Development of highly conductive hybrid <scp>Ni‐biocarbon‐</scp>based <scp>polyvinyl alcohol</scp> composites for microwave shielding properties

Rose, S. G. Hymlin; Kuppusamy, P.; Bapu, B. R. Tapas; Ponnusamy, Muruganantham

doi:10.1002/vnl.21985

Cited by 8 publications

(2 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The positive effect of fillers on the mechanical properties of polymers is often explained by the fact that carbon and metal particles are filling the pores and suppress polymer cracking. 47 However, this explanation for the case of a high filler content is not enough, and it is necessary to take into account possible interactions of the polymer matrix with GNPs and metal particles, which, according to our data, contain small amounts of oxides on their surface.…”

Section: Mechanical Propertiesmentioning

confidence: 75%

Conductive polyacrylate coatings filled with bimetal Cu–Ni, Zn–Cu, or Zn–Ni powders and graphene nanoplatelets

Kobets,

Vorobyova,

Galuza

et al. 2023

Polymer Composites

View full text Add to dashboard Cite

Conductive coatings on a glass substrate are widely used in electronics and automotive, ship, aircraft, and optical industries. The method for obtaining electroconductive polyacrylate coatings filled with bimetal Cu–Ni, Zn–Cu, or Zn–Ni particles and graphene nanoplatelets (GNPs) is developed in this work. At the ratio GNPs:bimetal powder:polymer of (33–35):(17–35):(30–50) (wt%) and the coating thickness 50 μm specific volume resistance is 0.12–0.26 Ω·cm owing to the percolation effect. Bimetal particles are synthesized by nickel or copper ions reduction from aqueous solutions on copper or zinc particles. Their composition is regulated by the duration of metal ions reduction. Bimetal particles have a structure of copper or zinc core with a loose shell of nickel or copper nanoparticles, they ensure the contact between GNPs forming a continuous network in polymer matrix. GNPs are obtained by thermal exfoliation of natural flake graphite treated in liquid ammonia containing metal sodium. Polymer composite is prepared using the solution of methyl‐ and n‐butylmethacrylate copolymer. Coatings have adequate adhesion to the glass, and owing to their high conductivity, absence of noble metals, simplicity and cheapness of fabrication can be used for production of conductive elements on glass and other substrates.Highlights Cu–Ni, Zn–Cu, or Zn–Ni powder and GNPs filled conductive polyacrylate coatings Bimetal core‐shell particles are obtained by Ni(II) or Cu(II) reduction in solutions Bimetal particles and GNPs form a network in polymer with percolation effect Specific volume resistance of coatings 50 μm thick on glass is 0.12–0.26 Ω·cm Coatings conductivity and adhesion to glass open great prospects for application

show abstract

Section: Mechanical Propertiesmentioning

confidence: 75%

Conductive polyacrylate coatings filled with bimetal Cu–Ni, Zn–Cu, or Zn–Ni powders and graphene nanoplatelets

Kobets,

Vorobyova,

Galuza

et al. 2023

Polymer Composites

View full text Add to dashboard Cite

show abstract

“…Most importantly, the CPCs could achieve the shielding mechanism of absorption loss and multiple internal reflection loss, which highly reduced the secondary reflection pollution of EMWs 11 . At present, it has been an advanced process to prepare CPCs for EMI shielding by adding highly conductive carbon series fillers (such as carbon nanotubes (CNTs) and graphene nanosheets (GNSs)), MXene Ti 3 C 2 T x , hybrid metal nanoparticles (NPs)/nanowires (NWs)/carbon‐based nanofillers, or hybrid magnetic NPs/carbon‐based nanofillers, and so forth, into the polymer matrix 12–17 . The addition of magnetic NPs such as ferrite could highly improve the magnetic hysteresis loss of CPCs 18 .…”

Section: Introductionmentioning

confidence: 99%

Recent advances in structural design of conductive polymer composites for electromagnetic interference shielding

Zheng,

Wang,

Zhu

et al. 2023

Polymer Composites

View full text Add to dashboard Cite

The proliferation of electronic devices and wireless communication in our daily lives has led to a significant increase in electromagnetic pollution. This issue poses a serious threat to the proper functioning of electronic equipment as well as human health. Therefore, the investigation of materials with superior electromagnetic interference (EMI) shielding capabilities has garnered growing interest. In this paper, the mechanisms of EMI shielding were first introduced briefly. It was noted that the development of advanced EMI shielding materials involved adhering to principles such as minimizing reflection loss, enhancing absorption loss, and incorporating multiple internal reflections. The construction and shielding properties of traditional EMI shielding materials were introduced. Unlike metal materials with high densities and reflection loss, lightweight conductive polymer composites (CPCs) have been the most promising EMI shielding materials. Meanwhile, carbon‐based nanofillers such as carbon nanotubes and graphene nanosheets, along with two‐dimensional transition metal carbonitrides MXenes Ti3C2Tx, have emerged as the most promising and versatile conductive nanofillers for CPCs. The EMI shielding performance and loss mechanism of CPCs with homogeneous structure, segregated structure, laminated structure, and porous structure were introduced in detail. It was noted that the EMI shielding performance could be significantly improved by incorporating multiple structures into the same CPCs, such as a rational combination of segregated and porous structures. Finally, the challenges and development trends of CPCs for EMI shielding applications were discussed.Highlights Mechanisms of EMI shielding were introduced from aspect of energy dissipation. Structure–property of traditional EMI shielding materials was described. EMI shielding performance of CPCs with different structures was summarized. Future challenges and growing trends of CPCs for EMI shielding were discussed. Absorption‐dominated loss and multiple structure design were emphasized.

show abstract

Synthesis of flexible magneto‐electric polyvinyl alcohol composites using hybrid filler particles of carbon quantum dots and cobalt nano for electromagnetic interference shielding application

Suresh,

Kandavalli,

Rajendiran

et al. 2024

Vinyl Additive Technology

View full text Add to dashboard Cite

The main objective of the study is to synthesis and characterization of flexible magneto‐electric Polyvinyl Alcohol (PVA) composites for Electromagnetic Interference (EMI) shielding applications, by incorporating carbon quantum dots extracted from lychee fruit husks and cobalt nanoparticles sourced from Plectranthus amboinicus. Comprehensive mechanical, dielectrical, magnetic, and shielding tests were conducted to assess the performance of these novel materials. The mechanical characteristics of the composites were assessed to gauge their flexibility and robustness. In this regard, PV4 displayed a substantial tensile strength of 68 MPa, while PV6 exhibited an enhanced shore‐D hardness rating of 47. PV6 demonstrates superior dielectric properties, including a higher dielectric constant and a lower loss tangent, which are crucial for optimizing EMI shielding efficiency. When it comes to magnetic characteristics such as magnetization, retentivity, and coercivity, the PV6 composite designation outperforms the other composites. Additionally, PV6 exhibits higher electromagnetic interference (EMI) shielding effectiveness, measuring at approximately 49.8 dB in the E band and 56.5 dB in the F band. Findings demonstrate that the integration of carbon quantum dots and cobalt nanoparticles into the matrix resulted in flexible composites with enhanced mechanical strength. The incorporation of cobalt contributed to notable magnetic properties, increasing the materials' magnetization and retentivity. The tests on electromagnetic interference (EMI) showed that the shielding effectiveness got improved. The composite materials were able to reduce interference from electromagnetic waves in the tested frequency ranges. These flexible magneto‐electric PVA composites, developed using sustainable sources such as lychee fruit husks and Plectranthus amboinicus, exhibit promising potential for EMI shielding applications in diverse industries, including telecommunications, aerospace, and electronics, where reliable interference control is essential for optimal performance and safety.Highlights Cobalt nanoparticles sourced from Plectranthus amboinicus. Carbon quantum dots are prepared from lychee fruit husks via controlled pyrolysis. High tensile strength PVA composites prepared. Highest dielectric constant of 8.2 achieved for composite PV6. Higher wave shielding up to 56.5 dB achieved in “E” band.

show abstract

Development of highly conductive hybrid Ni‐biocarbon‐based polyvinyl alcohol composites for microwave shielding properties

Cited by 8 publications

References 31 publications

Conductive polyacrylate coatings filled with bimetal Cu–Ni, Zn–Cu, or Zn–Ni powders and graphene nanoplatelets

Conductive polyacrylate coatings filled with bimetal Cu–Ni, Zn–Cu, or Zn–Ni powders and graphene nanoplatelets

Recent advances in structural design of conductive polymer composites for electromagnetic interference shielding

Synthesis of flexible magneto‐electric polyvinyl alcohol composites using hybrid filler particles of carbon quantum dots and cobalt nano for electromagnetic interference shielding application

Contact Info

Product

Resources

About