Nanocellulose Water-Based Foam for Stable Biodegradable Mulch Films
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Foam systems are inherently unstable due to film drainage, coalescence, and disproportionation, limiting their applications, and traditional mulch materials like plastic films cause environmental issues.
Innovation Solution
A nanocellulose-containing ultrastable water-based foam is prepared by mixing sodium dodecyl sulfate, tetradecanol, polyvinyl alcohol, and nanocellulose hydrogel, forming a multilayer foam structure that enhances stability and mechanical strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If traditional plastic mulch films are used, then mulching functions are achieved, but environmental pollution and soil damage occur
Solution Approach 1:
The invention changes the physical and chemical parameters of the mulch film by using water-based foam instead of traditional plastic materials. The foam system comprises water (96-99.5 parts), surfactant (0.5-5.0 parts), and polymer (0.1-3.0 parts), creating a biodegradable alternative that maintains mulching functions while eliminating environmental pollution
Solution Approach 2:
The invention uses composite material system consisting of surfactant and polymer in water-based foam. The surfactant reduces surface tension for foam formation, while the polymer provides film-forming and stabilizing properties, creating a composite material that is both functional and environmentally friendly
2Stability of the object's composition
If foam stabilizers are added to improve foam stability, then foam stability increases, but material cost increases and material performance deteriorates
Solution Approach 1:
The invention uses polymer as an intermediary substance that mediates between the surfactant and water phases. The polymer forms a protective network around the foam bubbles, providing stability without requiring additional chemical stabilizers, thus maintaining material performance while achieving foam stability
Solution Approach 2:
The invention optimizes the concentration parameters of surfactant (0.5-5.0 parts) and polymer (0.1-3.0 parts) to achieve the desired foam stability. By carefully controlling these parameters, the system achieves stable foam without excessive stabilizer addition, maintaining cost-effectiveness and material performance
3Ease of operation
If liquid foam mulch film is prepared by emulsification, then sprayability is improved, but foam stability is poor
Solution Approach 1:
The polymer acts as an intermediary that bridges the liquid foam and stable film formation. When the water-based foam is sprayed, the polymer facilitates film formation on the soil surface while maintaining foam stability during the transition from liquid to film state
Solution Approach 2:
The invention optimizes the ratio of surfactant to polymer and controls the foam generation parameters to create a foam system that is sprayable yet stable. The specific concentration ranges and mixing conditions ensure the foam maintains stability during application and after deposition
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 foam maintains stability for over 20 days, reduces chemical emulsifier use, and is biodegradable, offering environmental benefits and effective soil management.
Implementation Method 1
nanocellulose hydrogel
Implementation Method 2
nanocellulose hydrogel
Implementation Method 3
surfactant molecules, which can effectively adsorb at the three-phase interface
Implementation Method 4
surfactant molecules, which can effectively adsorb at the three-phase interface and reduce the surface free energy of the system
Implementation Method 5
alcohol to form a monolayer at the interface
Implementation Method 6
alcohol to form a monolayer at the interface, which can provide mechanical strength and prevent bubble coalescence
Implementation Method 7
polymer, and the balance water; the above components are stirred at a high speed to generate a foam
Implementation Method 8
polymer, and the balance water; the above components are stirred at a high speed to generate a foam
Implementation Method 9
nanocellulose has a very high specific surface area, which can provide a large number of adsorption sites and promote the effective adsorption of surfactant molecules
Implementation Method 10
nanocellulose has a very high specific surface area, which can provide a large number of adsorption sites and promote the effective adsorption of surfactant molecules, thereby reducing the surface tension of a liquid and helping the formation and stability of the foam
Data Source
AI summary
The present invention belongs to the field of chemical industry and discloses a nanocellulose containing ultrastable water-based foam, a method of preparing the same, and uses thereof. The foam comprises, by mass fraction, the following components: based on 100 parts of the total mass of a compound water-based foam, 0.1-2.0 parts of nanocellulose hydrogel, 0.5-5.0 parts of sodium dodecyl sulfate, 1.0-5.0 parts of tetradecanol, 0.1-3.0 parts of polyvinyl alcohol, and the balance water. The above components are stirred at a high speed to generate a foam, thereby obtaining the nanocellulose containing ultrastable water-based foam.