High resin content natural matrix–natural fibre biocomposites

Composites of good performance formed from non-woven mats of flax and hemp fibres and natural resin matrices have been prepared. Both higher density thin composites as well as lower density thicker composites have been prepared. Two natural matrices types were used: (i) commercial mimosa flavonoid tannin extract with 5% hexamine added as hardener and (ii) a mix of mimosa tannin + hexamine with glyoxalated organosolv lignin of low molecular weight, these two resins mixed 50/50 by solids content weight. The composites prepared were tested for MOE in bending and in tension and for maximum breaking strength in tension. Some of the mats were corona treated and the optimum length of corona treatment determined to improve the composites MOEs and breaking strength. These were related to the morphology of the treated fibre. Thermomechanical analysis (TMA), Brinell surface hardness and contact angle tests were also carried out with good results. The composites made with the mix of tannin and lignin resins as a matrix remained thermoplastic after a first pressing. The flat sheets prepared after the first pressing were then thermoformed into the shape wanted.     

对环境友好型小区景观设计的几点思考

针对环境友好型小区景观建设的绿化指标、地面保水指标、节水指标以及污水、垃圾处理指标,指出了环境友好型小区景观设计应以植物材料的设计为基础,有效进行垃圾分类和有机垃圾的再利用,建立集雨园,进行地表覆盖、特种绿地的绿化,建立乔灌草的复层立体绿化模式替代单一的草坪绿化模式,同时倡导室内绿化。     

探析构建环境友好型土地利用模式——以江西省新建县为例

在提出构建环境友好型土地利用模式的目标基础上,以江西省新建县土地发展现状为依据阐述构建环境友好型土地利用模式的建议,并立足实践工作进行探析。     

云南省发展无公害蔬菜的优势及对策探讨

云南是一个以农业生产为主的省份。文章探讨了云南发展无公害蔬菜的优势:独特的气候、生态环境形成了典型的山区小气候多样化气候特点和丰富的蔬菜种质资源,以及地理区位、市场容量和政策服务等优势。提出了强化市场准入制度和标准化建设、强化组织领导与宣传引导相结合、强化和依靠科技、强化“云南”这个大品牌建设是进一步发展云南无公害蔬菜的对策。     

影响阻燃胶合板胶合强度因素的研究

分析了使用BL-环保阻燃剂压制环保阻燃胶合板过程中,热压温度、热压时间、单板浸渍时间和涂胶量对胶合强度的影响,并检测了氧指数、甲醛释放量和含水率。研究表明,使用BL-环保阻燃剂生产环保阻燃胶合板可以达到胶合强度标准,并提出了最佳工艺条件。     

A study of the oxygen plasma treatment on the serviceability of a wool fabric

Low temperature plasma (LTP) treatment using oxygen gas was applied to a wool fabric. The LTP treated wool fabric was tested with several methods: ASTM D5035-1995, ASTM D1424-1996, AATCC Test Method 99-2000, AATCC Test Method 61-2001 1A, AATCC Test Method 15-2002 and AATCC Test Method 8-2001 and the results were compared with the industrial requirements (ASTM D3780-02 and ASTM D4155-01). The results revealed that the LTP treated wool fabric could fulfil the industrial requirements. The results of the investigation were discussed thoroughly in this paper.     

铝塑复合门窗的性能分析及推广应用

摘针对铝塑复合门窗产品的性能,从隔热保温、密封性、节能环保等多方面进行分析,指出铝塑复合门窗作为新型的节能环保门窗,性能优良,符合建筑材料推广应用的要求,其前景广阔。     

江津市土地利用与生态环境建设协调发展研究

为了便于因地制宜地协调江津市土地利用与生态环境建设,文章通过综合分析土地利用现状和土地利用中的生态环境问题及成因,探讨了综合生态环境建设与保护分区,并提出了各区环境友好型土地利用模式。     

农户环境意识对环境友好行为的影响——社区环境的调节效应研究

为了解和掌握农户环境友好行为的影响因素,基于重庆市403份农户样本的调查数据,运用相关分析法,层次回归分析法检验农户环境意识对环境友好行为的影响,并引入农村社区环境作为调节变量,分析社区环境对农户环境意识与环境友好行为间关系的调节效应。结果表明:环境行动技能、环境保护态度对农户环境友好行为具有显著正向影响,农村社区内的环境公共服务、环境政策执行均对农户环境意识—环境友好行为关系有显著的调节作用。结合农村需求提出如下促进农户环境友好行为的政策建议:1)加强对环境保护的宣传和鼓励,培养农户的环境保护态度;2)加强对环境友好型农业技术的推广应用,提升农户环境行动技能;3)创造生态文明型社区环境,营造环境友好的农村社区氛围,促进农户对环境友好行为的采纳。     

云南省发展无公害蔬菜的优势及对策探讨

650223 云南省昆明市学府路云南省农业科学院农业质量标准与测试技术研究所