysis indicated that when the monomers copolymerized in situ wood porous structure, they also reacted with wood matrix by reaction of hydroxyl groups and ester groups, indicating chemical bond between the two phases, which is agreement with SEM observations. The volume swelling efficiency and contact angle of such composite were higher than those of wood, respectively, indicating good dimensional stability involving volume swelling efficiency and contact angle. Such composite could be potentially applied in fields of construction, traffic and indoor decoration.

Preparation and Property of Wood Polymer Composite with a Two-Step Method

2009 ◽  
Vol 79-82 ◽  
pp. 1527-1530
Author(s):  
Yong Feng Li ◽  
Yi Xing Liu ◽  
Hai Peng Yu ◽  
Wen Shuai Chen
Keyword(s):  
Mechanical Properties ◽  
Porous Structure ◽  
Polymer Composite ◽  
Cell Walls ◽  
Untreated Wood ◽  
Hydroxyl Group ◽  
Step Method ◽  
Wood Polymer ◽  
Wood Polymer Composite ◽  
Modified Wood

Wood as a porous structure has weak durability and unsatisfactory mechanical properties which limits its utilization. For this reason, the study presents a two-step method to prepare a new modified wood material—Wood Polymer Composite. Maleic anhydride(Man) firstly penetrates into the porous structure of wood, followed by a reaction with wood cell walls. Then, Styrene(St) with some Man and a few amount of initiator, AIBN, permeate through the whole wood and react with the above modified wood. The structural characterization of wood polymer composite with SEM and FTIR indicates that Man reacts successfully with the hydroxyl group of wood cell wall by its anhydride group, and further reacts fully with styrene as a free radical copolymerization form by its double bond; and thus the polymer fills in wood cell lumina as a solid form, which combines the wood cell walls without any evident crack. The testing results of properties show that the mechanical properties of wood polymer composite increase by about 50%-250% over those of unmodified wood, and its durability improve 1.9-4.89 times than untreated wood.

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