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Palmitoylated cellulose nanocrystal/polycarbonate composite with high mechanical performance and good transparency |
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| Authors: | Zhongyuan Xie Xingjuan Wang Zhangyun Chen Hua Jiang |
| Affiliation: | 1. College of Chemical Engineering, Nanjing Forestry University, Nanjing, China
Contribution: Data curation (lead), ?Investigation (lead), Writing - original draft (lead);2. College of Chemical Engineering, Nanjing Forestry University, Nanjing, China Contribution: Methodology (supporting), Software (supporting);3. College of Chemical Engineering, Nanjing Forestry University, Nanjing, China Contribution: Software (supporting);4. College of Chemical Engineering, Nanjing Forestry University, Nanjing, China |
| Abstract: | To fabricate polycarbonate (PC) composites with high mechanical and optical properties, PC composite films reinforced by cellulose nanocrystals esterified using palmitoyl chloride (palmitoylated cellulose nanocrystal PAL-CNCs]) were fabricated by casting-evaporation and characterized by several techniques. It was shown that the PAL-CNCs with a substitution degree of 0.43 and the crystalline index of 53.3% were better dispersed in chloroform and tetrahydrofuran, and achieved a water contact angle of 81.0°. The crystallite size and crystalline index of the PC in the composite film significantly increased to more than 5.2 nm and 51.5%, respectively, after the incorporation of the PAL-CNCs. The PC composite film had an increase of 91.4% in tensile strength, 84.1% in Young's modulus, and a decrease of 5% in impact strength. Meanwhile, its UV–Vis-light transmittance was above 90%. Therefore, the palmitoylated -CNCs were a better candidate for engineering PC composites with high mechanical performance and transparency. |
| Keywords: | cellulose nanocrystal nanocomposite film palmitoylation polycarbonate reinforcement |