Laboratory-made cement-bonded OSB with negligible swelling: fact or fantasy?

The purpose of this paper was to evaluate the dimensional stability of cement-bonded oriented strand boards produced from fir strands, which have previously been chemically modified at a weight gain of 10.4%, after 30 min reaction with acetic anhydride. The strands were used to form laboratory boards, which were tested in accordance with EN standards. Boards made from these acetylated strands exhibited negligible thickness swelling even after one month of immersion in water.     

Laboratory-made cement-bonded OSB with negligible swelling: fact or fantasy?

The purpose of this paper was to evaluate the dimensional stability of cement-bonded oriented strand boards produced from fir strands, which have previously been chemically modified at a weight gain of 10.4%, after 30 min reaction with acetic anhydride. The strands were used to form laboratory boards, which were tested in accordance with EN standards. Boards made from these acetylated strands exhibited negligible thickness swelling even after one month of immersion in water.     

夏天猫猫音乐会 爱上“这种爱”·金莎

你喜欢和自己亲爱的猫猫说早安,你喜欢和猫猫一问一答地说话。温暖的午后,阳光温暖着心扉,一把吉他,轻声地哼唱着……请张开双臂,加入这场夏天与猫猫的音乐会     

Perceived minerality in sauvignon blanc wine: Chemical reality or cultural construct?

The study aimed to determine the relationship between perceived mineral character in wine and wine chemical composition. We investigated the sensory properties and chemical composition of sauvignon blanc wines from two major sauvignon-producing countries, New Zealand and France. Sensory experiments employing 16 wines (8 French, 8 New Zealand) were conducted in Marlborough, New Zealand and in three regions of France, namely Bordeaux, Burgundy, and the Sancerre/Loire region. Wine professionals (31 New Zealanders and 32 French professionals) sensorially characterised the 16 wines under three conditions, bouquet only (ortho-nasal olfaction), palate only (nose clip condition), and full tasting (global condition: ortho-nasal olfaction, retronasal olfaction, taste, trigeminal stimulation). Sensory data from the global condition only are reported in this article. Physical and chemical analyses conducted on all wines included wine standard parameters, elemental composition, volatile aroma composition, and measures of organic acids. Major results demonstrate that (i) on average French and New Zealand wines were perceived similarly in intensity of mineral character, although judgments to individual wines differed as a function of participant culture; (ii) French and NZ participants drew on different information to make their sensory judgments; and (iii) several aspects of wine composition associated positively with perception of mineral character while others associated negatively, the significant associations differing as a function of participant culture.     

Coordination of saw blade tensioning with rotation speed: myth or reality?

This paper presents the author’s viewpoint of the problem connected with the coordination of circular saw blade tensioning and operating rotation speed. The paper provides practical recommendation and new ideas. All the studies have been performed at the TsNIIMOD in Russia.     

可降解纤维的发展

叙述开发可降解纺织品的现实意义,简介各类可降解纤维的制作方法,描述了可降解纺织品的广阔用途。     

可降解塑料包装 离我们有多远

近年来，我国塑料包装行业的发展可用“命途多舛”来形容。在经历了反倾销、“限塑令”、原材料涨价的多重冲击之后，2008年暴发的全球性金融危机又将塑料包装行业卷入了衰退的漩涡，市场步入“寒冬”。     

Degradable Wheat Gluten Films: Preparation, Properties and Applications

Degradable films from spray-dried (SD) and flash-dried (FD) wheat gluten prepared at various pHs, salt levels, temperatures, and shearing times were compared. Differences were observed in properties of the films related to processing conditions. Films prepared from SD wheat gluten were thicker, and had higher tensile strengths and Young's moduli. SD wheat gluten solutions applied as coating material resulted in Grade A-quality shell eggs maintaining quality for 30 days at room temperature. Additionally, SD wheat gluten coating increased the water stability of starch-based packaging.     

生物可降解高分子及其应用

介绍了生物可降解高分子材料的降解机理和降解性 ,以及生物可降解高分子材料在生物医学领域里的应用情况     

可降解淀粉基包装材料研究进展

不可降解塑料软包装废弃物所造成的白色污染正在引起世界各国的重视,其中塑料软包装材料的后处理成为关注的焦点.本文着重介绍了目前国外淀粉基可降解包装材料的种类、性能特点、制备工艺,以及高聚物/淀粉复合包装材料的发展趋势.     

环保可降解聚丙烯纤维及制品

介绍了一种改性环保可降解聚丙烯纤维及其制品奥力芬环保布，该产品用于户外帐篷、广告伞、太阳伞、沙滩椅等。在一年半的使用寿命期内，具备较强的抗老化、抗紫外性能；一年半使用寿命外，该产品能快速生物降解，对环境不造成污染。     

改性淀粉在降解塑料中的应用

降解塑料是现代包装材料的必然发展 ,淀粉基降解塑料是降解塑料的研究热点。本文在简单介绍降解塑料的基础上对淀粉基塑料的分类以及化学改性淀粉和物理改性淀粉在淀粉基降解塑料中的应用进行了重点阐述 ,以期能为淀粉基塑料的开发提供参考     

淀粉树脂的研究与应用

淀粉是一种用途广阔前景看好目前比较热门的多糖。本文综述了多年来国内外淀粉树脂的研究、开发和生产状况以及今后的发展方向，并介绍了淀粉脂在各领域的应用。     

用即弃聚丙烯纺粘法非织造布的可光降解研究

通过在聚丙烯中加入掺杂1%(质量分数)Cu2+的锐钛矿型纳米TiO2作为光敏剂,采用纺粘法设备制备TiO2光敏剂含量为0.0%~1.2%的聚丙烯纺粘法非织造布。将其置于70℃、340 nm紫外光下进行光降解试验,研究样品的力学性能、结晶度和表面形态的变化。结果表明:在聚丙烯中加入Cu2+掺杂的锐钛矿型纳米TiO2,可以催化聚丙烯纺粘法非织造布的光氧化降解和加快降解速度,且在实验范围内光敏剂的含量越大,其光催化降解作用越强。     

羊毛角蛋白降解行为机理

采用巯基乙醇—还原法对羊毛纤维进行溶解 ,根据羊毛纤维的分子结构及热力学解释来分析羊毛角蛋白降解行为机理 ,目的在于更有效的利用羊毛资源。     

可降解塑料的发展与绿色环保

论述了可降解塑料的发展与绿色环保之间的关系。阐明了有危害塑料制品的分类及对环境的危害;讨论了可降解塑料的降解机理及优点;高淀粉含量生物降解塑料,不仅可节约30％～60％的石油化工资源,还可大大减少垃圾的产生量,起到减轻环境污染的作用。可降解塑料的发展对绿色环保实施起着决定性的作用。     

大豆分离蛋白基可降解膜的研究进展

随着环境问题日益凸显,新型绿色包装材料成为研究热点。大豆作为我国主要农产品被广泛接受。大豆分离蛋白作为天然大分子,其较好的成膜能力和生物降解性逐渐成为石油基高分子材料的替代品之一,被广泛应用于生产生活中。该文以大豆分离蛋白为成膜基质,综述对大豆分离蛋白的本体改性、表面改性、纳米改性以及与聚合物共混改性等,以改善可降解膜性能,满足更多应用要求,并对可降解膜的应用和发展前景进行分析与展望。