Journal
MACROMOLECULES
Volume 50, Issue 4, Pages 1422-1429Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.macromol.6b02694
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Funding
- National Natural Science Foundation of China [51673053, 51273050]
- Key Technologies R & D Program of Heilongjiang Province [GA14A101]
- Fundamental Research Funds for the Central Universities [HIT. IBRSEM. 2013016]
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A direct and nondestructive strategy for growing polymers from the surface of graphene is demonstrated. The technique involves the covalent attachment of an initiator via one-step cycloaddition of a diarylcarbene, followed by the polymerization of 2-hydroxyethyl methacrylate (HEMA) using atom transfer radical polymerization (ATRP). The functionalization strategy is shown to significantly increase the solubility of the resulting materials (PHEMA-G) and leave the structure of the graphene largely intact. Importantly, the PHEMA-G/poly(p-phenylene benzobisoxazole) (PBO) composite fibers could be obtained by a one-pot polymerization and dry-jet wet spinning process. The nanocomposite fibers exhibited a tensile strength of 3.22 GPa (51.2% higher than PBO) and Young's modulus of 139.3 GPa (33.7% higher than PBO) at very low PHEMA-G loading (1.0 wt %). This represents an excellent reinforcing efficiency, better than other reports of the graphene/PBO fibers system, and indicates that this material is suitable for applications in composite science.
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