218 research outputs found
Approach for the on-line equipment for measuring variation in a turning size using laser
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A simulation method to analyze chemo-mechanical behavior of swelling-induced shape-memory polymer in response to solvent
No full textState diagram of phase transition temperatures and solvent‐induced recovery behavior of shape‐memory polymer
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Significantly improving electromagnetic performance of nanopaper and its shape-memory nanocomposite by aligned carbon nanotubes
No full textA new nanopaper that exhibits exciting electrical and electromagnetic performances is fabricated by incorporating magnetically aligned carbon nanotube (CNT) with carbon nanofibers (CNFs). Electromagnetic CNTs were blended with and aligned into the nanopaper using a magnetic field, to significantly improve the electrical and electromagnetic performances of nanopaper and its enabled shape-memory polymer (SMP) composite. The morphology and structure of the aligned CNT arrays in nanopaper were characterized with scanning electronic microscopy (SEM). A continuous and compact network of CNFs and aligned CNTs indicated that the nanopaper could have highly conductive properties. Furthermore, the electromagnetic interference (EMI) shielding efficiency of the SMP composites with different weight content of aligned CNT arrays was characterized. Finally, the aligned CNT arrays in nanopapers were employed to achieve the electrical actuation and accelerate the recovery speed of SMP composites. © 2012 SPIE
Synergistic effect of self-assembled carboxylic acid-functionalized carbon nanotubes and carbon fiber for improved electro-activated polymeric shape-memory nanocomposite
No full textThe present work studies the synergistic effect of self-assembled carboxylic acid-functionalized carbon nanotube (CNT) and carbon fiber on the electrical property and electro-activated recovery behavior of shape memory polymer (SMP) nanocomposites. The combination of CNT and carbon fiber results in improved electrical conductivity in the SMP nanocomposites. Carboxylic acid-functionalized CNTs are grafted onto the carbon fibers and then self-assembled by deposition to significantly enhance the reliability of the bonding between carbon fiber and SMP via van der Waals and covalent crosslink. Furthermore, the self-assembled carboxylic acid-functionalized CNTs and carbon fibers enable the SMP nanocomposites for Joule heating triggered shape recovery.Published versio
Research on the Damage Assessment of Carbon/Epoxy Composite Laminates at Different Impact Energy
No full textStudy On 3-D High Conductive Graphene Buckypaper For Electrical Actuation Of Shape Memory Polymer
No full textIn order to improve the through-thickness conductivity of few-layer graphene (FLG) in buckypaper, a unique synergistic effect of FLG and carbon nanofiber (CNF) was explored for the buckypaper enabled shape-memory polymer (SMP) composite. In the FLG/CNF buckypaper, FLGs were used to significantly improve the electrical conductivity in the basal plane, as well as CNFs were expected to bridge the gaps among FLGs and improve the through-thickness electrical conductivity. Therefore, an entangled and continuous network of FLG and CNF was expected to synergistically enhance electrical performance of buckypaper. Furthermore, the ratio between FLG and CNF in the bucky-paper was varied to characterize the efficiency for the electrical conductivity. Finally, the electrical actuation and optimization of temperature distribution of SMP composite have been experimentally testified by coating with the FLG/CNF buckypaper. Copyright © 2012 American Scientific Publishers All rights reserved
Fabrication And Electroactive Responsive Behavior Of Shape-Memory Nanocomposite Incorporated With Self-Assembled Multiwalled Carbon Nanotube Nanopaper
No full textA novel shape-memory nanocomposite that exhibits electrical actuation capabilities was fabricated by incorporating a conductive multiwalled carbon nanotube (MWCNT) nanopaper into shape-memory polymer matrix. The self-assembled MWCNT nanopaper was made on hydrophilic polycarbonate membrane. This process was based on well-defined dispersion of the nanosized individual MWCNT and controlled traditional pressure vacuum deposition procedure. The self-assembled MWCNTs in the nanopaper provided a percolating conductive network with a large interfacial area. It not only offered a high electrical conductivity but also simultaneously enhanced recovery speed by electrically resistive heating, with increasing the content of MWCNT nanopaper in nanocomposite. © 2011 John Wiley & Sons, Ltd
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