Nano-Sized Inorganic Particle Dispersion in Polymer Composites
Solution Overview
Problem
Existing methods fail to uniformly disperse nano-sized inorganic particles within polymers, leading to aggregation and instability, which limits the mechanical and thermal properties of polymer composites.
Innovation Solution
A method involving the mixing of aqueous polymer dispersion with an aqueous colloidal solution of inorganic particles, followed by coagulation and drying to create a co-aggregate, ensuring uniform dispersion of inorganic particles at the nano level within the polymer matrix.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If inorganic particles are melt-mixed with polymer, then mechanical strength and dimensional stability are improved, but inorganic particles aggregate and uniform dispersion is difficult to achieve
Solution Approach 1:
The patent uses a surfactant as an intermediary substance to coat the inorganic particles before mixing with polymer. The surfactant acts as a mediator that reduces the cohesive force between inorganic particles and improves their compatibility with the polymer matrix, enabling uniform dispersion while maintaining mechanical strength improvements
Solution Approach 2:
The patent changes the surface properties of inorganic particles by controlling particle size reduction and applying surfactant treatment. These parameter changes modify the interfacial characteristics between inorganic particles and polymer, preventing aggregation and achieving stable uniform dispersion throughout the composite material
2Temperature
If particle diameter is decreased to nano level, then mechanical strength and heat deformation temperature are improved, but inorganic particles tend to aggregate due to increased mutual cohesive force
Solution Approach 1:
The surfactant serves as a protective intermediary layer around nano-sized inorganic particles, counteracting the increased cohesive forces that arise at the nano scale. This intermediary layer prevents particle aggregation while allowing the nano particles to maintain their high heat deformation temperature and mechanical strength properties
Solution Approach 2:
The patent extracts the harmful cohesive force effect by removing the direct particle-to-particle contact through surfactant coating. This separation prevents the aggregation tendency inherent in nano particles while preserving their beneficial thermal and mechanical properties in the composite material
3Strength
If conventional filler combining method is used, then mechanical properties are improved, but uniformity of filler distribution in polymer is not completely specified
Solution Approach 1:
The patent applies preliminary action by pre-coating inorganic particles with surfactant before mixing with polymer. This preliminary treatment ensures that particles are pre-equipped with dispersion-promoting properties, resulting in uniform filler distribution and consistent mechanical properties throughout the composite material
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
This approach results in a polymer composition with improved mechanical and thermal properties, as the inorganic particles are stably dispersed at the nano level, enhancing the composite's viscosity and elasticity, and preventing aggregation during processing.
Implementation Method 1
mixing of aqueous polymer dispersion with an aqueous colloidal solution of inorganic particles, followed by coagulation and drying to create a co-aggregate, ensuring uniform dispersion of inorganic particles at the nano level within the polymer matrix
Implementation Method 2
mixing of aqueous polymer dispersion with an aqueous colloidal solution of inorganic particles, followed by coagulation and drying to create a co-aggregate
Implementation Method 3
mixing of aqueous polymer dispersion with an aqueous colloidal solution of inorganic particles, followed by coagulation and drying to create a co-aggregate
Data Source
AI summary
A polymer composition is disclosed wherein inorganic particles are uniformly dispersed at the nano level in a polymer without having the inorganic particles being surface-treated. Further disclosed is a method for manufacturing a polymer composition wherein a co-aggregate which is obtained by uniformly mixing polymer dispersion with an inorganic particle colloidal solution and co-aggregating the polymer primary particles and inorganic particles which are heterogeneous particles, is separated from the solvent and dried so that the inorganic particles are uniformly dispersed at the nano level in the polymer.