Puncture Healing Polymer Blend via Local Melt State
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Solution Overview
Problem
Existing self-healing materials suffer from slow healing rates, detrimental effects on composite fiber performance due to foreign inserts, and inadequate load-bearing strength, especially under ballistic or hyper-velocity impacts.
Innovation Solution
A puncture healing polymer blend comprising a self-healing polymer with sufficient melt elasticity and a non-self-healing polymer, blended and heated to a temperature above their individual melt temperatures, allowing rapid self-healing without the need for foreign inserts or microcapsules, utilizing polymers like Surlyn and Affinity EG8200G with optional chopped fibers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If thermal or solvent processes are used for crack repair in polymers, then self-healing capability is achieved, but the healing rate is slow
Solution Approach 1:
The invention changes the physical state parameter of the polymer from solid to local melt state through high-velocity impact, enabling rapid self-healing. The projectile velocity is specifically designed to produce a local melt state without melting the entire material, allowing fast crack closure through viscous flow and rapid solidification upon cooling.
2Reliability
If foreign inserts or microcapsules are added to polymer matrix for self-healing, then healing agent delivery is enabled, but composite fiber performance deteriorates
Solution Approach 1:
The invention extracts and eliminates the need for foreign inserts, microcapsules, and other additives from the polymer matrix. Instead, it relies on the inherent properties of the polymer material itself - specifically, its ability to undergo local melting and rapid solidification - to achieve self-healing, thereby maintaining composite fiber performance.
3Strength
If high temperature and prolonged contact time are applied for material fusion, then bonding strength is improved, but processing time and energy consumption increase
Solution Approach 1:
The invention performs preliminary action by creating a local melt state through the kinetic energy of the projectile itself, rather than requiring external heating. The high-velocity impact pre-heats and melts the polymer locally at the impact site, enabling immediate self-healing without prolonged external heating or pressure application.
4Reliability
If conventional self-healing materials are used, then damage mitigation is achieved, but load-bearing strength under ballistic impact is insufficient
Solution Approach 1:
The invention changes the operational parameter from low-velocity, low-stress conditions to high-velocity ballistic impact conditions. The polymer is designed to undergo local melting at the high temperatures and stresses generated by ballistic impact, enabling self-healing that maintains load-bearing strength even under extreme impact conditions.
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 blend achieves rapid self-healing over a wider temperature range, enhancing damage tolerance and structural durability, with improved mechanical properties and faster healing rates, suitable for applications in aerospace and pressure-loaded structures.
Implementation Method 1
The first polymer material may have sufficient melt elasticity to snap back and close a hole formed by a projectile passing through the material at a velocity sufficient to produce a local melt state in the first polymer material
Implementation Method 2
produce a local melt state in the first polymer material
Data Source
AI summary
One aspect of the present invention is a puncture healing polymer blend comprising a self-healing first polymer material having sufficient melt elasticity to snap back and close a hole formed by a projectile passing through the material at a velocity sufficient to produce a local melt state in the first polymer material. The puncture healing polymer blend further includes a non-self-healing second material that is blended with the first polymer material. The blend of self-healing first polymer material and second material is capable of self-healing, and may have improved material properties relative to known self-healing polymers.