关键词: 多维结构, 纳米纤维素, 再生纤维, 纤维素膜, 功能材料

Abstract:

Significance Driven by global sustainable development goals to reduce reliance on petrochemical-based plastics and developing green, low-carbon alternative materials have become a key focus in both academia and industry. Cellulose, as a natural polymer, is an ideal candidate to replace traditional plastics due to its excellent biocompatibility and low toxicity. With advancements in nanotechnology, material science, and chemical modification techniques, natural cellulose can be transformed into various forms, including nanocellulose, regenerated cellulose fibers, regenerated cellulose films, and cellulose-based aerogels. These multidimensional structures exhibit unique functional properties and can be widely applied in pharmaceutical excipients, smart textiles, degradable packaging materials, and energy-efficient water purification materials. Therefore, studying the preparation methods, properties, and applications of cellulose-based materials is of great academic and practical significance, providing a theoretical foundation and technical support for the development and industrialization of green alternative materials.

Progress In recent years, research into cellulose-based materials has advanced considerably, driven by the growing demand for sustainable alternatives to petrochemical-based products. Through chemical modification and nanoscale processing techniques, natural cellulose can now be transformed into a range of innovative materials with diverse structural forms, including low-dimensional nanocellulose, one-dimensional regenerated cellulose fibers, two-dimensional regenerated cellulose films, and three-dimensional cellulose-based aerogels. These various structural forms offer distinct advantages in terms of mechanical properties, processing technologies, and functional applications. For example, nanocellulose, with its high surface area, nanoscale dimensions, and exceptional mechanical strength, has gained significant attention in fields such as composites, sensors, and biomedical applications. The remarkable properties of nanocellulose allow it to be used as a reinforcing agent in composites, enhancing the material's strength while remaining lightweight. Regenerated cellulose films have seen notable progress in applications such as smart packaging, where their ability to respond to environmental stimuli has made them particularly suitable for developing responsive, eco-friendly packaging solutions. Additionally, cellulose-based aerogels are lightweight, highly porous materials with superior adsorption properties. They are increasingly being explored for their potential in energy storage, thermal insulation, and environmental protection, particularly for applications such as oil spill cleanup and water purification. Moreover, the biodegradability of cellulose materials and their minimal environmental impact make them promising substitutes for traditional petrochemical-based materials. As environmental concerns escalate, cellulose-based materials are viewed as viable and sustainable options, offering a greener alternative for many industrial applications. This transition to renewable, biodegradable resources represents a significant step toward achieving global sustainability goals and reducing dependence on non-renewable resources.

Conclusion and Prospect The research and application of cellulose-based multidimensional materials have demonstrated great promise, offering extensive potential across various industries, ranging from packaging to environmental protection. However, significant challenges persist, especially in the realms of processing techniques, optimization of material properties, and feasibility of large-scale production. One of the primary obstacles is the necessity to refine the methods employed for fabricating and modifying cellulose materials, ensuring their efficient and consistent production at a commercial scale. Additionally, while cellulose materials possess remarkable properties such as biodegradability and versatility, further advancements are necessary to enhance their mechanical strength, durability, and functional capabilities in order to meet the requirements of a wide range of applications. Future research should concentrate on exploring the full potential of cellulose materials in multidimensional structural transformations. Innovations aimed at improving the mechanical properties of cellulose-based materials, such as increasing their tensile strength or impact resistance, will be crucial for broadening their industrial applications. Functionalization, which refers to the ability to customize the properties of cellulose for specific applications, is another significant area of focus. This could involve developing cellulose materials with advanced characteristics like water resistance, antimicrobial properties, or responsive behaviors, which are suitable for use in smart textiles and packaging. Furthermore, ensuring the sustainability of these materials is crucial, as cellulose is inherently renewable. However, the processes used to manufacture and modify it must be environmentally friendly and energy-efficient. With the ongoing advancement of green chemistry, cellulose materials are likely to find commercial applications in various sectors, particularly in biodegradable packaging, smart textiles, and environmental protection. Researchers and industry leaders need to prioritize balancing multifunctionality with environmental impact, ensuring that cellulose-based materials offer practical solutions while also supporting the transition to a green, low-carbon economy. It will necessitate continued innovation, collaboration, and investment in both research and industrial scaling.

Key words: multidimensional structure, nanocellulose, regenerated fiber, cellulose film, functional material