无机胶合人造板的发展历史及最新技术进展

本文介绍了以水泥、石膏和炉渣等无机材料为胶粘剂的人造板的发展历史，论述了无机胶合人造板制造的最新技术，展望了无机胶合人造板的发展前景。     

竹材在人造板工业中的开发利用及展望

竹材人造板研究的深度、应用的广度及其发展的速度已成为衡量一个国家木材工业技术水平先进程度的重要标志之一。本文主要介绍了目前我国竹材以及竹材人造板的开发利用情况,展望了竹材人造板的发展前景。     

中国竹质人造板复合板研究与生产概况

本文概述了中国竹类资源分布状况；简要介绍了研制成功并投入生产的竹编胶合板、竹材胶合板、竹帘胶合板、复塑竹帘胶合板、竹碎料板、竹旋切薄片、竹木复合板等竹质人造板和研制成功而未投入生产的竹纤维板、竹水泥碎料板、竹石膏碎料板等竹质人造板；列举了近年来竹质人造板研究内容；还评估了竹质人造板生产的经济效益和社会效益。     

人造板在建筑上的应用

建筑业是人造板产品的最大潜在市场,但是,我国人造板在此行业的局面尚未打开。本文从人造板特点出发,较详细地介绍了国内外各种人造板在建筑上的应用途径,并提出了几点建议,以供参考。     

二十一世纪人造板发展的新趋势

进入二十一世纪以来我国的人造板工业的发展已进入了高速发展的阶段，无论是产量、质量、使用的技术设备均进入了世界顶级水平的前列。在众多的新技术、新设备、新工艺不断得到应用与发展的同时，人们在思考未来的人造板发展的趋势是什么？我们认为在下列几个方面是今后人造板工业发展应给予考虑的方向。     

无机胶合人造板发展机遇和对策

本文论述了我国无机胶合人造板的发展现状。国内墙体材料的改革将为无机胶合人造板的发展带来良好的机遇，论述了无机胶合人造板发展的有利因素和对策，提出了需改进的措施。     

中国竹质人造板 复合板研究与生产概况

本文概述了中国竹类资源分布状况；简要介绍了研制成功并投入生产的竹编（席）胶合板、竹材胶合板、竹帘胶合板、复塑竹帘胶合板、竹碎料板、竹旋切薄片、竹木复合板等竹质人造板和研制成功而未投人生产的竹纤维板、竹水泥碎料板、竹石膏碎料板等竹质人造板；列举了近年来竹质人造板研究内容；还评估了竹质人造板生产的经济效益和社会效益。     

云南人造板工业可持续发展的有效途径

本文针对云南省的社会，经济和环境生态的现实情况，提出了人造板工业可持续发展的有效途径，发展可以取代部分实木制品的人造板的数量和品种；利用竹材的速生材和蔗渣，烟秆，棉花秆等一年生农业剩余物生产代木性人造板材，强化生产过程中的工艺和质量控制；增加人造板花色品种包括开发生产无机胶合型人造板；提倡回收利用废旧塑料等工农业废弃物作为生产人造板的原料，它也是发展中地区人造板工业可持续发展的有效途径。     

2012年《中国人造板》杂志征订启事

《中国人造板》(月刊)是我国唯一专题报道人造板全方位信息的杂志。主要面向人造板、人造板原辅材料、人造板深加工,地板、木材加工设备及配件,室内装饰、木制家具、建材等领域的广大企事业单位、营销单位、行政管理部门,发行量较大,报道专业性强,是行业的质量、技术、市场信息专家。     

云南人造板工业可持续发展的有效途径

本文针对云南省的社会、经济和环境生态的现实情况，提出了人造板工业可持续发展的有效途径：发展可以取代部分实木制品的人造板的数量和品种；利用竹材之类的速生材和蔗渣、烟秆、棉花秆等一年生农业剩余物生产代木性人造板材；强化生产过程中的工艺和质量控制；增加人造板花色品种包括开发生产无机胶合型人造板；提倡回收利用废旧塑料等工农业废弃物作为生产人造板的原料。它也是发展中地区人造板工业可持续发展的有效途径     

Current Research and Development on Deformation and Fixation of Bended Wood and Wood-based Composites

There are many advantages of bended wood,such as good-looking shape,simple process and low cost.The product,however,is easy to get recovery,which is urgent to be dealt with.This paper concludes the features of deformation and recovery of bended wood and wood-based composites and summarizes four treating methods to keep dimensional stability.Compared to bended solid wood,some elementary perspectives on the research of bended wood-based composites are presented.The purpose of this paper is to suggest:1)to investigate the optimum heating time and temperature that bended wood and wood-based composites need from the formation of deformation to the recovery and to the permanent fixation,according to its changes of dimensional stability such as curvature radius;2)to measure the composites comprised of wood and adhesives on the changes of stress relaxation,dynamic viscoelasticity and crystal1ization field;3)to quantitatively analyze changes of the major components in wood cell wall polymers as well as the composites under heat/steam treatment and untreated conditions.It will be helpful for subsequent research to clarify on the mechanisms of permanent fixation of bended wood and also contribute to that of wood-based composites.     

Dynamic Mechanical Properties of Wood Powder /Polypropylene Composites

The dynamic mechanical properties of wood powder/polypropylene composites with different wood content treated and untreated with the compatibilizer have been studied. It has been found that addition of wood powders and the compatibilizer can both improve the viscoelasticity of composites. Glass transition temperature (Tg) of appropriate wood powder-filled composites decreased. The value for the storage modulus (G') increased gradually with increasing wood powder content. The addition of the compatibilizer made glass transition temperature shift to a higher temperature. DSC (Differential Scanning Calorimetry) results showed that, for pure PP, the addition of the compatibilizer decreased its melting point, and increased its Calorie of Melt at the same time. For the composite with 50 % wood powder treated with the compatibilizer, the melting point was almost unchanged, but its Calorie of Melt decreased.     

Cellulose esters as compatibilizers in wood/poly(lactic acid) composite

One of the important issues relevant to wood/plastic composite molding is the compatibility between hydrophilic wood and hydrophobic plastic. Polyolefins modified with maleic anhydride, which have been frequently used for wood and polyolefin composites, are not effective for poly(lactic acid) composites. Because compounds with both hydrophilic and hydrophobic groups are potential compatibilizers, cellulose esters of several carboxylic acids, RCOO-cellulose (R = CH₃, C₂H₅, C₃H₇, C₄H₉, C₅H₁₁, C₁₁H₂₃), were synthesized and their effects as compatibilizers of wood/poly(lactic acid) composites (WPLC) were examined in this study. The mechanical properties of WPLC were improved with a small amount of added cellulose esters, especially cellulose butyrate or cellulose valerate. The relevant effect of added cellulose esters on the thermal properties of wood/PLA composite was analyzed by measuring dynamic viscoelasticity. Part of this report was presented at the 56th Annual Meeting of Japan Wood Research Society, Akita, August 2006 and the 9th International Conference on Frontiers of Polymers and Advanced Materials, Cracow, Poland, July, 2007     

美国木材与纤维复合材料研究现状

对美国木材工业及纤维复合材料方面的研究及发展现状进行了论述, 重点介绍木材工业、木结构材料、木基复合材料、纤维复合材料、木材化学利用和木材生物质能源等领域的研究现状和发展动态, 并针对我国木材利用现状提出开展木材资源系统基础及应用研究、加快环境友好型天然纤维复合材料研发和加强木材化学及能源利用研究的建议。     

Design Wood Nanocomposites from Polymer Nanocomposites

1INTRODUCTIONAsbiologicmaterialformedbycells,Woodhasparticularstructureandprominentproperties.Woodisgreenenvironmentalmaterial.Inthisaspect,otherengineeringmaterialscannotcomparewithwood.Woodhasmanyspecialvirtues,buthasalsomanyinherentdefectsthatcantbeovercomebyconventionalprocessingmethods.Woodcompositesaremoreadvantageousthancommonwoodandotherconventionalmaterialsincomposition,structure,propertiesandsoon.WiththegreatachievementsinWoodcompositematerials,manynewhigh-levelwoodcompositesha…     

Micromorphology,moisture sorption and mechanical properties of a biocomposite based on acetylated wood particles and cellulose ester

Abstract

One of the major issues in a long-term perspective for the use of wood–plastic composites (WPCs) in outdoor applications is the moisture sensitivity of the wood component and the consequent dimensional instability and susceptibility to biological degradation of the composite. In this work, the effects of using an acetylated wood component and a cellulose ester as matrix on the micromorphology, mechanical performance and moisture uptake of injection-moulded WPCs have been studied. Composites based on unmodified and acetylated wood particles, specially designed with a length-to-width ratio of about 5–7, combined with both cellulose acetate propionate (CAP) and polypropylene (PP) matrices were studied. The size and shape of the wood particles were studied before and after the processing using light microscopy, and the micromorphology of the composites was studied using a newly developed surface preparation technique based on ultraviolet laser irradiation combined with low-vacuum scanning electron microscopy (LV-SEM). The water vapour sorption in the composites and the effect of accelerated weathering were measured using thin samples which were allowed to reach equilibrium moisture content (EMC). The length-to-diameter ratio was only slightly decreased for the acetylated particles after compounding and injection moulding, although both the unmodified and the acetylated particles were smaller in size after the processing steps. The tensile strength was about 40% higher for the composite based on acetylated wood than for the composite with unmodified wood using either CAP or PP as matrix, whereas the notched impact strength of the composite based on acetylated wood was about 20% lower than those of the corresponding unmodified composites. The sorption experiments showed that the EMC was 50% lower in the composites with an acetylated wood component than in the composites with an unmodified wood component. The choice of matrix material strongly affected the moisture absorptivity of the WPC. The composites with CAP as matrix gained moisture more rapidly than the composites with PP as matrix. It was also found that accelerated ageing in a Weather-Ometer® significantly increased the moisture sensitivity of the PP-based composites.     

改性剂对木塑复合材料力学性能影响的研究

采用木材纤维,分别与PE、PS、ABS、SAN等热塑性高分子聚合物,经热压复合工艺制成木塑复合板材,通过加入不同的改性剂以及改变改性剂的加入量,研究它们对木塑复合材料力学性能的影响。结果表明:改性剂的加入能使木材纤维与各种热塑性高分子聚合物很好地胶接;改性剂不同对木塑复合材料的性能产生不同的影响;改性剂的加入量为木材纤维用量的5%时,该法制作的木塑复合板材力学性能最佳。     

木质复合材料──木材工业的发展方向

本文介绍了木材与塑料、合成纤维及其他非木质材料复合所形成的复合材料及其基本性质、加工工艺和应用前景。木质复合材料是一种很有发展前途的新型材料，此种材料的加工技术扩展了木材的应用领域，亦为木材工业提供了新的发展方向。     

A review of wood thermal pretreatments to improve wood composite properties

The objective of this paper is to review the published literature on improving properties of wood composites through thermal pretreatment of wood. Thermal pretreatment has been conducted in moist environments using hot water or steam at temperatures up to 180 and 230 °C, respectively, or in dry environments using inert gases at temperatures up to 240 °C. In these conditions, hemicelluloses are removed, crystallinity index of cellulose is increased, and cellulose degree of polymerization is reduced, while lignin is not considerably affected. Thermally modified wood has been used to manufacture wood–plastic composites, particleboard, oriented strand board, binderless panels, fiberboard, waferboard, and flakeboard. Thermal pretreatment considerably reduced water absorption and thickness swelling of wood composites, which has been attributed mainly to the removal of hemicelluloses. Mechanical properties have been increased or sometimes reduced, depending on the product and the conditions of the pretreatment. Thermal pretreatment has also shown to improve the resistance of composites to decay.     

我国沙生灌木基木质复合材料研究进展

沙生灌木是我国西部干旱、半干旱地区丰富的生物质资源。文中在介绍沙生灌木木材学特性的基础上,归纳总结了近年来我国沙生灌木资源在新型人造板——重组木、木塑复合材、轻质工程材料、纳米复合材料等木质复合材料领域的研究现状,展望了沙生灌木资源在木质复合材料领域的发展趋势,旨在进一步推动沙生灌木资源在木质复合材料领域的应用与发展。