Improving thermal conductivity of polyethylene/polypropylene by styrene-ethylene-propylene-styrene wrapping hexagonal boron nitride at the phase interface

Abstract

In this work, the polyethylene (PE) and polypropylene (PP) percentage is controlled at 50:50 to make the composite form a co-continuous structure; the hexagonal boron nitride (h-BN) is wrapped by thermoplastic elastomer styrene-ethylene-propylene-styrene (SEPS). This approach enables the localized distribution of h-BN at the interface of the co-continuous structure of PE/PP/SEPS/h-BN composite material, allowing the construction of a heat conduction path, thereby improving the thermal conductivity of PE/PP. Theoretical calculation predicted the localized distribution of SEPS at the interface of the PE/PP composite co-continuous structure. 2The thermal conductivity of the composites can be improved by 57.7% by adding 10 wt% h-BN, presenting a commercial potential of such composites in heat dissipation applications.

Toward Balanced Piezoelectric and Mechanical Performance: 3D Printed Polyvinylidene Fluoride/Carbon Nanotube Energy Harvester with Hierarchical Structure

“…has become a particularly important issue . It is worth noting that piezoelectric polymer materials featuring flexibility, processability, , and capability to convert mechanical energy in the environment into electricity is now drawing great attention in both the academic and industrial fields. , Piezoelectric polymeric materials feature an impressive nature to convert mechanical energy into electricity and offer promising application potential in future electronics, such as additional power source for portable electronics or self-powered sensors. , Nevertheless, most of the existing piezoelectric polymer materials are two-dimensional thin films, which cannot effectively utilize the strain concentration in the normal direction required by piezoelectric devices, and simultaneously, these films do not easily act as a structural material to bear stress in practical application environments . Therefore, great effort has been dedicated to develop the design and to fabricate three-dimensional polymer piezoelectric materials and devices …”

“…has become a particularly important issue. 1 It is worth noting that piezoelectric polymer materials featuring flexibility, 6 processability, 7,8 and capability to convert mechanical energy in the environment into electricity 9 is now drawing great attention in both the academic and industrial fields. 10,11 Piezoelectric polymeric materials feature an impressive nature to convert mechanical energy into electricity and offer promising application potential in future electronics, such as additional power source for portable electronics or self-powered sensors.…”

Bioinspired Nanoheterogeneous Alternating Multiarched Architecture: Toward a Superior Strength–Toughness Integration

“…Thus, using inorganic synthesis methods to break through it, such as physical vapor deposition (PVD) technology which is mature for the preparation of hard ceramic coatings, is expected. Researchers have designed material structures composed of nanowires , and heterogeneous composites , in order to improve the thermal conductivity. Therefore, the design ideas for the coating can be referenced from the literature.…”

Thermal Conductivity and Phase Change Properties of Boron Nitride-Lead Oxide Nanoparticles doped Polymer Nanocomposites

“…Increasing the thermal conductivity is achieved by adding PCMs to enlarged graphite and porous support materials with high thermal conductivity [1][2][3] and placing thermal conductivity-improving fillers as carbon nanotubes [4], graphene nanomaterials [5,6], activated carbon [7], carbon fiber, and metallic/oxide nanoparticles [8][9][10] into the PCMs. It has been supported by several studies that the latter of these assumptions is more effective in increasing the λ value of PCM and therefore promising.…”

“…Various thermal conductive fillers such as carbon-based [1][2][3], ceramic [4,5], and metallic fillers [7,8] have been used to improve the thermal conductivity such as carbon-based fillers [1][2][3]. In particular, BN is a universally accepted ceramic filler, especially for thermally conductive composites, due to its thermal conductivity and electrical insulator [9][10][11]. These properties are fascinating for thermal interface materials [19,20].…”