Nanocellulose (NC) is the most abundant biomass resource on earth. It has the advantages of easy degradation, regeneration, non-toxicity and easy availability. It is expected to replace traditional petrochemical resources and be used to produce various advanced functional materials with high added value. According to the preparation method and source of nanocellulose, nanocellulose can generally be divided into three categories: cellulose nanocrystals (CNC), cellulose nanofibers (CNF) and bacterial cellulose (BC).

Nanocellulose functional materials for chiral photonics

Chirality is ubiquitous in nature and plays an important role in life sciences and materials science. CNC is a nanoscale chiral photonic crystal material. The chiral nematic liquid crystal phase structure of CNC can be used not only to prepare functional film materials with high mechanical properties and special optical properties, but also as a raw soft template to induce nanoparticles to form functional materials with chiral structure. Therefore, it has important application value in the fields of chiral catalysis, chiral metamaterials, polarization encryption, and biosensing.

Nanocellulose functional materials for software drivers

In recent years, based on various synthetic polymer-derived soft matter materials, such as typical hydrogels, liquid crystal elastomers, and shape memory polymers, scientists have ingeniously designed a variety of biomimetic intelligent actuators to imitate or even surpass the biological drive behavior. However, these traditional polymer-based materials are usually synthesized through complex processes, are costly, and difficult to degrade or recycle, which may impose certain burdens on the environment. Notably, nanocellulose-based biomimetic soft actuators are receiving increasing attention due to their superior mechanical flexibility, high moisture absorption capacity, sustainability or eco-friendliness, reusability or biodegradability, and biocompatibility. Much attention and attention.

Nanocellulose functional materials for energy storage

Due to its large specific surface area, excellent mechanical flexibility, good chemical stability and environmental friendliness, and the interconnection between fibers, nanocellulose is easy to form a porous structure that facilitates ion and electron transport; the surface of the fiber is attached with hydroxyl, carboxyl, etc. The hydrophilic functional group has good moisturizing ability in the electrolyte solution, and its derived functional materials have broad application prospects in the field of energy storage. Nanocellulose-based functional materials can not only serve as various components in energy storage devices, such as separators, electrolytes, adhesives, and carriers. At the same time, through strategies such as high-temperature carbonization, in-situ chemical polymerization, and electrochemical deposition, they can be combined with electroactive materials to obtain finer nanostructures and excellent electrochemical properties.

Nanocellulose functional materials for biomedicine

In a dry state, the mechanical properties of nanocellulose are comparable to those of human bone, while in a wet state, the physicochemical properties of nanocellulose are similar to those of extracellular matrix. At the same time, in addition to excellent physical and chemical properties, nanocellulose has high compatibility with other polymers or functional materials, which makes nanocellulose-based functional materials have good practical value and broad application prospects in the biomedical field.

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