搜索结果: 76-90 共查到“知识库 木材学”相关记录566条 . 查询时间(1.818 秒)
研究了杨木线性振动摩擦焊接的干剪切强度、湿剪切强度和木破率。为提高杨木摩擦焊接的湿剪切强度与木破率,采用表面氧化、表面磺化以及表面涂覆的方式处理杨木板材,再经线性振动摩擦焊接进行黏合,使用万能力学试验机测得其剪切强度,对比表面处理前后剪切强度的变化,并利用傅里叶红外光谱分析了其表面处理前后基材和摩擦焊接层的化学基团变化情况,对胶合性能的变化做出解释。
竹材液体渗透性是影响竹材改性处理效果的重要因素。采用碱液处理(80 ℃,质量分数1%～4%,处理时间1～4 h)竹束,分析工艺参数对竹束质量损失率、染液质量增加率的影响,解析处理前后竹材微观构造、孔隙结构参数的变化情况,揭示碱液处理改善竹材液体渗透性的机理。结果显示,碱液质量分数及处理时间对竹束质量损失率影响显著。
木材真菌染色是由于真菌侵染而导致材色改变,包括菌纹线、白腐和染色。木材真菌染色可形成特殊肌理和色泽,改善木材的装饰特性,为木质产品的设计带来多样化的塑造空间。作为一种全新、天然的染色方式,真菌染色技术对于木材的美学价值和综合利用率都有较大提高。目前,分析木材真菌染色机理及染色工艺改进是开发真菌染色木材的关键。
木材功能化研究新进展
木材 环境友好 功能化 应用领域
2020/7/31
木材不仅仅是一种具有可持续、可再生、可生物降解的环境友好型材料,同时具有多级的层次结构、优良的各向异性、多样的化学性能等优点。随着纳米技术及其他先进技术的发展,通过简单的设计制备方法,直接对木材进行自上而下的组装,得到具有功能性的木质材料,打破了木材在实际应用上的局限性,并有希望替代传统的玻璃、塑料等难降解材料。
木材保护是节约木材资源、提高木材使用质量的重要手段。为了实现长期、高效的木材保护,通常需要对木材进行整体浸渍处理,即通过木材的多孔结构将包含有效成分的木材保护剂分散体系引入木材内部。随着技术的发展,出现了各种不同类型的木材保护剂分散体系,笔者介绍了其分类以及各类型的定义和基本特性,在此基础上分别对溶液、微乳液、乳浊液、溶胶、悬浊液型木材保护剂分散体系在木材中的液体渗透性方面研究进行了概述。
简要地概述了目前杉木复合材料的制备和性能研究进展,综合介绍了杉木复合材料的制备工艺、影响因子和物理、力学性能的特点等,并提出了杉木复合材料的应用前景和发展方向。
Impacts of Central Tire Inflation Systems application on forest transportation – Review
timber transportation road maintenance transportation cost vehicle mobility fuel consumption safety
2017/6/26
Central Tire Inflation Systems (CTIS) have been introduced to forestry transportation in the last 30 years to the point the forest industry is one of the biggest users of the technology (Pletts 2006)....
The use of bioenergy for district heating is usually seasonal with a high consumption during the cold periods. Therefore some type of the harvested material storage is necessary. Woody materials are u...
Effects of geo-ecological conditions on larch wood variations in the North European part of Russia (Arkhangelsk region)
Larix sibirica wood density latewood content ring width
2017/6/26
The present study examines the macrostructure and density of larch wood and possible influences on the productivity of larch stands. The studies were conducted in the middle and sub-tundra taiga in th...
Influence of site conditions and silvicultural practice on the wood density of Scots pine (Pinus sylvestris L.) – a case study from the Doksy locality, Czech Republic
shelterwood regeneration clearcut forest site softwoods physical properties variability
2018/3/6
After spruce, the Scots pine (Pinus sylvestris Linnaeus) is the second most important commercial coniferous tree
species in the Czech Republic. However, we are finding out that awareness of the varia...
Estimating the aboveground carbon sequestration and its economic value (case study: Iranian Caspian forests)
allometric equation economic value of carbon density of wood forest inventory
2018/3/6
The aim of the study is to estimate the aboveground carbon sequestration and to determine the economic
value of forests in carbon sequestration as a way of mitigating climate change. This research wa...
Modelling of forwarding distance to maximize the utilization of medium and high-power harvester technology
forwarder performance standards work productivity time consumption timber transport
2017/4/6
Every technologist aims to maximize the performance and capacity of vehicles, particularly when deployed in technological lines. To maximize the utilization of harvester technology, particularly of fo...
中国林学会木材科学分会
中国林学会 木材科学分会 木材科学
2022/6/6
中国林学会木材科学分会是中国林学会下属的木材科学专业学会，挂靠在东北林业大学，是集学术、科普、公益为一体的全国性社会学术团体，是党和政府联系广大木材科技工作者的桥梁和纽带。学会以国内高等农林院校和科研院所为主，包括设计、咨询、生产、贸易、管理等机构，横跨林业、建材、轻工、家具等行业，会员上千人，已发展成为推动我国木材科学技术研究的重要社会力量。学会成立近30年来，以“紧密团结国内外木材科学工作者，...
Treatment of rubberwood (Hevea brasiliensis) (Willd.ex A.Juss.) Müll.Arg.with maleic anhydride to prevent moulds
wood modification mold prevention leaching wood moisture content
2016/8/2
The rubberwood samples were treated with 0.5–10% maleic anhydride (MA) solutions. The treatment of wood with 2.5% MA was adequate to prevent the growth of moulds on wood for 1 year at least. The viabl...
Relation between selected indicators of forest stand diversity and quality of timber production in managed Central European forests
assortment species diversity structural diversity timber quality
2016/4/6
The present study examines the relationship between the quality of timber production and the species and structural diversity of forest stands. The data used came from a regional forest inventory of t...