Article
Chemistry, Physical
Qinwei An, Wenqi Xiong, Feng Hu, Yikang Yu, Pengfei Lv, Siqi Hu, Xuetao Gan, Xiaobo He, Jianlin Zhao, Shengjun Yuan
Summary: We have successfully grown high-quality WS2 and WSe2 nanotubes on Si substrates using catalytic chemical vapour deposition with Au nanoparticles. The Au nanoparticles act as nucleation sites for the growth of WS2 or WSe2 shells, which subsequently seed the growth of nanotubes. We find that the growth mode of nanotubes is sensitive to temperature and have achieved around 79% WS2 nanotubes with single chiral angles, primarily at 30 degrees (approximately 37%) and 0 degrees (approximately 12%). Furthermore, we demonstrate the tunability of geometric, electronic, and optical properties of WS2 nanotubes through their chirality.
Article
Chemistry, Multidisciplinary
Qi Qin, Jing Chen, Changze Wu, Yixue Wang, Yunan Li, Meng Song
Summary: Novel carbon nanostructures, carbon nanobuds and nanoballs, have been successfully synthesized on the surface of graphene using the electrochemical method. Under a certain potential, carbon nanobuds are grown in situ on the surface of graphene, and with the increase of potential, these nanobuds grow into nanoballs and exfoliate from the graphene surface. Graphene undergoes oxidation at higher potentials, resulting in the formation of graphene oxide fragments.
Article
Polymer Science
Zhuyi Gao, Qunfeng Dong, Mengyao Shang, Baoqing Shentu, Chinan Wu
Summary: This study investigated the effects of CNTs/GNPs hybrid fillers on the properties of PBT/PET composites prepared by melt blending process. The hybrid fillers were found to enhance mechanical properties and thermal conductivity, as well as improve electrical conductivity and EMI SE. Absorption loss was identified as the main mechanism for the attenuation of incident electromagnetic waves in the hybrid composites.
JOURNAL OF APPLIED POLYMER SCIENCE
(2022)
Article
Polymer Science
Shuai Zhang, Hongyi Sun, Tiange Lan, Xiaobo Liu, Qichao Ran
Summary: A series of polybenzoxazine/graphene composite foams with high EMI shielding effectiveness have been developed using a simple sol-gel method. Increasing graphene loading can reduce the density, form an electrically conductive path, and significantly enhance the electric conductivity and EMI SE of the composite foams. The EMI shielding is primarily achieved through absorption attenuation, with the composite foam showing absorption ratio higher than 98% in a specific frequency range due to multiple internal reflection and absorption.
JOURNAL OF APPLIED POLYMER SCIENCE
(2021)
Article
Polymer Science
Xiaoling Luo, Dirk W. Schubert
Summary: This study fabricated PMMA/GNPs conductive composite films with different morphologies using four fabrication techniques and systematically investigated the morphologies of dispersed GNPs and their electrical properties in both in-plane and perpendicular direction. The percolation thresholds and conductivities of the composites varied significantly with different fabrication techniques, and the differences were explained in terms of GNPs size, orientation, distribution, and dispersion state.
JOURNAL OF APPLIED POLYMER SCIENCE
(2021)
Article
Polymer Science
Marcel Andrey de Goes, Luciano Allan Woicichowski, Renan Vinicius Viera da Rosa, Joao Paulo Ferreira Santos, Benjamim de Melo Carvalho
Summary: The dispersion of fillers in the PVDF matrix can be improved by applying a sequence of extensional flows. Extensional flows significantly enhance the viscosity and relaxation of MWCNT nanocomposites, while having marginal effects on MMT nanocomposites. The addition of MMT in PVDF promotes the crystallization of a specific phase and extensional flows enhance its crystallinity content.
JOURNAL OF APPLIED POLYMER SCIENCE
(2021)
Article
Polymer Science
Saoussen Gammoudi, Denis Rodrigue, Frej Mighri
Summary: The study found that the addition of multiwall carbon nanotubes in a co-continuous immiscible polymer blend can significantly decrease electrical resistivity through oscillatory shearing, but can also increase resistivity under large deformation due to the destruction of MWCNT paths.
JOURNAL OF APPLIED POLYMER SCIENCE
(2021)
Article
Polymer Science
T. R. Aswathy, Biswaranjan Dash, Pranab Dey, Sujith Nair, Kinsuk Naskar
Summary: This study investigates the effect of hybrid nanofillers on bromobutyl rubber/epoxidized natural rubber composites for developing highly air-impermeable nanocomposites. The addition of graphene oxide, nanoclay, and nanosilica enhances the dispersion of graphene nanoplatelets in the composites, resulting in improved air barrier properties. The study demonstrates that hybrid nanofillers can enhance the mechanical, barrier, and dynamic properties of the composites compared to those filled with individual graphene nanoplatelets.
JOURNAL OF APPLIED POLYMER SCIENCE
(2021)
Article
Polymer Science
Yi Zhou, Connor Myant, Rebecca Stewart
Summary: Sensors based on electronic textiles have become increasingly prominent in the field of biomechanical monitoring technology. This paper proposes a graphene/fabric composite sensor with good sensitivity and stretchability for human motion monitoring.
JOURNAL OF APPLIED POLYMER SCIENCE
(2022)
Article
Polymer Science
Kaihuai Yang, Zhendong Tang, Yuanji Ye, Min Ding, Peiqian Zhang, Yongkang Zhu, Qiaohang Guo, Guiqing Chen, Mingcen Weng
Summary: Intelligent actuators have become a research hotspot in the field of smart materials due to their diverse actuation modes, various deformation types, and wide applications. This study proposes dual-responsive and bidirectional bending actuators that can be driven by humidity and light, and demonstrates their potential in intelligent robotics through three demo models.
JOURNAL OF APPLIED POLYMER SCIENCE
(2022)
Article
Polymer Science
Yuji Ma, Mei Fang, Ming Huang, Na Zhang, Bo Lu, Peipei Yang, Chuntai Liu, Changyu Shen
Summary: A structure optimization strategy was proposed to fabricate non-woven enhanced thermoplastic polyurethane nanocomposite films with a sandwich-like structure. The prepared films showed excellent solid particle erosion resistance, high-tensile strength, and increased thermal conductivity, extending their application on wind turbine blades.
JOURNAL OF APPLIED POLYMER SCIENCE
(2021)
Article
Polymer Science
Elaine C. Lopes Pereira, Bluma G. Soares, Adriana A. Silva, Guilherme M. O. Barra
Summary: Conducting polymer composites made of PVDF/EVA/CNT were prepared using various melt mixing procedures, with the master batch approach showing positive effects on electrical properties and CNT preferentially localizing in the EVA phase. Increasing CNT content can improve the conductivity of the nanocomposites.
JOURNAL OF APPLIED POLYMER SCIENCE
(2021)
Article
Polymer Science
Zinah N. Alabdali, Emanuel Irizarry, Mary P. Reiter, Ali Ashraf, Jennifer K. Lynch-Branzoi, Adrian B. Mann
Summary: By adding hydroxyapatite and graphene to methyl methacrylate, high-mechanical strength and low viscosity in the cured state can be achieved. These additives also affect optical properties, photocuring process, and intermolecular bonding, leading to enhanced mechanical properties.
JOURNAL OF APPLIED POLYMER SCIENCE
(2021)
Article
Polymer Science
Mario P. Maldonado, Gabriel M. Pinto, Lidiane Cristina Costa, Guilhermino J. M. Fechine
Summary: In this study, a ductile thermoplastic polyurethane (TPU)/graphene nanocomposite with enhanced thermal conductivity was produced via melt compounding technique. Analysis showed that the addition of graphene improved thermal conductivity by about 14% without compromising the composite's ductility, making it a promising material for additive manufacturing processes like 3D printing.
JOURNAL OF APPLIED POLYMER SCIENCE
(2022)
Article
Polymer Science
Mahmut Muhammettursun, Tayfun Bel, Elif Kocacinar, Ecem Erman, Fuat Berke Gul, Andy Augousti, Nilgun Baydogan
Summary: The technique for synthesizing poly (methyl methacrylate) (PMMA) using graphene nanoplatelets (GNPs) has been improved to enhance the elastic properties of the polymer. The addition of GNPs at 2 wt% by mass increased compressive strength by 42.7% and Rockwell hardness by 19.9%. The structural changes due to the addition of GNPs were found to be uniquely linked to improvements in elastic parameters of the PMMA/GNPs nanocomposite.
JOURNAL OF APPLIED POLYMER SCIENCE
(2021)