Radially grown carbon nanomaterials on hollow glass microspheres and their application in composite foams with excellent electromagnetic interference shielding

2021 ◽  
Author(s):  
Mohammed Imran ◽  
Soumen Pal ◽  
Mousumi Upadhyay Kahaly ◽  
Ariful Rahaman
Keyword(s):  
Electromagnetic Interference ◽  
Carbon Nanomaterials ◽  
Electromagnetic Interference Shielding ◽  
Glass Microspheres ◽  
Hollow Glass Microspheres ◽  
Hollow Glass ◽  
Composite Foams

scholarly journals Composite Foams Prepared through Hollow Glass Microspheres Assisted Bubbling

2013 ◽  
Vol 22 (1) ◽  
pp. 096369351302200
Author(s):  
Zhenguo An ◽  
Jingjie Zhang
Keyword(s):  
Heat Insulation ◽  
Cell Structure ◽  
Nucleating Agent ◽  
Glass Microspheres ◽  
Insulation Property ◽  
Hollow Glass Microspheres ◽  
Hollow Glass ◽  
Foaming Process ◽  
Composite Foams ◽  
Ammonium Hydrogen

Composite foamy structures were prepared through hollow glass microspheres (HGM) assisted bubbling of silicone rubber with ammonium hydrogen carbonate as the blowing agent. The presence of HGM not only favoured the foaming process (acted as nucleating agent for the formation of minute bubbles at the initial stage of the bubbling), but also bring heterogeneous close-cell bubbles with stable inorganic shells into the foamy structure, which played an important part in the improvement of the heat insulation property of the product. Compared to the foamy structures without HGM, The composite foamy structures possessed improved heat insulation and sound absorbing properties. This work provides an additional strategy to fabricate composite foams with tailored cell structure and properties.

scholarly journals Interface Engineered Microcellular Magnetic Conductive Polyurethane Nanocomposite Foams for Electromagnetic Interference Shielding

2021 ◽  
Vol 13 (1) ◽  
Author(s):  
Guolong Sang ◽  
Pei Xu ◽  
Tong Yan ◽  
Vignesh Murugadoss ◽  
Nithesh Naik ◽  
...  
Keyword(s):  
Electromagnetic Interference ◽  
Magnetic Loss ◽  
Interfacial Polarization ◽  
Conductive Network ◽  
Shielding Effectiveness ◽  
Electromagnetic Interference Shielding ◽  
Multiple Reflections ◽  
Conduction Loss ◽  
Composite Foams ◽  
Emi Se

Abstract Lightweight microcellular polyurethane (TPU)/carbon nanotubes (CNTs)/ nickel-coated CNTs (Ni@CNTs)/polymerizable ionic liquid copolymer (PIL) composite foams are prepared by non-solvent induced phase separation (NIPS). CNTs and Ni@CNTs modified by PIL provide more heterogeneous nucleation sites and inhibit the aggregation and combination of microcellular structure. Compared with TPU/CNTs, the TPU/CNTs/PIL and TPU/CNTs/Ni@CNTs/PIL composite foams with smaller microcellular structures have a high electromagnetic interference shielding effectiveness (EMI SE). The evaporate time regulates the microcellular structure, improves the conductive network of composite foams and reduces the microcellular size, which strengthens the multiple reflections of electromagnetic wave. The TPU/10CNTs/10Ni@CNTs/PIL foam exhibits slightly higher SE values (69.9 dB) compared with TPU/20CNTs/PIL foam (53.3 dB). The highest specific EMI SE of TPU/20CNTs/PIL and TPU/10CNTs/10Ni@CNTs/PIL reaches up to 187.2 and 211.5 dB/(g cm−3), respectively. The polarization losses caused by interfacial polarization between TPU substrates and conductive fillers, conduction loss caused by conductive network of fillers and magnetic loss caused by Ni@CNT synergistically attenuate the microwave energy.

Effect of Hollow Glass Microspheres on the Morphology, Rheology and Crystallinity of Short Bamboo Fiber-Reinforced Hybrid Polypropylene Composite

JOM ◽  
2018 ◽  
Vol 71 (2) ◽  
pp. 548-558 ◽  
Author(s):  
Rupam Gogoi ◽  
Nityanshu Kumar ◽  
Shubham Mireja ◽  
Sham Sundar Ravindranath ◽  
Gaurav Manik ◽  
...  
Keyword(s):  
Bamboo Fiber ◽  
Fiber Reinforced ◽  
Glass Microspheres ◽  
Polypropylene Composite ◽  
Hollow Glass Microspheres ◽  
Hollow Glass
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