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.

加拿大森林产业的纸浆和造纸业处于可持续和可再生生物材料生产的最前沿。除了包括印刷和撰写纸张，卫生产品和包装产品在内的所有各种纸产品外，该行业还领导着新型纤维和聚合物产品的开发。这些产品包括纤维素纳米晶体，纤维素微纤维由Filocell和木质粘蛋白通过木质纤维纤维纤维纤维纤维纤维。 纤维素微 /纳米原纤维是指在纳米 /微米尺度上至少具有一个维度的纤维素材料。此类纤维材料正在寻找多种新材料的应用，这些新材料可提供高强度，低密度和其他增强的杂种复合材料，膜，分散，泡沫，粘合剂等的性能。 纤维素微/纳米原纤维目前是使用机械工艺的常规牛皮纸和化学机械纸浆（CTMP）纸浆纤维生产的。这些过程包括高压均质化；微氟化，研磨；压碎和高强度超声化；以及其他手段将物理力赋予纸浆纤维，以将细胞壁分解成其纤维成分。所有这些过程都需要大量的能量。为了降低能耗，通常在化学上用碱性酸，酶或离子液体对纤维进行化学预处理。这些过程的当前限制是，它们要么在资本成本，预处理化学和能源成本方面太昂贵，要么太难扩展到工业应用。 这些纤维素原纤维的第一个应用之一将是晚期纤维素纤维材料，例如晚期包装，绝缘和吸收性产品。例如，纤维素原纤维提供了具有具有特殊绝缘特性的高强度和低密度包装材料的能力。这种小说和可再生的绝缘材料可能是使电子杂货店能够彻底改变食品领域的关键技术。 长期目标是将低价值的生物量转化为高价值MFC，以集成到广泛的新型材料中，包括高性能纸，超低密度泡沫形成的材料和产品，并最终成为高强度，多量表多型混合复合材料，这些复合材料具有从运输到民用基础设施（Khan and Kim，Kim，2011年）的一切革命性的潜力。为此，我们将需要对应用于制造，加工和产品开发阶段的MFC/纤维悬浮物理学的基本了解。