Assessing Fire-Damage in Historical Papers and Alleviating Damage with Soft Cellulose Nanofibers

Area of Science:

• Materials Science
• Conservation Science
• Chemistry

Background:

• Historical paper objects with high cultural value require specialized conservation.
• Fire, heat, and water damage present complex challenges for paper preservation.
• Understanding the microstructural and chemical changes in fire-damaged paper is crucial for effective treatment.

Purpose of the Study:

• To analyze the structural and chemical alterations in fire-damaged historical paper.
• To develop a novel stabilization method for severely damaged paper artifacts.
• To ensure the long-term preservation and accessibility of historical information contained within damaged documents.

Main Methods:

• In-depth analysis of fire-damaged paper samples from a 17th-century library fire.
• Microscopic and spectroscopic examination to identify changes in cellulose structure, porosity, and water sorption.
• Development and application of a cellulose nanofiber coating for stabilization.

Main Results:

• Fire damage causes significant nano- and micro-structural changes, including increased porosity and water sorption.
• Cellulose undergoes chain cleavage and cross-linking in less charred areas.
• The cellulose nanofiber coating forms a flexible, transparent film that adheres strongly to the damaged paper matrix.

Conclusions:

• The developed cellulose nanofiber coating effectively reduces paper fragility and enhances stability.
• This method facilitates the retrieval of historical information and enables digitization of damaged documents.
• The technique offers a promising solution for the conservation of severely fire-damaged historical papers.