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.

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.

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.

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.

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.

Durability of Wood-Polymer Composite Prepared by In Situ Polymerization of Functional Monomers

2012 ◽  
Vol 571 ◽  
pp. 69-72
Author(s):  
Ding Wang Gong ◽  
Zhen Bo Liu ◽  
Hua Wei Huang ◽  
Chang Qing Zhang ◽  
Chen Liang
Keyword(s):  
Weight Loss ◽  
Polymer Composite ◽  
Cell Walls ◽  
Decay Resistance ◽  
White Rot ◽  
Functional Monomers ◽  
Cell Lumen ◽  
Wood Polymer ◽  
Wood Polymer Composite

Fast-growing plant wood, Micheliamacclurel wood, was modified by formation of wood-polymer composite to improve its decay resistance. Two functional monomers, glycidyl methacrylate and ethylene glycol dimethacrylate, added with a few Azo-bis-isobutryonitrile as initiator, and maleic anhydride as catalyst, were first impregnated into wood cell lumen under a vacuum-pressure condition, and then in-situ polymerized into copolymers through a catalyst-thermal treatment. The decay resistances of untreated wood and wood-polymer composites were assessed by weight loss and compared by SEM observations. SEM and FTIR analysis indicated that the in-situ polymerized copolymers fully filled up wood cell lumen and also grafted onto wood cell walls, resulting in the blockage of passages for microorganisms and moisture to wood cell walls. Thus, the decay resistance of the wood-polymer composite against brown rot fungus and white rot fungus in terms of weight loss achieved 1.04%~1.33%, improved 95.10%~95.35% than those of untreated Micheliamacclurel wood; and also higher than that of boron-treated wood. The SEM observations presented the remarkable improvement of decay resistance of wood after such treatment, which effectively protected wood from degradation by fungi.

Study of Processing Parameters of Preparation of Wood-Polymer Composite by Synthesis of Terpolymer in Wood Porous Structure

2010 ◽  
Vol 450 ◽  
pp. 181-184 ◽  
Author(s):  
Yong Feng Li ◽  
Yi Xing Liu ◽  
Feng Hu Wang ◽  
Duo Jun Lv ◽  
Chi Jiang
Keyword(s):  
Porous Structure ◽  
Influencing Factors ◽  
Polymer Composite ◽  
Heating Temperature ◽  
Weight Ratio ◽  
Renewable Resource ◽  
Processing Parameters ◽  
Wood Polymer ◽  
Polymer Loading ◽  
Wood Polymer Composite

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.

Wood-Polymer Composite Prepared by Combined Two-Step Method and its Dimensional Stability

2011 ◽  
Vol 194-196 ◽  
pp. 1811-1814
Author(s):  
Yong Feng Li ◽  
Jia Li Gao ◽  
Feng Li ◽  
Ding Wang Gong ◽  
Yi Xing Liu
Keyword(s):  
Polymer Composite ◽  
Dimensional Stability ◽  
Glycidyl Methacrylate ◽  
Wood Cell Wall ◽  
Molar Ratio ◽  
Poplar Wood ◽  
Step Method ◽  
Wood Polymer ◽  
Interfacial Compatibility ◽  
Wood Polymer Composite

Wood-polymer composite was prepared by a novel combined two-step method with maleic anhydride (MAN) for the first treatment, and mixed monomers of glycidyl methacrylate (GMA)/ methyl methacrylate (MMA) (1:5 of molar ratio) for the second treatment. SEM and FTIR technologies were employed to characterize the interfacial compatibility between resultant polymer and wood matrix, and the dimensional stability of the resultant wood-polymer composite was also tested. The results indicated that polymers fully filled up wood cell lumina and chemically bonded to wood cell wall, resulting in the improvement of interfacial compatibility between polymer and wood matrix without obvious lacunae. The dimensional stability of poplar wood was significantly improved after the combined two-step treatment, and became more stable than that of PEG-1000 treated Poplar Wood.

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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