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Open Access

ISSN 2689-5846

© 2024 by the authors; CC BY 4.0 licence

Recent Progress in Materials , Volume 6 , Issue 4 (2024)

Pages: 108

Published: January 2025

(This book is a printed edition that was published in  Recent Progress in Materials)

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Cover Story: Construction and demolition waste (CDW) represents 38.2% of the total CDW and MSW streams in Brazil. Just 7.2% by weight of CDW is recycled. This work evaluates possible reduction of raw material consumption through recycling of CDW. It was estimated 10.3% of natural aggregates could be replaced by recycled aggregates. View this paper

Volume 6,Issue 4

Open Access Original Research

Construction & Demolition Waste and Circular Economy: The Case Study of a Brazilian City

Received: 11 August 2024;  Published: 24 December 2024;  doi: 10.21926/rpm.2404029

Abstract

Construction and demolition waste (CDW) is a significant waste stream in Brazil. It represents 38.2% of the total CDW and MSW streams. The recycling of CDW in Brazil is estimated to be at least 7.2% by weight (collected CDW) or about 15% by volume (produced CDW). Therefore, only a tiny part of CDW is returned to construction activities. On the other hand, 48.9% of the total amount of the top fifty extracted minerals in the country is sand and gravel, which is used in the national construction in [...]

Open Access Original Research

Mechanical Characterization of a Tunable 3-D Collagen-Hyaluronic Acid Hydrogel for Use in Cell Culture

Received: 28 June 2024;  Published: 17 December 2024;  doi: 10.21926/rpm.2404028

Abstract

Many cells demonstrate variances in behavior due to their cell culture environment. To provide a mechanically-tunable, tissue-like environment, a 3D hydrogel for cell culture was formulated using collagen (Col) and hyaluronic acid (HA) to help provide a system for studying these dynamic cellular responses in a soft-tissue environment. A design of experiments was organized to study the effects of collagen concentration, HA fragment size, and Col: HA mass ratio on the hydrogel mechanical propertie [...]

Open Access Review

Viral/Non-Viral Vectors in DNA/RNA Delivery Technology

Received: 26 August 2024;  Published: 12 December 2024;  doi: 10.21926/rpm.2404027

Abstract

Viral and non-viral vectors for nucleic acids (DNA/RNA) therapeutics are important in development of pharmaceutical industries. Although viral vectors have shown significant impact in transfection of DNA/RNA, but numerus studies have shown that non-viral vectors are also effective for the safe and targeted delivery of DNA/RNA to exact location in the body with high percentage of efficacy, safety, and low-immunogenicity. It is also important to protect the nucleic acids from degradation and large [...]

Open Access Review

Current Advancements in the Behavior Analysis of EPDM Elastomers in Peripheral Applications of the Cathodic Side of PEMFC Systems

Received: 30 June 2024;  Published: 04 November 2024;  doi: 10.21926/rpm.2404026

Abstract

This review examines the latest developments in the study of how Ethylene Propylene Diene Monomer (EPDM) elastomers behave in peripheral applications of Proton Exchange Membrane Fuel Cells (PEMFCs), specifically on the cathodic side. The review highlights the crucial role of EPDM in maintaining the integrity and efficiency of PEMFCs in challenging conditions characterized by varying temperatures, humidity, and acidic environments. The study examines the impact of various additives and vulcanizat [...]

Open Access Review

Research Progress in Enhancing Proton Conductivity of Sulfonated Aromatic Polymers with ZIFs for Fuel Cell Applications

Received: 22 June 2024;  Published: 04 November 2024;  doi: 10.21926/rpm.2404025

Abstract

The escalating global temperatures and their adverse effects underscore the growing imperative for the widespread adoption of clean fuels, notably hydrogen. Proton Exchange Membrane Fuel Cells (PEMFC) emerge as a pivotal green energy technology, facilitating electricity and water generation. The optimization of PEMFC efficiency hinges on the judicious selection and fabrication of polymer membranes. Within innovative materials, Zeolitic Imidazolate Frameworks (ZIFs) represent a novel subclass wit [...]
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