Biodegradable Polymeric Material with Natural Fiber Reinforcement
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Solution Overview
Problem
Existing biodegradable plastics have poor mechanical properties and high manufacturing costs, and there is a need for a robust method to develop compostable products that can hold dry, wet, or damp materials at various temperatures.
Innovation Solution
A biodegradable composition comprising 10-95% biodegradable aliphatic-aromatic polyesters, 0.1-50% starch, 0.1-50% inorganic filler, 0.1-50% biomass fiber, and optional plasticizer and coupling agent, which exhibits improved mechanical properties and reduced manufacturing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional non-biodegradable plastics are used, then mechanical properties and durability are improved, but environmental harm and degradation time increase
Solution Approach 1:
The invention uses composite materials by combining polylactic acid (PLA) polymer with natural fibers (jute, hemp, or flax) to create a biodegradable plastic composition. This composite structure maintains mechanical strength while enabling biodegradation, resolving the contradiction between durability and environmental harm. The natural fibers reinforce the PLA matrix, providing structural integrity comparable to conventional plastics while the entire composition can decompose naturally.
2Object-affected harmful factors
If biodegradable plastics are used, then environmental harm is reduced, but mechanical properties deteriorate
Solution Approach 1:
The patent applies composite materials principle by creating a biodegradable plastic composition that combines polylactic acid with natural fibers. The natural fibers (jute, hemp, or flax) act as reinforcement agents that significantly improve the mechanical properties of the biodegradable matrix, resolving the typical weakness of biodegradable plastics while maintaining their environmental benefits.
3Object-affected harmful factors
If biodegradable plastics are used, then environmental harm is reduced, but manufacturing cost increases
Solution Approach 1:
The invention changes the material parameters by using polylactic acid, a bio-based polymer that can be produced from renewable resources like corn starch or sugarcane. This substitution of petroleum-based materials with bio-based materials reduces manufacturing costs while maintaining biodegradability and reducing environmental harm.
4Stability of the object's composition
If bio-based materials are used, then environmental sustainability is improved, but material availability and consistency worsen
Solution Approach 1:
The patent utilizes polylactic acid, a well-established bio-based polymer with consistent production parameters and standardized properties. This choice ensures material consistency and reliability while maintaining the environmental sustainability benefits of bio-based materials, resolving the contradiction between sustainability and material consistency.
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 biodegradable composition achieves 90% disintegration completion within 180-365 days in soil at ambient temperature, with enhanced mechanical properties such as rigidity, strength, and impact resistance, while maintaining a low manufacturing cost.
Implementation Method 1
The biodegradable composition achieves 90% disintegration completion within 180-365 days in soil at ambient temperature
Data Source
AI summary
The invention encompasses biodegradable compositions (e.g., biodegradable plastics) and methods of preparation and use thereof, and disposable products made from the claimed compositions. Raw materials for preparing the biodegradable plastic include one or more polymers, fiber, starch, a plasticizer, and a coupling agent. The biodegradable composition has the advantages of short degradation cycle, good mechanical properties, and a low manufacturing cost.