Preparation of Cellulose Nanofibrils and Their Applications: High Strength Nanopapers and Polymer Composite Films

To avoid conductive failure due to the cracks of the metal thin film under external loads for the wearable strain sensor, a stretchable metal/polymer composite film embedded with silver nanowires (AgNWs) was examined as a potential candidate. The combination of Ag film and AgNWs enabled the fabrication of a conductive film that was applied as a high sensitivity strain sensor, with gauge factors of 7.1 under the applied strain of 0–10% and 21.1 under the applied strain of 10–30%. Furthermore, the strain sensor was demonstrated to be highly reversible and remained stable after 1000 bending cycles. These results indicated that the AgNWs could act as elastic conductive bridges across cracks in the metal film to maintain high conductivity under tensile and bending loads. As such, the strain sensor engineered herein was successfully applied in the real-time detection and monitoring of large motions of joints and subtle motions of the mouth.

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Influence of ion beam and silver nanoparticles on dielectric properties of flexible PVA/PANI polymer composite films

Plastics Rubber and Composites ◽

10.1080/14658011.2021.1928998 ◽

2021 ◽

pp. 1-12

Author(s):

M. M. Abdelhamied ◽

A. M. Abdelreheem ◽

A. Atta

Keyword(s):

Silver Nanoparticles ◽

Dielectric Properties ◽

Polymer Composite ◽

Ion Beam ◽

Composite Films

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Utilization of Polymer Concrete Composites for a Circular Economy: A Comparative Review for Assessment of Recycling and Waste Utilization

Polymers ◽

10.3390/polym13132135 ◽

2021 ◽

Vol 13 (13) ◽

pp. 2135

Author(s):

Hatem Alhazmi ◽

Syyed Adnan Raheel Shah ◽

Muhammad Kashif Anwar ◽

Ali Raza ◽

Muhammad Kaleem Ullah ◽

...

Keyword(s):

Polymer Composites ◽

Polymer Composite ◽

Circular Economy ◽

Agricultural Waste ◽

High Strength ◽

Supplementary Cementitious Materials ◽

Polymer Concrete ◽

Promising Alternative ◽

Detailed Review ◽

Comparative Review

Polymer composites have been identified as the most innovative and selective materials known in the 21st century. Presently, polymer concrete composites (PCC) made from industrial or agricultural waste are becoming more popular as the demand for high-strength concrete for various applications is increasing. Polymer concrete composites not only provide high strength properties but also provide specific characteristics, such as high durability, decreased drying shrinkage, reduced permeability, and chemical or heat resistance. This paper provides a detailed review of the utilization of polymer composites in the construction industry based on the circular economy model. This paper provides an updated and detailed report on the effects of polymer composites in concrete as supplementary cementitious materials and a comprehensive analysis of the existing literature on their utilization and the production of polymer composites. A detailed review of a variety of polymers, their qualities, performance, and classification, and various polymer composite production methods is given to select the best polymer composite materials for specific applications. PCCs have become a promising alternative for the reuse of waste materials due to their exceptional performance. Based on the findings of the studies evaluated, it can be concluded that more research is needed to provide a foundation for a regulatory structure for the acceptance of polymer composites.

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Soil microbiomes mediate degradation of vinyl ester-based polymer composites

Communications Materials ◽

10.1038/s43246-020-00102-1 ◽

2020 ◽

Vol 1 (1) ◽

Author(s):

Adam M. Breister ◽

Muhammad A. Imam ◽

Zhichao Zhou ◽

Md Ariful Ahsan ◽

Juan C. Noveron ◽

...

Keyword(s):

Polymer Composites ◽

Polymer Composite ◽

Structural Integrity ◽

Abiotic Factors ◽

High Strength ◽

Strength Properties ◽

Naturally Occurring ◽

Structural Applications ◽

Acrylate Esters ◽

Bacterial Groups

AbstractPolymer composites are attractive for structural applications in the built environment due to their lightweight and high strength properties but suffer from degradation due to environmental factors. While abiotic factors like temperature, moisture, and ultraviolet light are well studied, little is known about the impacts of naturally occurring microbial communities on their structural integrity. Here we apply complementary time-series multi-omics of biofilms growing on polymer composites and materials characterization to elucidate the processes driving their degradation. We measured a reduction in mechanical properties due to biologically driven molecular chain breakage of esters and reconstructed 121 microbial genomes to describe microbial diversity and pathways associated with polymer composite degradation. The polymer composite microbiome is dominated by four bacterial groups including the Candidate Phyla Radiation that possess pathways for breakdown of acrylate, esters, and bisphenol, abundant in composites. We provide a foundation for understanding interactions of next-generation structural materials with their natural environment that can predict their durability and drive future designs.

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