More functional groups on the nanocarbon surface means more bonding sites with the polymer matrix — stronger interface, better load transfer, and more reinforcement per gram. Flexiphene™ achieves up to 10× higher interfacial activity than standard oxidized CNTs without the structural damage that acid functionalization inflicts.
The goal of surface functionalization is to create bonding sites on the nanocarbon surface that can interact with the polymer matrix — improving adhesion and load transfer. But the conventional way to add functional groups (acid oxidation) simultaneously destroys the structural integrity that makes the reinforcement valuable in the first place.
The planar nanocarbon component carries oxygen-containing functional groups distributed across its entire surface — not just at defect sites. This means the functional group density per unit surface area is dramatically higher than for acid-functionalized CNTs.
In the Flexiphene™ nanocarbon architecture, carbon nanotubes provide structural reinforcement — high aspect ratio, intact sp² lattice, tensile strength — while the nanocarbon component handles chemistry. Division of function enables each component to do what it does best.
The combined Flexiphene™ architecture achieves up to 10× higher interfacial activity compared to standard oxidized CNTs. This translates directly to stronger nanocarbon-polymer adhesion and more effective stress transfer under mechanical loading.
Higher interfacial activity means each gram of Flexiphene™ does more work. You don't need 5 wt.% of mediocre, acid-damaged CNTs — 1 wt.% of well-dispersed, high-functional-content Flexiphene™ delivers measurably better results.
| Property | Standard Oxidized CNTs (5+ wt.%) | Flexiphene™ (1 wt.%) | Result |
|---|---|---|---|
| Interfacial Activity | Baseline | Up to 10× higher | More bonding sites |
| Tensile Strength (PA 66) | Marginal / variable | +19.0% | ASTM measured |
| Flexural Modulus (PA 66) | Marginal / variable | +18.9% | ASTM D790 |
| Loading Required | 3–10 wt.% typical | 1 wt.% | Lower cost |
| Structural Damage | Significant | None | Full performance |
Mechanical: ASTM Type V tensile / ASTM D790 flexural, PA 66 at 1 wt.% Flexiphene™.
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