Nanometer Magnesium Oxide Deacidifying Agent for Cellulose Acetate Film
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Cellulose acetate film archives suffer from acetate syndrome, characterized by hydrolysis leading to mechanical degradation and loss of image integrity, with existing deacidification methods affecting image information and mechanical properties.
Innovation Solution
A deacidifying and reinforcing agent is developed by dispersing magnesium oxide nanoparticles in an ethyl cellulose n-butanol solution, combined with E51 EPOXY RESIN and a curing agent, to form a nanometer suspension that inhibits autocatalytic acid action and enhances film durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If conventional inorganic bases are used for deacidification, then acid neutralization is achieved, but image information and mechanical properties are adversely affected
Solution Approach 1:
The patent changes the physical parameter of the deacidifying agent from conventional large-particle inorganic bases to nanometer-scale magnesium oxide particles (5-50 nm). This parameter change enables the agent to penetrate and neutralize acid throughout the film structure without concentrating at the surface, thereby avoiding damage to image information while effectively reducing acidity.
Solution Approach 2:
The patent creates a composite material system combining nanometer magnesium oxide with ethyl cellulose and n-butanol. This composite formulation allows the deacidifying agent to be uniformly distributed and retained within the film matrix, providing sustained acid neutralization while the ethyl cellulose component protects the mechanical integrity and image information of the film.
2Object-affected harmful factors
If deacidification treatment is applied to cellulose acetate film, then acid neutralization is achieved, but mechanical properties deteriorate
Solution Approach 1:
The patent introduces ethyl cellulose as an intermediary carrier that mediates between the nanometer magnesium oxide deacidifying agent and the cellulose acetate film. The ethyl cellulose forms a protective matrix that delivers the deacidifying agent throughout the film while simultaneously reinforcing the mechanical structure, preventing the deterioration that would result from direct application of inorganic bases.
3Object-affected harmful factors
If hydrolysis reaction occurs in cellulose triacetate, then deacidification might be achieved, but chain breakage and mechanical degradation occur
Solution Approach 1:
The patent applies preliminary anti-action by using nanometer magnesium oxide to neutralize acid before it can catalyze further hydrolysis reactions. The nanometer scale allows the base to reach and neutralize acid throughout the film matrix, preventing the autocatalytic hydrolysis that would otherwise continue to break down molecular chains and degrade mechanical properties.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The agent effectively deacidifies and reinforces cellulose acetate films, preventing further aging, improving mechanical properties, and allowing for the use and digitization of degraded films without affecting image information.
Implementation Method 1
Acetate syndrome is mainly caused by hydrolysis of cellulose triacetate... With autocatalysis of the acid as a catalyst, hydrolysis reaction is accelerated... an effective way to treat acetate syndrome is inhibiting autocatalysis of acetate gas emitted by degradation of cellulose acetate film
Implementation Method 2
formed by ultrasonically dispersing a magnesium oxide with particle sizes of 20-50 nm into an ethyl cellulose n-butanol solution
Implementation Method 3
adding a mixture of E51 EPOXY RESIN and a curing agent thereof... E51 EPOXY RESIN and the curing agent thereof with excellent film-forming ability and adhesiveness increase the adhesion and heat resistance of the film
Data Source
AI summary
A method for preparing a deacidifying and reinforcing agent for a cellulose acetate film includes steps of: ultrasonically dispersing a nanometer alkaline oxide into an ethyl cellulose n-butanol solution, so as to form a nanometer alkaline oxide suspension, then adding a mixture of E51 EPOXY RESIN and a curing agent thereof; wherein the nanometer alkaline oxide is a nanometer magnesium oxide, a nanometer cerium oxide, a nanometer magnesium hydroxide, a nanometer potassium carbonate, a nanometer calcium hydroxide or a nanometer barium hydroxide. A method for using the deacidifying and reinforcing agent includes steps of: evenly applying the deacidifying and reinforcing agent on a surface of a cellulose acetate film.