木质纤维素功能材料的研究进展

木材独特的多层级结构、优异的各向异性结构、良好的力学性能和微纳米通道,赋予其一系列非凡的性能,为功能材料的设计提供了更多可能.为提高木质纤维素资源的利用率和高值化转化,基于木质纤维素自身结构和理化性能,概述了木质纤维素在系列功能材料领域的发展,总结了结构设计及调控对木质纤维素功能材料性能的影响,综述了其在结构调控材料、...     

木质材料切削加工技术

木质材料是一类包括木材和以木材（或其废料）为主要原料,经过机械加工、物理化学处理而得到的具有木材基本特性和主要组分的材料。木材、改性木材、木质人造材料和木质复合材料都属于木质材料。用于加工木质材料的刀具统称为木工刀具,其特点是要求在高速并且承受冲击载荷的切削条件下,长时间保持刀具切削刃的锋利,不仅要具有较好的硬度和耐磨性,还要有足够的强度和韧性。由于木质材料性质的特殊性,切削必须要考虑树种、密度、含水率、木材纹理、纤维方向等因素,这也使得木工刀具的材料选择和结构设计都有较强的针对性。     

木质材料防腐朽菌败坏研究综述

就木材防腐相关知识做了简要的介绍,对木材防腐机理、常用木材防腐剂,以及新型木材防腐方法分别做了阐述,并对木材防腐发展方向做了试探性的预测.     

木质电磁屏蔽材料

电磁辐射的屏蔽,就是利用屏蔽材料阻隔或衰减被屏蔽区域与外界的电磁能量传播,因此,性能良好的电磁屏蔽材料应具有较高的电导率及磁导率,比如铜、铝、银等金属都是常用的屏蔽材料。     

木质材料砂光机发展现状及趋势

介绍了砂光机的特点和分类,阐述了国内外砂光机的发展历程与现状,并分析了砂光机的发展趋势.     

木质材料砂带磨削的若干问题

较为详细地介绍了砂带磨削的基本原理及其工艺特点,并分析了木质材料砂带磨削中的几个技术问题,指出了木质材料砂带磨削的发展方向。     

PTFE针刺非织造过滤材料蠕变模型的建立与验证

聚四氟乙烯(PTFE)纤维非常适合制作成耐高温过滤材料,在袋式除尘器中应用广泛。由于PTFE抗蠕变性能差,为保证PTFE针刺非织造过滤材料长期工作的稳定性,对其蠕变性能进行了研究,并对常温试验数据进行了处理分析,建立了适合该过滤材料的六元件并联模型,并用origin软件验证了其可行性。     

木质材料表面超疏水研究

为改善木质材料的吸湿性,提高木质产品质量,扩大木质产品使用范围,木质材料的疏水性研究一直深受关注。在总结国内外木质材料表面疏水性研究的基础上,分析相关方法中存在的问题,提出展望,为木质材料表面超疏水研究提供参考。     

木质材料表面超疏水研究

为改善木质材料的吸湿性,提高木质产品质量,扩大木质产品使用范围,木质材料的疏水性研究一直深受关注。在总结国内外木质材料表面疏水性研究的基础上,分析相关方法中存在的问题,提出展望,为木质材料表面超疏水研究提供参考。     

木结构螺栓连接研究进展

从不同国家规范关于木结构螺栓连接的规定、有限元的应用、破坏模式研究及影响因子等方面,阐述了国内外对木结构螺栓连接侧向承载性能的研究.     

A review of wood cutting tool wear literature

The current state of knowledge about wood cutting tool wear is assessed by reviewing the published work in this area. Research concerned with tool wear which deals primarily with the tool material, with the work material and with tool-work interactions is considered.     

Retention of glycerol sessile drop on MDF wood material

The aim of our work is to determine the retentive force which retains a droplet on a tilted board of MDF. The application of this study is concerned with the deposit of painting on wood material. From the relations of the literature we calculated and measured the critical volume of a glycerol drop deposited on MDF. Beyond this critical volume the droplet slides on the tilted plane. The comparison of our experimental values to those given by the relations of the literature offers good results. It is thus possible to say that half of the width of the droplet, during sliding, can be comparable to the radius of the horizontal droplet contact line. In the same way we confirm the fact that the receding contact angle on this type of material is equal to zero.     

Heat-treated wood as chromium adsorption material

Heavy metals adsorption with lignocellulosic materials has been heavily researched in the last years. Since heat activation has been used with good results to increase the adsorption capacity of some materials, heat-treated wood might be a better adsorbent. This hypothesis is the basis of the present study. The adsorption tests were made with powdered pine wood, heat-treated at 190–210?°C. All the heat-treated samples showed a significantly higher adsorption compared to untreated wood. The maximum adsorption was obtained at pH 3 for heat-treated wood at 210?°C. The kinetics of the adsorption process fitted a pseudo-second-order reaction (R² 0.990–0.996). Adsorption fitted well both the Langmuir and the Freundlich model, but the Freundlich model presented higher R² (0.988–0.998). The q_max values estimated by the Langmuir plotting were in the range 15.6–19.4 mg/g and the n values from Freundlich isotherms between 1.87 and 2.39. Heat-treated wood was a better adsorption material than untreated wood for chromium adsorption. This can be a good application for the sawdust produced by the processing of heat-treated wood at primary and secondary wood processing mills or for the recycling of heat-treated wood at the end of product life.     

木材工业用酚醛树脂的改性研究现状

从降低成本、提高性能的角度阐述了近几年来木材工业用酚醛树脂胶粘剂改性研究及应用的现状。     

中纤板生产如何节约木质原材料

木质原材料是生产中纤板的主要原料,它一般是指小径木,间伐材,枝桠材,木材加工剩余物等.生产一立方米的中纤板大约需要1.45～1.85 t(自然)木质原材料.在中纤板生产中节约木质原材料不仅可以减少树木的砍伐,有利于生态环境保护,还可以降低企业的生产成本,减缓木质原材料的供应压力,有利于企业的生存和发展.节约木质原材料应从以下几个方面着手: