Fundamental Investigation of Novel Bark-Based Lignocellulosic Nanofibrils for Composite Applications

用于复合材料应用的新型树皮木质纤维素纳米原纤维的基础研究

• 批准号: RGPIN-2017-06737
• 负责人: Yan, Ning
• 金额: $ 3.42万
• 依托单位: University of Toronto
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2018
• 资助国家: 加拿大
• 起止时间: 2018-01-01 至 2019-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=669142
• 关键词: Fundamental; Investigation; Novel; Bark; Based

There is a growing interest in utilizing renewable biomass materials to produce environmentally friendly products due to the concern for fossil fuel depletion and climate change. Bark, a waste stream produced in large quantities in saw mills and pulp and paper operations, is a valuable source of biomass that has found only a few low-valued usages in the industry. Over the last 6 years, we have developed extraction and conversion technologies for obtaining polyphenolic compounds from bark and to make value-added bark-based adhesives, resins, and foam products. However, depending on the wood species, a significant amount of solid residues still remain after the extraction. In order to realize the full potential of a bark biorefinery, utilization of all bark fractions, including the bark extraction residues, is necessary. The proposed NSERC Discovery application complements and extends our past work on bark biorefinery to focus on fundamental understanding of the nanofibrillation process of converting the bark extraction residues to highly promising novel bark-based lignocellulosic nanofibrils (BLNF) with a high lignin content. The specific research objectives that will be addressed by this NSERC proposal are to elucidate: 1) the role of bark microstructure and lignin on nanofibrillation processes of BLNF; 2) the effect of drying methods on structure, morphology, and surface topochemistry of BLNF; 3) the application of BLNF in thermoset and thermoplastic polymer composites as reinforcement for enhanced mechanical, thermal, and barrier performance. The mechanistic insights gained through these fundamental studies will contribute significantly to the realization of a true bark biorefinery process, by which all fractions of the bark materials are used for making valued added products. If successful, the bark-derived valued-added green chemicals and BLNF containing composites will reduce the market reliances on fossil fuel derived products and help transform Canadian forest mills into integrated biorefineries, greatly enhancing the forest sector's competitiveness in the global marketplace. HQP's trained by the project will be ideally suited to become the future leaders in the emerging bio-economy making significant contributions to Canada's long term prosperity and well-being.**

由于关注化石燃料耗尽和气候变化，对利用可再生生物量材料生产环保产品的兴趣越来越大。 Bark是一种在锯木厂，纸浆和纸张作业中大量生产的废物流，是一个有价值的生物质来源，在该行业中仅发现了少数低价值的用法。在过去的六年中，我们开发了提取和转化技术，用于从树皮获得多酚化合物，并制作基于增值的树皮粘合剂，树脂和泡沫产品。但是，根据木材的不同，提取后仍然存在大量的固体残基。为了实现树皮生物融资的全部潜力，必须利用所有树皮分数，包括树皮提取残留物。拟议的NSERC发现应用程序补充了我们过去对树皮生物融资的工作，专注于对将树皮提取残基转换为具有高lignin含量的高度有希望的基于Bark的木质纤维素纳米纤维（BLNF）的纳米纤维纤维化过程。该NSERC提案将解决的具体研究目标是阐明：1）树皮微结构和木质素在BLNF的纳米纤维化过程中的作用； 2）干燥方法对BLNF结构，形态和表面拓扑化学的影响； 3）BLNF在热塑性和热塑性聚合物复合材料中的应用作为增强机械，热和屏障性能的增强。通过这些基本研究获得的机械洞察力将对真正的树皮生物融资过程的实现产生重大贡献，在该过程中，所有树皮材料的所有分数都用于制造有价值的添加产品。如果成功的话，树皮衍生的价值添加的绿色化学品和含有BLNF的复合材料将减少化石燃料衍生产品的市场雷置，并有助于将加拿大森林磨坊变成综合的生物工艺品，从而大大提高了森林领域在全球市场上的竞争力。 HQP接受该项目的培训将非常适合成为新兴的生物经济学的未来领导者，这为加拿大的长期繁荣和福祉做出了重大贡献。