Polymer Nanocomposites for Emulsion‐Based Coatings and Adhesives

Abstract

Emulsion‐based coatings and adhesives are in growing demand due to an increased awareness of health and safety issues arising from solvent‐based polymer manufacturing processes. However, emulsion‐based techniques often require additional development to achieve equal or better application performance compared to solvent‐based processes. The inclusion of nanoparticles in emulsion‐based coatings and adhesives can be considered as a promising means to enhance performance. This paper reviews the current progress on the synthesis of emulsion‐based nanocomposites for coating and adhesive applications and addresses the principles and techniques for nanoparticle dispersions and their inclusion into polymer latexes. The effects of nanoparticle shape and size on the enhancement of nanocomposite properties are also highlighted. Among the reinforcing nanoparticles such as nanoclays, carbon nanotubes, and cellulose nanocrystals (CNCs), CNCs are promising due to their abundance, nontoxicity, and accessible surface hydroxyl groups, which facilitate their compatibility with polymer latexes via physical and chemical treatments.

A sequential design approach for in situ incorporation of cellulose nanocrystals in emulsion-based pressure sensitive adhesives

“…counterion on the sulfate half ester group) the CNCs are readily dispersible in water (Beck et al 2012) and can be used in a straightforward manner as modifiers for water-based polymerization methods such as emulsion polymerization. Exploiting the combination of bio-sourced nanomaterials and green production methods has been of particular interest in the production of coatings (Kluge et al 2017) and pressure sensitive adhesives (PSAs) (Dastjerdi et al 2019).…”

Sustainable polymer reaction engineering: Are we there yet?

“…The third route is to use natural polymers (eg, cellulose, [ 100–105 ] chitosan, [ 106–109 ] starch, [ 68,110–113 ] lignin [ 69,114–117 ] ) to develop materials. Usually, chemical or physical modification of the natural polymers is required.…”

“…[181] Recent attempts to use cellulose nanocrystals in emulsion formulations for pressure sensitive adhesives successfully overcame latex instability issues caused by the negative charge of the cellulose nanocrystal surfaces. [103,104] It was demonstrated that the introduction of the cellulose F I G U R E 8 Towards the production of starch-based latexes nanocrystals greatly improved adhesive properties of the latex films.…”

The influence of the polymerization approach on the catalytic performance of novel porous poly (ionic liquid)s for green synthesis of pharmaceutical spiro-4-thiazolidinones

“…Radical-initiated polymerization processes, including dispersion, suspension, and emulsion polymerization, are traditional protocols for the construction of synthetic polymers owing to the polymer materials separation and ease of heat removal. [14][15][16] In these heterogeneous polymerizations, polymeric surfactants or emulsiers are used to stabilize the latex particles or monomer droplets. In recent decades, the precipitation polymerization has developed and in which any added surfactant or stabilizer is absent compared to traditional polymerization protocols.…”