by Dimitrios Dionysopoulos  , Olga Gerasimidou  and Constantinos Papadopoulos

Received: 01 May 2022;  Published: 01 June 2022;  doi: 10.21926/rpm.2202011

Glass ionomer cements (GICs) are dental materials that were invented by Wilson & Kent in 1972. They can chemically bond to enamel and dentin and can exhibit anti-cariogenic activity that allows the release and uptake of fluoride ions. They also possess the ability to render color. The setting reaction of GICs is a neutralization reaction that results in the formation of polycarboxylate salts. The most important GIC modification process involves the addition of resin components, resulting in the development of resin [...]

by Sabine Neusatz Guilhen  , Tamires Watanabe  , Thalita Tieko Silva  , Suzimara Rovani  , Júlio Takehiro Marumo  , Jorge Alberto Soares Tenório  , Ondřej Mašek  and Leandro Goulart de Araujo

Received: 19 April 2022;  Published: 19 May 2022;  doi: 10.21926/rpm.2202010

The point of zero charge (PZC) is an inherent electrokinetic property of biochars (BC). It influences the adsorption process under certain pH conditions. Herein, we report the method of determination of the PZC values of ten standard BCs. We used the salt addition method to select the BCs with suitable properties for methylene blue (MB) removal from aqueous solutions. The standard BCs were obtained by pyrolyzing five different biomasses at two distinct temperatures (550°C and 700°C). The BCs derived from rice husk [...]

by Trenton Cersoli  , Muneer Barnawi  , Kerry Johnson  , Edward Burden  , Frank Li  , Eric MacDonald  and Pedro Cortes

Received: 17 February 2022;  Published: 29 April 2022;  doi: 10.21926/rpm.2202009

Shape memory polymers (SMPs) are smart materials that can respond to certain thermal, chemical or electrical stimuli by inducing a structural conformation change into a temporary shape. In this work, a 3D printing process based on a Vat Photo-polymerization of a shape memory polymer (SMP) was investigated to produce customized smart and complex morphable antennas. The mechanical and material properties were examined through a tensile, flexural and rheological testing for different polymer mixture ratios. It was obs [...]

by Kai-Yang Liu  , Li-Xia Yin  , Xu Lin  and Shun-Xing Liang

Received: 20 March 2022;  Published: 21 April 2022;  doi: 10.21926/rpm.2202008

Biomaterials have always been the focus of material scientists and engineers. Titanium and its alloys have favorable properties, such as high strength, low density, good corrosion resistance, non-toxicity, low elastic modulus, biocompatibility, etc. Thus, Ti alloys have received much attention from scientists and engineers who work with biomaterials. Among these properties, the elastic modulus is a very important property for implant biomaterials because it avoids the “stress shielding” effect. In this study, we su [...]

by Recent Progress in Materials Editorial Office

Received: 11 April 2022;  Published: 14 April 2022;  doi: 10.21926/rpm.2202007

An Interview with Prof. Vincenzo M. Sglavo.

by Akash Dakhane  and Narayanan Neithalath

Received: 03 February 2022;  Published: 08 April 2022;  doi: 10.21926/rpm.2202006

The influence of different levels of alkalinity, expressed using M2O-to-binder ratio (n) and activator SiO2-to-M2O ratio (Ms), (M being the Na+ or K+ cation) on the reaction kinetics, compressive strength development and the reaction product formation in slag-based systems activated using alkali powders are discussed. The fundamental idea is to better understand one-part, “just-add-water” type alkali activated binders that are easy-to-use than the systems that rely on liquid activators. The difference in the behavi [...]

by Yaser Banadaki  , Nariman Razaviarab  , Hadi Fekrmandi  , Guoqiang Li  , Patrick Mensah  , Shuju Bai  and Safura Sharifi

Received: 24 November 2021;  Published: 28 February 2022;  doi: 10.21926/rpm.2201005

Additive Manufacturing (AM) is a crucial component of the smart manufacturing industry. In this paper, we propose an automated quality grading system for the fused deposition modeling (FDM) process as one of the major AM processes using a developed real-time deep convolutional neural network (CNN) model. The CNN model is trained offline using the images of the internal and surface defects in the layer-by-layer deposition of materials and tested online by studying the performance of detecting and grading the failure [...]

by Obinna Okolie  , Iwona Stachurek  , Balasubramanian Kandasubramanian  and James Njuguna

Received: 16 November 2021;  Published: 23 February 2022;  doi: 10.21926/rpm.2201004

There is a current need for tissue and organ repairs, replacement, and regeneration for patients who suffer from diseased or damaged tissues or organs. This situation is continuously on the rise and the supply of this form of therapy does not meet the patients demand mostly due to lack of donors and biocompatibility issues which causes immune system rejection of the implants. To succeed through these limitations, researchers are currently investigating the use of scaffolds as another approach for implants. The conv [...]

by Geeta Pokhrel  , Hongmei Gu  , Douglas J. Gardner  and Shane O'Neill

Received: 07 December 2021;  Published: 09 February 2022;  doi: 10.21926/rpm.2201003

This study is expanding the previous studies that were focused on the material properties and transportation costs of the two alternative feedstocks for manufacturing wood-plastic composites (WPCs): wood flour and pellets. Besides the material properties and cost analysis, life-cycle assessment (LCA) is equally important to assess the environmental impacts of these two alternative wood feedstocks to manufacture WPCs and gain the knowledge of influences from the manufacturing and transportation processes. The main g [...]

by Jeonghyeon Cheon  and Seunghyun Kim

Received: 21 October 2021;  Published: 25 January 2022;  doi: 10.21926/rpm.2201002

3D printing is an attractive method to fabricate microfluidic devices due to (1) its fast and simple process without specialized equipment and cleanroom environment, and (2) its capability to create complex 3D structures. Combined with Polydimethylsiloxane (PDMS), it can be used to develop various microfluidic devices taking advantage of both 3D printing and PDMS. In this paper, we investigated a Digital Light Processing (DLP) 3D printer to fabricate 3D printing/PDMS integrated microfluidic devices. We used it to f [...]