聚酯纤维新产品开发现状及发展前景

介绍了新合纤的发展历程，综述了国内外聚酯纤维新产品开发及应用现状，分析了国内新产品开发所存在的问题，提出应“一条龙”开发新产品，并加强新产品的推广及开发的建议     

卫生陶瓷新产品的开发与质量控制

介绍了卫生陶瓷新产品开发的工作程序及开发中的一些经验做法，提出了开发中应注意的一些问题，相信对同行业新产品开发有一定的借鉴和指导作用。     

利用面向对象技术开发梭式窑绘图系统

阐述了面向对象技术的开发方法，并在基于CAD平台上的梭式窑设计软件的开发过程中加以使用，开发出用于图形绘制的ARX程序。实践证明，利用此技术所开发的软件可大大提高设计及绘图过程的效率及质量。     

重视化工开发中的中间试验

重视化工开发中的中间试验张树仁（化工部沈阳化工研究院）本文通过笔者实际工作中的点滴体会，概略地论述了整个化工开发中的过程研究的小试和中试的关系，中试的现状，中试的重点及中试车间的设置，目的在于引起化工科研单位及从事化工开发工作者，在当前形势下，有效利...     

文23气藏数值模拟研究

数值模拟是气藏开发的重要组成部分，本文以东濮凹陷中具低渗块状特征的文23气藏为例，通过数值模拟研究，评价气藏目前开发合理性及提出下一步开发调整政策，指导气藏的开发。     

CFRP加固修补混凝土结构新技术及应用

纤维增强塑料在土木工程中的应用是目前国际土木工程领域研究开发的一个热点，碳纤维复合材料加固修补混凝土结构技术是其中研究，开发与应用最成熟的技术，本文对该项技术的特点，使用材料，施工工艺及国内外研究开发的情况作了介绍，同时也对市场前景及存在的问题做了分析。     

浅议多功能无源负离子涂料的开发与应用

本文分析了无源负离子发生材料的历史发展，国内的开发生产状况，提出了无源负离子发生材料开发的可行性，在当前情况下开发生产本产品的重要性及其意义。     

含溴农药的研究开发概况

近年来，随着溴资料的开发，给我国含溴农药的研究带来了契机。本文介绍了国外含溴农药的开发沿革及品种，还对我国含溴农药的开发情况进行了概述，并介绍了建议开发的品种。     

农用薄膜防雾剂开发应用及其进展

防雾剂是聚合物薄膜改性的功能助剂，它的开发和应用对农林，园艺，蔬菜及食品包装薄膜都具有重要意义。本文综述防雾剂的化学结构，作用机理及国内外开发应用现状及其进展。     

国内外聚乙烯管材专用料的开发及应用

详细论述了国内外聚乙烯管材专用科的生产，开发及产品的使用情况，并根据目前国内的市场需求及未来的发展，提出我国聚乙烯管材专用料的开发方向。     

水性木器涂料在松木涂装中的应用

介绍了常用松木的特点、种类,水性木器涂料在松木涂装中的涂装类型及特点。并简述了用水性木器涂料进行松木涂装时的优缺点,以及松木的除油脂及施工水性封闭底漆的重要性。     

Preparation and characterization of wood‐(nylon 12) composites

The melting temperature of nylon 12 is lower than the degradation temperature of wood, which makes the preparation of wood‐(nylon 12) composites through a regular compounding/compression molding process possible. Results indicated that wood‐(nylon 12) composites had higher modulus of rupture, higher modulus of elasticity, and higher tensile strength than nylon 12, wood‐polypropylene (PP) composites, and wood‐high density polyethylene (HDPE) composites, respectively. Wood‐(nylon 12) composites also had higher thermal stability than wood‐PP composites and wood‐HDPE composites. Acting as a nucleating agent, wood increased the crystallization temperature and the degree of crystallinity of nylon 12 in wood‐(nylon 12) composites. The superior mechanical properties of wood‐(nylon 12) composites were ascribed to the good interfacial adhesion between wood and nylon 12 and the increased transcrystallinity of nylon 12 by wood. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 103:270–276, 2007     

A new pulverized biomass utilization technology

Pulverized wood biomass utilization technologies, such as gasification and liquefaction, were discussed. Firstly, pulverization technique of wood biomass by a vibration mill was introduced, and pulverized wood biomass characteristics were evaluated. The wood powder pulverized by the vibration mill had a round shape, and the wood fibers were completely broken. Therefore, the diameter of wood powder was fine and the crystallinity of cellulose was very low. By using this pulverized wood biomass, high temperature gasification experiment and liquefaction experiment were conducted. Gasification experiment was conducted in an entrained down flow gasifire. Since fine wood powder had a high reactivity, the gasification experiment showed the high gasification performance without a tar generation. Liquefaction experiment of wood biomass was conducted in a hot compressed water to produce saccharine. Pulverized wood biomass was also used as a raw material in the liquefaction experiment. By using very fine wood powder, productivity of saccharine increased dramatically.     

不同木粉比例PVC木塑界面的介观模拟以及力学性能预测

研究了DPD(耗散粒子动力学)方法模拟不同木粉比例的PVC木塑中木粉的分布状况,从介观尺度表征了木粉在材料中的聚集状态,通过木粉在木塑材料中的分布情况预测高木粉填充木塑材料的力学性能,并与试验值进行对比,得出当木粉含量达到15%~31.5%可以达到力学性能最优区间。     

CHARACTERIZATION OF MICROCELLULAR FOAMED POLYOLEFIN BLEND COMPOSITES WITH WOOD FIBER

The effects of wood fiber content on the void fraction, cell morphology, and notched Izod impact strength of microcellular foamed HDPE/PP blend composites with wood fiber were studied. The influence of wood fiber content on the carbon dioxide adsorption and desorption in the samples was also examined. Adsorption of carbon dioxide decreased with increased wood fiber content. Gas diffusion rates were faster as wood fiber content increased. The void fraction decreased dramatically when wood fiber was introduced in the blend. Environmental scanning electron microscopy (ESEM) was used to investigate the effects of wood fiber content on cell morphology. The 30:70 HDPE/PP polymer blend without wood fiber resulted in a high void fraction, with a uniform and well-developed microcellular structure, but when wood fiber was introduced, a uniform and well-developed microcellular structure could not be produced. The effects of foaming on Izod impact strength were dependent on wood fiber content.     

Wood processing variables and adhesive joint performance

In order to obtain a bonded wood product from the tree, wood must be subjected to a series of processes. These include, among others, vital processes like drying of the green wood and machining of the surfaces of the dried wood in preparation for bonding. However, when wood is machined with dull blades, thermal degradation of the wood frequently occurs. The effects of kiln drying and thermal degradation of wood on the performance of the adhesive joints subsequently formed from such wood were investigated. Tapered double cantilever beam (TDCB) test specimens obtained from hard maple and phenol–resorcinol–formaldehyde (PRF) adhesives were used in the investigations. The enhancement of fracture energy due to the reduction in the moisture content of wood, the improved performance of adhesive joints due to rejointing of wood surfaces before bonding, and the reduction of adhesive joint strength resulting from thermal degradation of wood are presented and discussed.     

木材构造对木材化学阻燃浸渍处理方法的影响

从木材构造对化学阻燃浸渍处理工艺影响的角度,指出在木材化学阻燃浸渍处理过程中,影响阻燃剂在木材中渗透性的木材主要微观构造有浸提物、纹孔等,分析了木材中水分的存在状态和木材中水分的移动与木材化学阻燃浸渍处理工艺的关系。探讨了强化木材化学阻燃浸渍处理的方法。采用微波技术提高木材的渗透性,采用超声波技术强化阻燃剂的浸渍。实验表明是一条可行的技术路线。     

建筑模板用聚乙烯基木塑复合材料的制备及其性能

以聚乙烯为基体,分别与木片、木质纤维、木质纤维粉制备了聚乙烯基木塑复合材料。分别利用液体石蜡、甲基丙烯酸甲酯、NaOH乙醇溶液、邻苯二甲酸酐乙醇溶液、H2O2乙醇溶液对木片、木质纤维、木质纤维粉进行预处理,并考察了相应木塑复合材料的拉伸强度和胶合强度。结果表明:邻苯二甲酸酐乙醇溶液和H2O2乙醇溶液对木材表面改性处理效果较为明显,相应的木塑复合材料的拉伸强度和胶合强度也更高;与木质纤维粉和木片相比,木质纤维与聚乙烯具有更好的相容性;当木质纤维质量分数为30%时,采用H2O2乙醇溶液预处理后,木塑复合材料的拉伸强度为28.2 MPa,胶合强度为8.68 MPa;利用邻苯二甲酸酐乙醇溶液预处理后,木塑复合材料的拉伸强度为26.7 MPa,胶合强度为7.92 MPa。     

Micro Analytical Methods for Determination of Compression Wood Content in Loblolly Pine

Abstract

All loblolly pine trees, especially the juvenile portion, contain various amounts of compression wood. The morphological, chemical, and papermaking properties of compression wood are distinctively different from those of normal juvenile wood and mature wood. Compression wood has higher lignin and galactan, but lower cellulose and mannan content, shorter average fiber length, lower fiber width but thicker cell wall, higher fiber coarseness and higher microfibril angles as compared with the corresponding normal wood. Micro analytical methods have been developed to quantitatively determine the percentage of compression wood in an incremental core so as to eliminate the effects of compression wood on the aforementioned properties. This enables accurate quantitative genetic analyses of these properties for tree breeding programs.     

木塑复合材的生产及应用

从木材的材质特性、木材的预处理、浸渍液体的组成、制备工艺等方面着重论述了木塑复合材的制备方法,比较了木材和塑复合材的性能,介绍了木塑复合材的应用情况。