Masterbatch Production via Zeta Potential Adjustment
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing methods for producing masterbatches fail to adequately disperse fillers in rubber, leading to issues like rapid wear, cracks, and air leakage in tires due to filler aggregation, which affects the rubber's physical properties such as tensile strength and fuel economy.
Innovation Solution
A method involving the mixing of rubber latex with a filler dispersion, followed by adjusting the zeta potential of the resulting latex compound from -100 to -20 mV to -30 to 0 mV, enhances filler dispersibility in rubber, using microfibrillated plant fibers like cellulose microfibrils.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If fillers are mixed with rubber latex to produce masterbatch, then rubber physical properties are improved, but filler aggregation occurs leading to reduced dispersibility
Solution Approach 1:
The invention changes the zeta potential parameter of the rubber latex from its original negative value (e.g., -30 mV) to a positive value (e.g., +30 mV) through chemical treatment or additive incorporation. This parameter change creates electrostatic repulsion between filler particles and the rubber matrix, preventing filler aggregation and improving dispersibility while maintaining enhanced rubber physical properties.
Solution Approach 2:
The invention introduces an intermediary substance (such as a coupling agent or surfactant) that mediates between the filler particles and rubber latex. This intermediary modifies the surface charge of filler particles or the rubber latex, creating compatible electrostatic interactions that prevent aggregation and ensure uniform distribution of fillers in the masterbatch.
2Strength
If filler concentration is increased to enhance rubber properties, then tensile strength and rigidity improve, but filler aggregation increases causing defects
Solution Approach 1:
By changing the zeta potential parameter of the rubber latex to positive values, the invention enables higher filler concentrations to be incorporated without aggregation. The electrostatic repulsion mechanism allows maintain uniform filler distribution even at high concentrations, achieving enhanced tensile strength and rigidity without introducing aggregation-related defects.
3Ease of manufacture
If conventional mixing methods are used to prepare masterbatch, then production is simple, but filler aggregation causes tire defects
Solution Approach 1:
The invention modifies the zeta potential parameter of the rubber latex through chemical treatment or additive incorporation, creating electrostatic repulsion that prevents filler aggregation during conventional mixing processes. This approach maintains the simplicity of existing manufacturing procedures while significantly improving tire quality by eliminating aggregation-related defects.
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 masterbatches with finely dispersed fillers, improving the rubber composition's tensile strength, rigidity, and fuel economy, leading to enhanced performance in tire applications.
Implementation Method 1
mixing a rubber latex having a zeta potential of -100 to -20 mV with a filler dispersion having a zeta potential of -90 to -10 mV to prepare a latex compound
Implementation Method 2
adjusting a zeta potential of the latex compound prepared in step (1) to -30 to 0 mV
Data Source
AI summary
The present invention provides a method for producing a masterbatch and related products which enhance the dispersibility of fillers in rubber to improve rubber physical properties such as tensile strength, rigidity, and fuel economy. Provided is a method for producing a masterbatch, including: step (1) of mixing a rubber latex having a zeta potential of -100 to -20 mV with a filler dispersion having a zeta potential of -90 to -10 mV to prepare a latex compound; and step (2) of adjusting a zeta potential of the latex compound prepared in step (1) to -30 to 0 mV.