Hydrophobic Cellulose Foam Composition for Scalable Green Manufacturing
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Solution Overview
Problem
Existing methods for producing hydrophobic lightweight cellulose-based products, such as foams and foam papers, are inefficient and lack scalability, particularly in achieving high mechanical properties and hydrophobicity while being economically feasible.
Innovation Solution
A process utilizing cellulose pulp, hydrophobic suspension OAF, Chitosan solution in organic acids, and surfactants in specific weight percentages, combined with optional inorganic components, to create hydrophobic foams and foam papers through a single-step green chemistry method suitable for large-scale production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If existing methods are used to produce hydrophobic lightweight cellulose-based products, then some hydrophobicity can be achieved, but the process is inefficient and lacks scalability
Solution Approach 1:
The patent combines multiple functions into a single formulation: the hydrophobic suspension (OAF) integrates both hydrophobicity provision and mechanical reinforcement, while the chitosan solution in organic acids simultaneously acts as a binder and hydrophobic agent. This merging of functions into a single step achieves both improved productivity and ease of manufacture by eliminating multiple separate processing steps.
Solution Approach 2:
The patent optimizes specific parameter ranges: hydrophobic suspension at 2-10 wt%, chitosan solution at 0.5-5 wt%, and surfactants at 3-10 wt%. By controlling these parameters within specific ranges, the process achieves scalable production with consistent results, resolving the contradiction between productivity and manufacturability.
2Strength
If existing methods are used, then some hydrophobicity can be achieved, but high mechanical properties are not obtained
Solution Approach 1:
The patent creates a composite system combining cellulose pulp with hydrophobic suspension (OAF), chitosan solution in organic acids, and surfactants. This composite formulation simultaneously provides high mechanical properties through the synergistic interaction of components while maintaining production efficiency through a single-step process.
Solution Approach 2:
The chitosan solution in organic acids acts as an intermediary binder that bridges cellulose fibers and hydrophobic particles, transferring mechanical loads effectively. This intermediary component enables both high strength and efficient production by eliminating the need for complex multi-step processing.
3Ease of manufacture
If existing methods are used, then some hydrophobicity can be achieved, but economic feasibility is poor
Solution Approach 1:
The patent segments the formulation into three main components with specific concentration ranges: hydrophobic suspension (2-10 wt%), chitosan solution (0.5-5 wt%), and surfactants (3-10 wt%). This segmentation allows for straightforward material selection and process design, reducing complexity while maintaining economic feasibility through clear specification ranges.
Solution Approach 2:
The single-step process formulation performs multiple functions simultaneously: providing hydrophobicity, reinforcing mechanical properties, and enabling scalable production. This multi-functionality in a single process step eliminates the need for multiple specialized equipment and processing stages, thereby reducing process complexity and improving economic feasibility.
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 process achieves hydrophobic lightweight products with improved mechanical properties and hydrophobicity, suitable for applications in packaging, oil/water separation, fire retardancy, insulation, and electroconductivity, while being economically viable and scalable.
Implementation Method 1
The invention relates to a material or process for manufacturing hydrophobic cellulose-based light-weight products
Implementation Method 2
3 to 10 wt. % of surfactants to the pulp
Implementation Method 3
0.5 to 5 wt % of Chitosan solution in organic acids to pulp
Data Source
AI summary
The present invention relates to a material suitable for manufacturing hydrophobic cellulose-based light-weight products, such as foams and foam papers, comprisingany type of cellulose pulp from either soft wood or hardwood,2 to 10 wt. % of hydrophobic suspension (OAF) to pulp,0.5 to 5 wt % of Chitosan solution in organic acids to pulp, 3 to 10 wt. % of surfactants to the pulp. The invention also relates to a process of making said material and a use thereof.