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Sound Insulation Performance of Structural wood Wall Integrated with wood plastic composite

Journal of Bioresources and Bioproducts 2019年第2期4卷 111-118页

作者： Xiaojun YANG Xiaolan TANG Lan MA Youfu SUN College of Materials and Engineering Nanjing Forestry UniversityNanjing 210037China College of Landscape Architecture Nanjing Forestry UniversityNanjing 210037China

The sound insulation performance is an important technical index for evaluating the physical property of the building *** kinds of structural wood walls integrated with wood plastic composite(WPC)were *** the sound insulation performance of the walls was *** results showed that for the wall that constructed by the WPC as the wall studs,compared with the one that constructed by the pine wood as the wall studs,the deviation of their sound insulation was lower than±3 *** wall’s external panel material had significant effect on the wall’s sound insulation property,and the contribution of the wood-plastic panel to the sound insulation was much higher than that of the polyvinyl chloride(PVC)plastic hanging *** surrounding sealing quality of the wall’s external panel material had an important influence on the sound insulation effect of the building wall,and the panel of the wood plastic interior wall had less influence on the sound insulation performance of the *** the sound-absorbing cotton or non-woven fabric as elastic strips was an effective technical measure to improve the sound insulation performance of the *** sound insulation was improved by 2.4 dB and 3.1dB respectively after the correction of pink noise spectrum,and increased by 2.8 dB and 3.6 dB respectively after the correction of traffic noise spectrum.

关键词： wood plastic composite wood plastic composite(WPC)building wall sound insulation performance

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Improvement of Mechanical Properties of wood-plastic composite Floors Based on the Optimum Structural Design

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Acta Mechanica Solida Sinica 2016年第4期29卷 444-454页

作者： Yang Zhang Ping Xue Yun Ding Mingyin Jia Jianchen Cai Xiaoming Jin College of Mechanical and Electrical Engineering Beijing University of Chemical Technology College of Mechanical Engineering Quzhou University

A study is carried out on the structural design of wood-plastic composite floors. The geometric parameters of the cavities, the structure, and the means to optimize the performance of these light boards are investigated. Various structural parameters of the boards, such as size, shape, and the pattern of cavities are also studied. The optimal structure can be determined by calculation and analysis of the strength, stiffness, weight and cost of the material. A finite element model for the mechanical analysis of wood-plastic composite floors is established; and the results are used to verify the strength criteria under bending deformation, which is the most common loading condition of flooring board.

关键词： wood plastic composite cavities flooring board optimal structure the finite element model

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The Accelerated Thermo-Oxidative Aging Characteristics of wood Fiber/Polycaprolactone composite:Effect of Temperature,Humidity and Time

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Journal of Renewable Materials 2021年第12期9卷 2209-2222页

作者： Shuang Si Qian Tang Xingong Li Central South University of Forestry and Technology Changsha410004China

This study investigated the characteristics of wood fiber/polycaprolactone composite after an artificial accelerated thermo-oxidative aging *** effect of time,temperature and humidity during the treatment on their mechanical,chemical and morphology properties were *** composite was prepared from melted wood fibers and modified polycaprolactone by a molding process.A temperature and humidity controllable test chamber was used for the thermo-oxidative aging of the *** thermo-oxidative aging caused surface of the composite to be much more rougher and even a few cracks and holes appeared on *** to the spectra of Fourier Transform Infrared(FTIR)and Gel Permeation Chromatography(GPC),C=O in the molecular chain of polycaprolactone was hydrolyzed and C–O was broken after the aging treatment,which resulted in a reduction in average molecular weight of the ***,results showed that the mechanical strength decreased a lot with the increase in time,temperature and humidity,and the effect of temperature and humidity was more significant compared with that of *** the temperature and humidity during thermo-oxidative aging treatment could accelerate the aging of composite,which provided a quick and effective method for evaluating the aging resistance of the composite.

关键词： wood fiber polycaprolactone wood plastic composite thermo-oxidative aging

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Impacts of freezing and thermal treatments on dimensional and mechanical properties of wood flour-HDPE composite

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Journal of Forestry Research 2013年第1期24卷 143-147页

作者： YANG Wei-jun XIE Yan-jun WANG Hai-gang LIU Bao-yu WANG Qing-wen Key Laboratory of Bio-Based Material Science and Technology (Ministry of Education) Northeast Forestry University

wood plastic composite （WPC） of wood flour （WF）, high density polyethylene （HDPE）, maleic anhydride-grafted polyethylene （MAPE） and lubricant was prepared by extrusion, and then exposed to different temperatures to evaluate the effects of freezing and thermal treatment on its dimensional and mechanical properties. At elevated temperatures, WPC expanded rapidly initially, and then contracted slowly until reaching an equilibrium state. Treatment at 52°C and relative humidity of 50% for 16 days improved the mechanical properties of WPC： flexure, tensile strength, and izod unnotched impact strength increased by 8%, 10% and 15%, respectively. Wide-angle X-ray diffraction （XRD） tests showed that the degree of crystalization of HDPE in WPC declined with increasing treatment temperature.

关键词： wood plastic composite freezing treatment thermal treatment dimension mechanical properties X-ray diffraction

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Production of mahogany sawdust reinforced LDPE wood–plastic composites using statistical response surface methodology

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Journal of Forestry Research 2015年第2期26卷 487-494页

作者： Sofina-E-Arab Md.Azharul Islam Forestry and wood Technology Discipline Khulna University

We produced wood–plastic composite board by using sawmill wastage of mahogany（Swietenia macrophylla） wood and low density *** used multi-response optimization to optimize the process parameters of composite board production including mixing ratio,fire retardant（%） and pressing time（min）.We investigated the effects of these three process parameters in the mechanical and physical properties of the composite ***,Box–Behnken design was performed as response surface methodology with desirability functions to attain the optimal level of mixing ratio,fire retardant and pressing time（min）.The maximum modulus of elasticity（MOE） and modulus of rupture（MOR） were achieved at the optimal conditions of wood plastic mixing ratio of60：40,pressing time of 9 min and zero fire retardant *** optimized MOR and MOE were 13.12 and1,781.0 N mm-2,respectively.

关键词： wood plastic composite LDPE Mechanical properties Physical properties Response surface methodology

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Dynamical mechanical properties of wood-high density polyethylene composites filled with recycled rubber

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Journal of Bioresources and Bioproducts 2021年第2期6卷 152-159页

作者： Feiyu Tian Ling Chen Xinwu Xu College of Materials Science and Engineering Nanjing Forestry UniversityNanjing 210037China

Application of out-of-service rubber from a variety of sources is of both environment-protecting and resource-saving *** that end,recycled tire rubber was utilized as a filler to fabricate wood-high density polyethylene(HDPE)composite with enhanced toughening performance using the injection procedure in this *** of rubber powders were 0,5,10,and 15wt%based on the overall weight of poplar wood flour and HDPE(HDPE:wood flour=70꞉30).The injection-fabricated composites were subjected to a four-cycle repetitive compressing loadings(0-3 kN)and dynamical mechanical analysis(DMA,room temperature to 150℃,in the dual cantilever mode).It was found that the rubber-filled materials exhibit advantageous energy absorption performance compared to wood-HDPE composites under repetitive *** rubber-filled wood-HDPE composites are thermomechanically labile in an environment with raised *** HDPE matrix substance occupies the predominant role in thermally yielding of the overall composite,typically in the temperature range of 50-75℃ resulting in a loss modulus *** to 130-150℃,all the composites fully loses their moduli with loss factor(Tan δ)reaching its peak values of *** conclude,rubber-filled wood-HDPE is a qualified material applicable in proper temperature range.

关键词： Recycled rubber wood plastic composite Dynamical mechanical analysis Toughening

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