Near-infrared (NIR) disrelation mapping analysis for poly(lactic) acid nanocomposite.

Area of Science:

• Materials Science
• Polymer Science
• Nanotechnology

Background:

• Poly(lactic) acid) (PLA) is a biodegradable polymer with potential applications in various fields.
• Nanocomposites offer enhanced properties compared to neat polymers.
• Understanding the interaction between polymer matrices and nanofillers is crucial for material design.

Purpose of the Study:

• To investigate the interaction between poly(lactic) acid) (PLA) matrix and montmorillonite-based nanoclay in nanocomposites.
• To visualize the spatial distribution of crystalline and amorphous components within the PLA nanocomposite.
• To elucidate the role of nanoclay as a nucleating agent in PLA crystallization.

Main Methods:

• Analysis of near-infrared (NIR) imaging data using disrelation mapping.
• Application of a two-dimensional (2D) correlation function as a spatial filter.
• Construction of disrelation maps based on NIR bands from crystalline and amorphous PLA components.

Main Results:

• Disrelation mapping successfully identified areas of interaction between the PLA matrix and nanoclay.
• Distinct distribution patterns of crystalline and amorphous PLA components were observed.
• Increased disrelation intensity near the nanoclay indicated its role in promoting PLA crystallization.

Conclusions:

• Disrelation mapping is an effective technique for analyzing polymer-nanocomposite interactions.
• Montmorillonite-based nanoclay acts as a nucleating agent, enhancing the crystalline structure of PLA.
• The findings provide insights into the structure-property relationships of PLA nanocomposites.