Strong, Rebondable, Dynamic Cross-Linked Cellulose Nanocrystal Polymer Nanocomposite Adhesives

ACS Applied Materials & Interfaces
Elvis CudjoeStuart J Rowan

Abstract

A series of strong, rebondable polydisulfide nanocomposite adhesive films have been prepared via the oxidation of a thiol-endcapped semicrystalline oligomer with varying amounts of thiol-functionalized cellulose nanocrystals (CNC-SH). The nanocomposites are designed to have two temperature-sensitive components: (1) the melting of the semicrystalline phase at ca. 70 °C and (2) the inherent dynamic behavior of the disulfide bonds at ca. 150 °C. The utility of these adhesives was demonstrated on different bonding substrates (hydrophilic glass slides and metal), and their bonding at both 80 and 150 °C was examined. In all cases, stronger bonding was achieved at temperatures where the disulfide bonds are dynamic. For high surface energy substrates, such as hydrophilic glass or metal, the adhesive shear strength increases with CNC-SH content, with the 30 wt % CNC-SH composites exhibiting adhesive shear strengths of 50 and 23 MPa for hydrophilic glass and metal, respectively. The effects of contact pressure and time of bonding were also investigated. It was found that ca. 20-30 min bonding time was required to reach maximum adhesion, with adhesives containing higher wt % CNCs requiring longer bonding times. Furthermore, it was found t...Continue Reading

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Oct 6, 2016·Carbohydrate Polymers·Elvis CudjoeStuart J Rowan

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Citations

Feb 6, 2020·Journal of the American Chemical Society·Xiaolong SunEric V Anslyn
Jun 5, 2021·ACS Applied Materials & Interfaces·Katie M HerbertStuart J Rowan
Jun 9, 2021·Chemical Record : an Official Publication of the Chemical Society of Japan ... [et Al.]·Farzad SeidiHuining Xiao
Jul 30, 2021·The Journal of Physical Chemistry. B·Subarna SamantaAlexei P Sokolov
Oct 16, 2021·Science Advances·Md Anisur RahmanTomonori Saito

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