<i>50th Anniversary Perspective</i>: Are Polymer Nanocomposites Practical for Applications?

TLDR

Polymer nanocomposites have been a central research focus for decades, with foundational studies highlighting the physics and chemistry of nanofiller inclusion and early work suggesting a potential revolution in plastics. This Perspective reviews four case studies—filled rubbers, fiber‑reinforced thermosets, gas‑separation membranes, and dielectric capacitors—to assess synthetic advances, successes, and remaining bottlenecks for practical application. The authors analyze synthetic developments and application outcomes in each case, noting successes and identifying technological challenges that must be addressed. Over 25 years, polymer nanocomposites have delivered many niche solutions.

Abstract

The field of polymer nanocomposites has been at the forefront of research in the polymer community for the past few decades. Foundational work published in Macromolecules during this time has emphasized the physics and chemistry of the inclusion of nanofillers; remarkable early developments suggested that these materials would create a revolution in the plastics industry. After 25 years of innovative and groundbreaking research, PNCs have enabled many niche solutions. To complement the extensive literature currently available, we focus this Perspective on four case studies of PNCs applications: (i) filled rubbers, (ii) continuous fiber reinforced thermoset composites, (iii) membranes for gas separations, and (iv) dielectrics for capacitors and insulation. After presenting synthetic developments we discuss the application of polymer nanocomposites to each of these topic areas; successes will be noted, and we will finish each section by highlighting the various technological bottlenecks that need to be overcome to take these materials to full-scale practical application. By considering past successes and failures, we will emphasize the critical fundamental science needed to further expand the practical relevance of these materials.