Nanocomposite Plastic Production via PVD Granule Coating
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The production of nanocomposite plastic materials is hindered by the tendency of nanoparticles to form agglomerates, requiring costly and complex processing steps, and their high toxicity limits their application, especially in thermoplastic polymers where efficient filler-compatibilizer-polymer systems are difficult to achieve.
Innovation Solution
A method involving coating thermoplastic polymer granules with a nanometric layer using PVD sputtering, followed by injection moulding to achieve efficient dispersion of nanoparticles directly in the polymer matrix, eliminating the need for nanoparticle production and ensuring nano-heterogeneity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If nanoparticles are introduced directly into the polymer matrix, then the structural and functional performances are improved, but the nanoparticles form agglomerates that become difficult to separate
Solution Approach 1:
The patent applies preliminary action by coating the polymer granules with the nanofiller material before the injection molding process. This pre-coating ensures that the nanofiller is already distributed on the granule surfaces, preventing agglomeration during mixing and enabling direct introduction into the polymer matrix without requiring separate nanoparticle production and purification steps.
2Strength
If a step of producing nanoparticles is included, then the nanocomposite properties are improved, but the general cost of production increases and productivity decreases
Solution Approach 1:
The patent merges the nanofiller coating step with the standard injection molding process by coating polymer granules before molding. This integration eliminates the need for separate nanoparticle production facilities and multiple processing steps, thereby maintaining nanocomposite properties while significantly improving productivity and reducing production costs.
3Strength
If nanoparticles are used to improve mechanical properties, then the elastic modulus and breaking strength are improved, but the toxicity concerns increase
Solution Approach 1:
The patent uses polymer granules as an intermediary carrier for the nanofiller material. The nanofiller is coated onto the granule surfaces, which act as a safe handling medium. This approach allows the nanofiller to be processed and introduced into the polymer matrix in a controlled manner, reducing direct handling of loose nanoparticles and mitigating toxicity concerns while maintaining mechanical property improvements.
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 method enhances productivity and safety by directly dispersing nanoparticles in the polymer matrix during injection moulding, improving mechanical and antibacterial properties while reducing costs and toxicity concerns.
Implementation Method 1
a coating step, in which the thermoplastic polymer granules with sizes from 0.5 to 5 mm are coated using a PVD sputtering technique with a coating layer from 1 to 100 nm
Implementation Method 2
an injection moulding step, in which the thermoplastic polymer granules coated in said coating step are plasticized and injected at high pressure into a closed mould
Data Source
Figure 1
Figure 2a~2b
AI summary
A method for the preparation of nanocomposite plastic materials comprising: - a coating step, in which the thermoplastic polymer granules with sizes from 0.5 to 5 mm are coated using a PVD sputtering technique with a coating layer from 1 to 100 nm of a material to be dispersed in a matrix of said thermoplastic polymer; an injection moulding step, in which the thermoplastic polymer granules coated in said coating step are plasticized and injected at high pressure into a closed mould.