Investigation of dielectric and thermal conductive properties of epoxy resins modified by core-shell structured PS@SiO 2

Zhou, Jun; Jiang, Yingye; Wu, Gaoqing; Wu, Weijian; Wang, Yang; Wu, Kai; Cheng, Yonghong

doi:10.1016/j.compositesa.2017.03.005

Cited by 24 publications

(14 citation statements)

References 20 publications

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“…GNPs were used without any further treatment or functionalization. The chosen hybrid of EG and commercial GNPs was dispersed in an industrial epoxy resin containing a reactive diluent [11,[36][37][38][39][40][41][42][43]. We claim that the choice of high aspect ratio hybrid fillers up to optimum filler loading is an important parameter to move toward adhesive composite with high thermal conductivity and a further increase in thermal conductivity of epoxy by increasing the total hybrid micro-nano-filler loading is hard to realize due to the increased filler aggregation and interfacial thermal resistance as well as dramatically increased viscosity.…”

Section: Introductionmentioning

confidence: 99%

Study on epoxy resin-based thermal adhesive filled with hybrid expanded graphite and graphene nanoplatelet

2019

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Reinforced epoxy composite adhesives of expanded graphite (EG) and graphene nanoplatelet (GNPs) were prepared by hand layup and mechanical mixing method. Disk-shaped epoxy composite samples with EG and GNP mixtures in varying ratios were prepared to measure the thermal conductivity (TC) enhancement. Thermal characterization testing data showed high thermal conductivity enhancement with three different hybrid filler concentrations of 10, 25, and 35 wt%, respectively. The highest thermal conductivity of 3.6 W/m K was obtained for an epoxy adhesive composite having 30 wt.% EG and 5 wt.% GNP which was tested by guarded heat flow meter technique. This significant improvement in thermal conductivity can be attributed to the lowering of overall thermal interface resistance due to small amounts of nanofiller (GNP) improving the thermal contact between the primary microfillers (graphite). The synergistic effect of this hybrid filler system is lost at higher loadings of the GNP relative to expanded graphite. The structure of the graphite flake, GNP/epoxy, EG/epoxy and hybrid EG/GNP/epoxy composites was investigated by XRD. The EG prepared by acid intercalation and abrupt thermal expansion showed good compatibility with GNP and the epoxy resin. From scanning electron microscopy photographs, the formation of conducting network observed through the expanded graphite and GNPs in a low conducting epoxy matrix. The thermal decomposition temperature of the composite increased to 450 and 615 °C with the addition of 10 and 35 wt% of hybrid EG/GNP inside epoxy matrix, respectively. LAP shear strength of single and hybrid filled epoxy adhesive decreased at 35 wt.% loading than neat epoxy.

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Section: Introductionmentioning

confidence: 99%

Study on epoxy resin-based thermal adhesive filled with hybrid expanded graphite and graphene nanoplatelet

2019

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“…Cellulose nanocrystals in combination with polymers owing to their renewable nature and wide variety applications in material science has been attracted an increasing interest of researchers due to their enhanced performances [19][20][21][22]. New methods have been introduced to enhance the performance of CNCs [23][24][25]. Cellulose nanocrystals obtained from natural bio resources are the building blocks to design new biomaterials in nanotechnology [26,27].…”

Section: Introductionmentioning

confidence: 99%

Enhancement in Adhesive and Thermal Properties of Bio‐based Epoxy Resin by Using Eugenol Grafted Cellulose Nanocrystals

Aziz

Zheng

Jamil

et al. 2021

J Inorg Organomet Polym

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Bio-based epoxy resins are being used due to their green chemistry. They have better properties than petroleum-based epoxy resins. Recently, environment friendly nanomaterials have been used for different industrial applications. Cellulose nanocrystals (CNCs) are among the best naturally occurring materials.Therefore, the surface of cellulose nanocrystals are modi ed by eugenol-based silane coupling agent (EBSCA). Chemical composition and surface morphologies of CNCs were analyzed and characterized by FTIR, AFM, SEM, TEM and 1 H-NMR. The SEM and AFM results con rmed eugenol-based silane coupling agent was successfully grafted on cellulose nanocrystals. Modi ed CNCs demonstrated an excellent tensile strength (2190 MPa) and modulus (16.00 MPa), as well as storage modulus (1622 MPa) exhibited by 1wt% modi ed cellulose nanocrystals composites. Additionally, modi ed CNCs displayed hydrophobic behavior (CA=102 ± 2°). The corresponding modi ed CNCs have signi cant applications in combination of high stiffness and strength to the epoxy resins. This study lays a foundation towards full bio-based, environment friendly polymers fabrication and consumptions most desirable in adhesive and mechanical industrial elds.

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“…Surface modification of fillers or crystals having coreshell structures in polymers can greatly enhance the performances such as electrical and thermal conductivity. Much efforts has been carried out to develop new insulating materials and related fabrication method for enhancing performance [27,28].…”

Section: Introductionmentioning

confidence: 99%

Improving Adhesive Properties of Cellulose Nanocrystals Modifying By 3-Glycidoxypropyltrimethoxy Silane (KH-560) Coupling Agents

Aziz¹,

Iqbal

Ullah

et al. 2021

BJSTR

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Cellulose nanocrystals (CNCs) is one of the outstanding nanomaterial. So far, much researcher nowadays has been developed their properties. These properties make CNCs a promising resource to replace fossil resources for the production of industrial materials and chemicals. Here, we firstly modified cellulose nanocrystals with 3-Glycidoxypropyltrimethoxy (KH-560) silane coupling agent. Chemical composition and surface morphologies of cellulose nanocrystals were analyzed and characterized by FT-IR, and SEM. The result indicated that polar hydroxyl groups were successfully introduced on the cellulose nanocrystals surface. The SEM results confirmed silane coupling agent was successfully grafted on cellulose nanocrystals. Modified CNCs demonstrated an excellent tensile strength and modulus exhibited by 1wt% modified cellulose nanocrystals composites. This novel procedure improves the dispersion of cellulose nanocrystals by modification and at the same time enhance the interfacial adhesion. Result shows increases more over than the native cellulose nanocrystals by modifying CNCs with KH-560 coupling agent. This study lays a foundation towards full polymers fabrication and consumptions most desirable in adhesive and mechanical industrial fields.

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Investigation of dielectric and thermal conductive properties of epoxy resins modified by core-shell structured PS@SiO 2

Cited by 24 publications

References 20 publications

Study on epoxy resin-based thermal adhesive filled with hybrid expanded graphite and graphene nanoplatelet

Study on epoxy resin-based thermal adhesive filled with hybrid expanded graphite and graphene nanoplatelet

Enhancement in Adhesive and Thermal Properties of Bio‐based Epoxy Resin by Using Eugenol Grafted Cellulose Nanocrystals

Improving Adhesive Properties of Cellulose Nanocrystals Modifying By 3-Glycidoxypropyltrimethoxy Silane (KH-560) Coupling Agents

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