Nanocellulose is a type of nanofiber material obtained from natural cellulose through mechanical, chemical or enzymatic treatment. It has the characteristics of high specific surface area, high strength, renewable and good Its excellent physical and chemical properties have attracted more and more attention in the field of cultural relics protection, especially in the restoration of wooden coffins in museums.biocompatibility .

1. Main problems faced in wooden coffin repair

Wooden coffins collected in museums have often experienced hundreds or even thousands of years of burial and environmental changes, and commonly suffer from the following damage conditions:

Severe degradation of lignocellulose : resulting in loose structure and insufficient strength.

Insect infestation, decay and cracks : affect overall stability.

Deformation and cracking caused by changes in moisture content。

Traditional repair materials have poor adhesion or insufficient compatibility with wood , which can easily cause secondary damage.

These problems place requirements on repair materials that are high strength, lightweight, reversible, safe and compatible with wood structures.

2. Advantages and characteristics of nanocellulose

High strength and significant reinforcement.
Nanocellulose has excellent mechanical properties and can penetrate into the fine pores of wood and form hydrogen bonds with the wood microstructure, thus improving the overall strength and stability of the coffin.

Highly compatible with natural wood structures.
It is derived from plant fibers and is consistent with the main components of wooden coffins. There is no risk of peeling or aging caused by material incompatibility.

Adjustable bonding properties

Nanocellulose can be compounded with other water-based systems (such as water-soluble resin) and used for crack filling or structural reinforcement, which can not only provide strength but also maintain the principle of reversibility of cultural relics.

The good breathability and environmental protection
will not block the original respiration of the coffin, and it does not contain volatile organic compounds, making it very suitable for use in closed environments in museums.

3. Specific application methods of nanocellulose in coffin repair

1. Timber structural reinforcement

Infiltrating nanocellulose dispersion into soft areas can penetrate deep into wood cell cavities and cell wall cracks to restore local strength. After reinforcement, the hardness of the wood increases significantly while maintaining the original appearance.

2. Crack filling and interface repair

Nanocellulose gel is mixed with a small amount of inert filler to prepare a transparent or translucent slurry that can be used to fill cracks and defects in coffins. Its good fluidity and adhesion make repairs more natural and unobtrusive.

3. Surface protection and stabilization treatment

The nanocellulose film can form a thin, transparent and tough protective layer to improve the wear resistance and moisture resistance of the coffin surface without affecting its cultural relic value and visual effect.

4. Compound with traditional repair materials

In research, nanocellulose is often combined with materials such as gelatin, starch, and carboxymethyl cellulose to improve the strength, toughness, and operability of the composite repair agent, making it more suitable for the structural repair of large wooden coffins.

4. Case significance and future development

In some archaeological coffin restoration projects, nanocellulose has demonstrated better permeability and compatibility than traditional reinforcement materials, allowing the wood structure to be effectively supported without changing the original characteristics. This green, reversible and efficient restoration method complies with the principles of ' minimum intervention ' and ' material reversibility ' of modern museum cultural relics protection .

In the future, with the development of nanocellulose composite materials, their applications in the restoration of wooden cultural relics will become more diverse, such as intelligent humidity adjustment films, anti-biodegradable coatings, controlled-release anti-mildew systems, etc., providing more innovative directions for coffin repair.

Technical features of Nanjing Tianlu Nano Technology Co., Ltd.

As one of the earliest companies in China to deploy nanocellulose industrialization, the company has advantages in the following aspects:

High product stability : The multi-stage dispersion and purification process ensures that the nanocellulose particle size is stable and has few impurities, which is more suitable for the high material stability requirements of cultural relic restoration.

Strong customization capabilities : parameters such as viscosity, solid content, and surface modification can be customized according to the characteristics of coffins of different ages and wood species.

Solid foundation for scientific research cooperation : The company has carried out a number of industry-university-research cooperation in the field of cultural relic protection materials, and continues to optimize product performance based on actual restoration needs.

Pay attention to reversibility and safety : The research and development direction always follows the international cultural relic protection guidelines to ensure that the restoration materials are controllable, reversible and traceable.