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纤维素废料与造纸黑液木质素制人造木材之探讨 总被引:1,自引:0,他引:1
介绍了现有人造木材的种类,阐述了用竹刨花、竹(木)屑等竹(木)加工剩余物或农作物秸秆与造纸黑液中提取的木质素开发人造木材的重大意义,简要介绍了该人造木材的制造原理和方法以及产品的用途,并分析了人造木材的市场前景及其产业化的可行性. 相似文献
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我国微米木纤维模压制品工业化前景与效益预测 总被引:2,自引:0,他引:2
微米木纤维模压制品是由微米木纤维木材细胞纵向劈裂而模压成型的新型高强度人造木基材料制品,具有我国自主知识产权,应用前景广阔.本文介绍了我国微米木纤维模压制品的发展现状,分析了其工业化前景并进行了效益预测,为我国木材工业提供了新的发展方向. 相似文献
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浅谈人造薄木生产中单板的漂白 总被引:2,自引:0,他引:2
详细阐述了木材颜色的成因及漂白机理,重点介绍了人造薄木生产过程中单板漂白工艺。研究表明,经漂白处理的单板,颜色明显变浅,色调也比较均匀,而且还消除了板面污染,对单板的染色十分有利。 相似文献
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可供选择的几种木废料能源木材干燥法杨文斌(福建林学院南平353001)陈挚坚(厦门市林业局)木材加工过程中产生的木废料,从理论上讲,用来生产热能是不合理的,因为木材可以制造价格更高和更有用的产品。但从现实的工业生产情况看,由于木废料的集中和运输较困难... 相似文献
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木材过坝工程须根除漂木对水电站的危害南京林业大学祁济棠木材过坝工程内涵木材过坝方式、工艺与设备。它须与木材水运方式及其工艺相协调,否则将会产生漂木(包括半沉木和沉木)危害水电站。为此,在木材过坝工程设计时,欲要防止漂木危害水电站的事故,必须首先考虑木... 相似文献
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中国木(竹)雕大透视——聚焦中国木雕艺术 总被引:1,自引:0,他引:1
11月1日.在浙江省义乌举行的2CC9中国义乌国际森林产品博览会上.全国林业系统举办的第一次大型木(竹)雕类展览“中国木(竹)雕展暨优秀作品及金雕手评选活动”成为最大亮点.作品汇集了木雕、竹雕、炭雕、根艺及竹编制品,浙江的东阳木雕、黄岩木雕。以及福建莆田木雕等中国知名木雕纷纷亮相。评出中国木(竹)雕展暨优秀作品金奖(金雕手奖)20名、银奖25名、铜奖30名。 相似文献
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本文阐述了人工林速生材木材增强处理的机理、方法和国内外研究进展,分析了木材增强处理技术在产业化应用中存在的问题和未来发展趋势。 相似文献
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四川省木材及人造板加工的发展和特点 总被引:1,自引:0,他引:1
中密度纤维板产品、强化复合地板产品、竹材制品、非木质造板产品为四川省木材及人造板加工的主导产品。文章对几个在省内具有一定代表性和特点的企业作了简略的介绍,力求勾划出四川省木材及人造板产品生产和发展的大致轮郭。 相似文献
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基于人工智能的木材缺陷检测研究进展 总被引:1,自引:1,他引:0
木材缺陷检测是木制品加工前的重要步骤,为了提高检测效率和经济效益,木材缺陷检测也从传统的人工方法向智能化方向转变。随着计算机技术的不断提高,人工智能得到快速发展,人工智能在木材缺陷检测中的应用也进一步增加。目前,人工智能主要通过机器学习、人工神经网络、深度学习等算法实现对木材缺陷的预处理和检测。文中阐述部分常用人工智能算法在木材缺陷检测中的应用,包括相关算法的原理、特点;综合分析算法优缺点,并对人工智能技术在木材缺陷检测中的研究进行了展望。 相似文献
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20世纪以来,我国从俄罗斯进口大量的木材,以弥补国内木材原材料供应的严重不足。这些木材大多从我国东北地区边境口岸城市进入,经过锯材加工和人工干燥后再运往内地进行深加工。因此,这些口岸城市先后安装和建造了一定数量的木材干燥设备,使木材干燥生产具有了一定的规模。本文对我国东北地区主要边境口岸城市的木材干燥生产情况进行简述,并对生产中出现的一些问题进行探讨。其讨论的问题可供当地及其他地区的木材干燥生产参考,对提高木材干燥生产质量具有一定的实际意义。 相似文献
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Yoshiyuki Yanase Yoshihisa Fujii Shogo Okumura Yuji Imamura Tsuyoshi Yoshimura 《Journal of Wood Science》2000,46(3):243-247
To examine the feasibility of using plate-type waveguides for effective detection of acoustic emissions (AEs) from termite attacks in wood, AEs generated by breaking pencil leads or by termite attacks were detected using an AE sensor with a resonant frequency of 140kHz with steel plates of four different sizes and thickness and three AE sensors without them. The larger plates were associated with larger amplitudes of the artificial AEs. The amplitudes of AEs detected by an AE sensor with a steel plate larger than 30×30mm were greater than the average amplitude of the artificial AEs detected by three AE sensors. When detecting AEs generated by the feeding activity of workers,Coptotermes formosanus Shiraki, the cumulative AE events detected by the sensor with a steel plate were much larger than those of the three AE sensors without a plate. Because AE waves are attenuated much less in a steel plate than in wood, it is more effective to attach the AE sensor to wood with a steel plate rather than directly to the wood. These findings suggest that it is feasible to use an AE sensor with a plate-type waveguide for the nondestructive detection of termite attacks in wood. 相似文献
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通过对官山林场5种立地类型人工刺槐林生长情况的调查和标准木树干解析,建立了树高、胸径、材积与树龄之间的回归方程,分析了立地类型对树高、胸径、材积生长的影响,初步研究探讨了刺槐人工林保护管理措施。 相似文献
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Manabendra Deka Miha Humar Gregor Rep Borut Kričej Marjeta Šentjurc Marko Petrič 《Wood Science and Technology》2008,42(1):5-20
A series of experiments were carried out to investigate the colour stability of chemically treated and thermally modified
wood compared to non-modified wood during long term artificial UV light irradiation. One set of wood samples was vacuum-pressure
impregnated with alkaline (pH 9.8) copper (II) ethanolamine aqueous solution, while another set of samples from the same wood
block was thermally modified at 210°C and −0.90 bar for 2 h. The treated and modified wood samples along with the non-modified
ones were exposed to artificial UV light with the wave length in the region of UVA (315–400 nm) and UVB (280–315 nm) intermittently
for 500 h. Colour measurements were carried out throughout the irradiation period at an interval of 100 h according to CIEL*a*b*
system, where the results are presented in terms of ΔE, ΔL*, Δa* and Δb* values. Better photo-stability in terms of colour changes was recorded for both treated and modified woods compared to the
non-modified one. By means of EPR and DRIFT spectroscopic study it was shown that some degree of colour stability of treated
and modified woods, achieved during artificial UV light irradiation, resulted from lignin modifications and monomers of phenolic
compounds. 相似文献
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竹材通过加工制成的竹质人造板,不仅大量用作代木材料,而且有的竹质板力学强度很大,非木材所能比拟,是良好的工程结构材料。发展竹质板生产是克服木材短缺的切实有效途径。目前浙江竹质人造板主要种类有:竹材胶合板、竹编胶合板、竹篾胶合板、竹丝胶合板和竹材旋切片(板)五种。文章介绍了上述五种板的工艺流程、板的物理力学性质、主要用途,生产中存在的问题以及可供借鉴的国内外先进技术。 相似文献
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Xianai Huang Duygu Kocaefe Yasar Kocaefe Yaman Boluk Andre Pichette 《Wood Science and Technology》2012,46(6):1215-1237
Effect of artificial weathering on the wettability of three heat-treated North American wood species (jack pine, aspen, and birch) is studied from the point of view of the structural and chemical changes taking place on the wood surface. Weathering increases wettability of all three heat-treated woods by water. Changes in wettability during artificial weathering differ according to heat treatment procedure and wood species and are likely due to combination of structural and chemical changes of the surfaces. Scanning electron microscopic analysis indicates that cracks form due to degradation taking place during weathering. As a result, water has easier entry into the cell wall, which consequently increases wettability. IR spectra suggest that the OH/CH2 ratio for heat-treated specimens is inversely proportional to the contact angle regardless of the type of wood species. The presence of cellulose-rich layer on wood surface and increasing amount of amorphous cellulose transformed from crystallized cellulose due to weathering result in increase in hydroxyl; consequently, it increases heat-treated wood wettability. 相似文献