Micro-fibrillated cellulose development and application

微纤化纤维素的开发与应用

• 批准号: RGPIN-2018-04782
• 负责人: Olson, James
• 金额: $ 2.84万
• 依托单位: University of British Columbia
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2020
• 资助国家: 加拿大
• 起止时间: 2020-01-01 至 2021-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=713216
• 关键词: Micro; fibrillated; cellulose; development; application

The Pulp and Paper sector of the Canadian forest industry is at the forefront of the production of sustainable and renewable biomaterials. In addition to all of the various paper products that include printing and writing papers, hygiene products and packaging products, the sector is leading the development of novel fibre and polymer products. These products include Cellulose Nanocrystals by CellulForce, Cellulose microfibrils by FiloCell and kraft lignins by LignoForce. Cellulose micro/nano fibrils refer to cellulosic materials that have at least one dimension on the nano / micron scale. Such fibrillar materials are finding applications in a broad range of new materials that offer high strength, low density and other enhanced properties in hybrid composites, films, dispersions, foams, adhesives, etc. Cellulose micro/nano fibrils are currently manufactured from conventional kraft and chemithermomechanical pulp (CTMP) pulp fibres using mechanical processes. These processes include high pressure homogenization; microfluidization, grinding; crushing and high intensity ultrasonication; and other means to impart physical forces on the pulp fibres to break down the cell wall into its fibrillary components. All of these processes take tremendous amounts of energy. To reduce the energy consumption the fibres are typically chemically pre-treated with either alkaline-acid, enzymes or ionic liquids. The current limitations with these processes is that they are either too expensive in terms of capital costs, pre-treatment chemistry and energy costs or are too difficult to scale to industrial applications. One of the first applications of these cellulose fibrils will be in advanced cellulose fibre materials, such as advanced packaging, insulation and absorbency products. For example, cellulose fibrils provide the ability to create high strength and low density packaging materials that have exceptional insulation properties. This novel and renewable insulation material may be the key technology that enables e-groceries to revolutionize the food sector. The long-term objectives are to develop convert low value biomass into high value MFC for integration into a wide range of novel materials including high performance paper, ultra low-density foam formed materials and products and eventually into high strength, multi-scalar hybrid composites that have the potential to revolutionize everything from transportation to civil infrastructure (Khan and Kim, 2011). To accomplish this we will need a fundamental understanding of MFC/fibre suspension physics applied to the manufacturing, processing and product development phases.

加拿大林业的纸浆和造纸部门处于可持续和可再生生物材料生产的前沿。除了包括印刷和书写纸、卫生用品和包装产品在内的各种纸制品外，该行业还引领新型纤维和聚合物产品的开发。这些产品包括 CellulForce 的纤维素纳米晶体、FiloCell 的纤维素微纤维和 LignoForce 的硫酸盐木质素。 纤维素微/纳米原纤维是指具有至少一个纳米/微米尺度尺寸的纤维素材料。这种原纤维材料在各种新材料中得到了广泛的应用，这些新材料在混合复合材料、薄膜、分散体、泡沫、粘合剂等中提供高强度、低密度和其他增强的性能。 目前，纤维素微/纳米原纤维是使用机械工艺由传统牛皮纸和化学热机械浆（CTMP）浆纤维制造的。这些过程包括高压均质化；微流化、研磨；破碎和高强度超声波处理；以及向纸浆纤维施加物理力以将细胞壁分解成其原纤维成分的其他方式。所有这些过程都需要大量的能量。为了减少能耗，纤维通常用碱酸、酶或离子液体进行化学预处理。目前这些工艺的局限性在于，它们要么在资本成本、预处理化学和能源成本方面过于昂贵，要么难以扩展到工业应用。 这些纤维素原纤维的首批应用之一将是先进的纤维素纤维材料，例如先进的包装、绝缘和吸收性产品。例如，纤维素原纤维能够制造具有卓越绝缘性能的高强度和低密度包装材料。这种新颖的可再生绝缘材料可能是使电子杂货彻底改变食品行业的关键技术。 长期目标是开发将低价值生物质转化为高价值MFC，以集成到各种新型材料中，包括高性能纸张、超低密度泡沫成型材料和产品，并最终转化为高强度、多标量混合复合材料有潜力彻底改变从交通到民用基础设施的一切（Khan 和 Kim，2011）。为了实现这一目标，我们需要对应用于制造、加工和产品开发阶段的 MFC/纤维悬浮物理学有基本的了解。