Thermal, mechanical and electrical properties of polyurethane/(3-aminopropyl) triethoxysilane functionalized graphene/epoxy resin interpenetrating shape memory polymer composites

Zhang, Lixin; Jiao, Hongqian; Jiu, Hongfang; Chang, Jianlong; Zhang, Shaomei; Zhao, Yanan

doi:10.1016/j.compositesa.2016.07.017

Cited by 64 publications

(31 citation statements)

References 29 publications

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“…On the other hand, these enhancements in the thermal stability of SHWPU by the incorporation of rGO can be ascribed to different kinds of physicochemical interaction between the polymer and the nanofiller, such as van der Waals force and hydrogen bonding between residual oxygen‐containing groups on the rGO and SHWPU, leading to a restricted motion of SHWPU chains. Similar results can be found in the Zhang et al's work …”

Section: Methodssupporting

confidence: 92%

In Situ Reduction of Graphene Oxide in Waterborne Polyurethane Matrix and the Healing Behavior of Nanocomposites by Multiple Ways

Wan

Chen

2018

J Polym Sci B Polym Phys

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Smart polymers are advanced materials that continue to attract scientific community. In this work, self-healing waterborne polyurethane/reduced graphene oxide (SHWPU/ rGO) nanocomposites were prepared by in situ chemical reduction of graphene oxide in a waterborne polyurethane matrix. The chemical structure, morphology, thermal stability, mechanical property, and electrical conductivity of the SHWPU/rGO nanocomposites were characterized. The prepared SHWPU/rGO nanocomposites were further treated under heating, microwave radiating, and electrifying conditions to investigate their healing property. The results showed that chemical reduction of graphene oxide was achieved using hydrazine hydrate as a reducing agent and the rGO was well dispersed in the SHWPU matrix. The thermal stability and mechanical properties of SHWPU/rGO nanocomposites were significantly increased. The SHWPU/rGO nanocomposites can be healed via different methods including heating, microwave radiating, and electrifying.Inspired by the above studies, we proposed an in situ reduced way to fabricate reduced GO (rGO)/SHWPU nanocomposite. GO, which dispersed well in water, was first blended with SHWPU and then in situ reduced by hydrazine hydrate in the SHWPU matrix. The rGO was dispersed well in the SHWPU

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Section: Methodssupporting

confidence: 92%

In Situ Reduction of Graphene Oxide in Waterborne Polyurethane Matrix and the Healing Behavior of Nanocomposites by Multiple Ways

Wan

Chen

2018

J Polym Sci B Polym Phys

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“…We used an ingenious and ascendant curing process to prepare the coated MWCNTs/EP composites by using a silane coupling agent with amino group as the “hardener”; silane has one end that can react with the hydroxyl group on the surface of inorganic material to form a covalent bond, whereas its other end is covalently bonded to the EP resin. In our curing process, a part of the amino groups from the silane coupling agent was associated with the EP group of the EP resin; simultaneously, some other siloxane groups interacted with the hydroxyl on the surface of the modified carbon nanotube powder . As a result, the fillers were efficiently and tightly filled to the matrix resin during curing.…”

Section: Resultsmentioning

confidence: 99%

Preparation of high‐k composites with low dielectric loss based on the double‐layer coaxial structure of inorganic/polymer

Zhao

Luo

Tang

et al. 2018

J of Applied Polymer Sci

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This study presents a novel and simple modification of cladding multiwalled carbon nanotubes (MWCNTs) using organic polymer and inorganic nanoparticles to synthesize a product, which has a double-cladding coaxial structure and can be applied as filler in the dielectric field. The first layer of MWCNTs was coated with polyaniline (PANI) through the oxidation-reduction reaction mechanism using Ce(NH 4 ) 2 (NO 3 ) 6 as oxidizing agent and metal precursor of cerium oxide. Cerium ions on the second cladding layer of MWCNTs were directly deposited from the solution to the surface of the PANI layer forming the double-cladding hybrid (CeO 2 /PAN-I@MWCNTs). The external inorganic layer provides an insulating shell, which can prevent the contact between the conductive particles and hinder the migration of electrons between the MWCNTs. The intermediate layer of PANI provides the bonding between CeO 2 and the conductive core of MWCNTs, which also shows lower conductivity than carbon nanotubes. The CeO 2 /PANI@MWCNTs were compounded with epoxy (EP) resin and formed a dielectric material with the advantage of reducing dielectric loss while ensuring high dielectric constant. The dielectric constant of the coated MWCNTs/EP composites was 194.90 at 10 3 Hz with the content of fillers reaching 30 wt %, which is 28 times that of the pure EP. Accordingly, the dielectric loss of 30 wt % coated MWCNTs/EP composites was only 0.09 at 10 3 Hz, which is only 2.25 times that of the pure EP.

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“…If there were no other bonds created between the polymer matrix and the fibers, the elongation at break would increase. It could be explained that functional groups formed on the treated fiber surface are chemically cross‐linked to the pure PU isocyanate structure, resulting in higher resistance to deformation of the composite material . As a result, stress is more efficiently transferred from the matrix to the treated fiber, requiring greater stress to damage the material.…”

Section: Resultsmentioning

confidence: 99%

Mechanical properties of rigid polyurethane composites reinforced with surface treated ultrahigh molecular weight polyethylene fibers

Lian

et al. 2017

Polymers for Advanced Techs

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The mechanical properties of ultrahigh molecular weight polyethylene (UHMWPE) fibers reinforced rigid polyurethane (PU) composites were studied, and the effects of the fiber surface treatment and the mass fraction were discussed. Chromic acid was used to treat the UHMWPE fibers, and polyurethane composites were prepared with 0.1 to 0.6 wt% as-received and treated UHMWPE fibers. Attenuated total reflection Fourier transform infrared demonstrated that oxygen-containing functional groups were efficiently grafted to the fiber surface. The mechanical performance tests of the UHMWPE fibers/PU composites were conducted, and the results revealed that the treated UHMWPE fibers/PU composites had better tensile, compression, and bending properties than as-received UHMWPE fibers/PU composites. Thermal gravimetric analyzer showed that the thermal stability of the treated fiber composites were improved. The interface bonding of PU composites were investigated by scanning electron microscopy and dynamic mechanical analysis, and the results indicated that the surface modification of UHMWPE fiber could improve the interaction between fiber and PU, which played a positive role in mechanical properties of composites.

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Thermal, mechanical and electrical properties of polyurethane/(3-aminopropyl) triethoxysilane functionalized graphene/epoxy resin interpenetrating shape memory polymer composites

Cited by 64 publications

References 29 publications

In Situ Reduction of Graphene Oxide in Waterborne Polyurethane Matrix and the Healing Behavior of Nanocomposites by Multiple Ways

In Situ Reduction of Graphene Oxide in Waterborne Polyurethane Matrix and the Healing Behavior of Nanocomposites by Multiple Ways

Preparation of high‐k composites with low dielectric loss based on the double‐layer coaxial structure of inorganic/polymer

Mechanical properties of rigid polyurethane composites reinforced with surface treated ultrahigh molecular weight polyethylene fibers

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