Recent progress in materials最新文献_第8页

A Case Study on the Impact of Transportation of Mass Timber Products on the Cradle-to-Gate LCA Results for an Institutional Building 大型木材产品运输对机构建筑从摇篮到大门LCA结果影响的案例研究

Recent progress in materials Pub Date : 2022-04-21 DOI: 10.21926/rpm.2203014

C. Gu, H. Gu, Meng Gong, Janet Blackadar

{"title":"A Case Study on the Impact of Transportation of Mass Timber Products on the Cradle-to-Gate LCA Results for an Institutional Building","authors":"C. Gu, H. Gu, Meng Gong, Janet Blackadar","doi":"10.21926/rpm.2203014","DOIUrl":"https://doi.org/10.21926/rpm.2203014","url":null,"abstract":"Mass timber products (MTPs) are being adopted in new building constructions and remodels in the last three decades, credited to their renewable and low carbon footprint characteristics. However, there are no mass timber manufacturers currently existing in Atlantic Canada. Extended distances of transporting MTPs to this region from other Canadian provinces may sacrifice the environmental benefits of using MTPs. This study was aimed to understand, via conducting a cradle-to-gate life cycle assessment (LCA), the environmental impacts of a mid-rise institutional building, which is located in the Province of New Brunswick Canada. By comparing the current steel frame design of this building with an alternative mass timber building design with the same height range and function including the transportations of major building materials. It was found that the mass timber building design could still have environmental advantages over the steel structure, as much as 19.5% lower global warming impact and 16.8% lower ozone depletion impact, even with MTPs delivered from the furthest location considered in this study. However, the disadvantages in other impact categories, such as 31.9% higher smog impact, 13.6% higher acidification impact, and 248.2% higher eutrophication impact were found when using the TRACI impact assessment in this whole building LCA study.","PeriodicalId":87352,"journal":{"name":"Recent progress in materials","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42841712","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Role of Point of Zero Charge in the Adsorption of Cationic Textile Dye on Standard Biochars from Aqueous Solutions: Selection Criteria and Performance Assessment 零电荷点在标准生物炭从水溶液中吸附阳离子纺织染料中的作用:选择标准和性能评价

Recent progress in materials Pub Date : 2022-04-19 DOI: 10.21926/rpm.2202010

S. Guilhen, Tamires Watanabe, T. T. Silva, S. Rovani, J. T. Marumo, J. Tenório, O. Mašek, L. G. D. Araujo

{"title":"Role of Point of Zero Charge in the Adsorption of Cationic Textile Dye on Standard Biochars from Aqueous Solutions: Selection Criteria and Performance Assessment","authors":"S. Guilhen, Tamires Watanabe, T. T. Silva, S. Rovani, J. T. Marumo, J. Tenório, O. Mašek, L. G. D. Araujo","doi":"10.21926/rpm.2202010","DOIUrl":"https://doi.org/10.21926/rpm.2202010","url":null,"abstract":"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 (pHPZC at 7.22 and 7.64 for RH550 and RH700, respectively) and softwood pellets (pHPZC at 6.57 and 6.78 for SWP500 and SWP700, respectively) were selected for their compatibility with cationic dyes such as MB. Results from adsorption experiments indicated the potential use of the RH biochar as an adsorbent for the removal of MB from aqueous solutions. The removal efficiencies were 68.83% and 71.97% for RH550 and RH700, respectively. Considerably low values were obtained for SWP550 and SWP700 (21.61% and 22.84%, respectively). Equilibrium was achieved at 2 h for RH550 and 1 h for RH700, and the adsorption kinetics for the RH BCs could be described by a pseudo-second order equation. The results revealed that even when produced under comparable conditions, BCs obtained from different feedstocks exhibited different cationic dye removing abilities. BCs optimized for the removal of cationic or anionic dyes can be easily engineered by appropriately matching the feedstock with the processing conditions.","PeriodicalId":87352,"journal":{"name":"Recent progress in materials","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44575120","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

An Interview with Prof. Vincenzo M. Sglavo 对Vincenzo M.Sglavo教授的采访

Recent progress in materials Pub Date : 2022-04-11 DOI: 10.21926/rpm.2202007

引用次数: 0

Development of Low Elastic Modulus Titanium Alloys as Implant Biomaterials 低弹性模量钛合金作为植入生物材料的研究进展

Recent progress in materials Pub Date : 2022-03-20 DOI: 10.21926/rpm.2202008

Kaixuan Liu, L. Yin, Xu Lin, S. Liang

引用次数: 4

Indoor Built Environments Attended by Primary School Children and Its Microbiology: A Cross-Project Study 小学生参与的室内建筑环境及其微生物学：一项跨项目研究

Recent progress in materials Pub Date : 2022-03-10 DOI: 10.21926/rpm.2203015

Joana Sousa

{"title":"Indoor Built Environments Attended by Primary School Children and Its Microbiology: A Cross-Project Study","authors":"Joana Sousa","doi":"10.21926/rpm.2203015","DOIUrl":"https://doi.org/10.21926/rpm.2203015","url":null,"abstract":"Exposure to indoor pollutants may exert a significant effect on children health as they spend most of their time in enclosed environments. This research compared the association of biological concentrations with indoor characteristics and building materials in places where children spend significant time indoors. It was compared the results of two autonomous research projects conducted in Porto primary schools and households. Both the projects included a walkthrough inspection and biological measurements in indoor environments in primary school classrooms and home bedrooms, respectively. Floor covering material was the major building characteristic associated with fungal concentrations. In addition, significant associations were observed between the heating system and Fusarium sp. and the type of glazing and Fumigatus sp. A comparison of the results between the two projects demonstrated similarities in the association of microbial concentrations with building materials, particularly with the floor type. This demonstrated that specific building materials could be a source of exposure to indoor pollutants. The influence of building materials on indoor air quality (IAQ) should be considered using building codes. When performing building retrofitting, professionals should be aware of the nexus between building materials-energy-IAQ-health, which, if not properly managed, could negate the efforts of meeting climate and related sustainable development goals.","PeriodicalId":87352,"journal":{"name":"Recent progress in materials","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42548142","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

4D Printed Shape Memory Polymers: Morphology and Fabrication of a Functional Antenna 4D印刷形状记忆聚合物：功能天线的形态和制造

Recent progress in materials Pub Date : 2022-02-17 DOI: 10.21926/rpm.2202009

Trenton Cersoli, Muneer Barnawi, Kerry Johnson, Edward Burden, Frank X. Li, E. MacDonald, P. Cortes

{"title":"4D Printed Shape Memory Polymers: Morphology and Fabrication of a Functional Antenna","authors":"Trenton Cersoli, Muneer Barnawi, Kerry Johnson, Edward Burden, Frank X. Li, E. MacDonald, P. Cortes","doi":"10.21926/rpm.2202009","DOIUrl":"https://doi.org/10.21926/rpm.2202009","url":null,"abstract":"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 observed that the combination of 20% of an elastomeric resin in a thermoset UV system yields the highest shape recovery performance. The fabrication process of the antenna was based on the incorporation of a conductive material. The approach involved the inclusion of a thin copper electroplating technique. The radiofrequency performance of the fabricated antenna was examined by a vector network analyzer (VNA) and it was observed that a thermal stimulus was capable of inducing a conformal shape on the antenna, resulting in a multi-radio frequency morphing system. The antenna performance was simulated in Ansys HFSS.","PeriodicalId":87352,"journal":{"name":"Recent progress in materials","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48181934","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Reaction Kinetics and Characterization of Slag-Based, High Strength, “Just-Add-Water” Type (One-Part) Alkali-Activated Binders 渣基高强度“刚加水”型(单组分)碱活化粘结剂的反应动力学与表征

Recent progress in materials Pub Date : 2022-02-03 DOI: 10.21926/rpm.2202006

Akash Dakhane, N. Neithalath

{"title":"Reaction Kinetics and Characterization of Slag-Based, High Strength, “Just-Add-Water” Type (One-Part) Alkali-Activated Binders","authors":"Akash Dakhane, N. Neithalath","doi":"10.21926/rpm.2202006","DOIUrl":"https://doi.org/10.21926/rpm.2202006","url":null,"abstract":"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 behavior of the systems with changes in the cationic species (Na+ or K+) and the overall levels of alkalinity is elucidated. Heat release and its rate, and thermal analysis and Fourier Transform Infrared Spectroscopy (FTIR) are used for the characterization of the reaction and the products formed. The influence of activator alkalinity on the initial dissolution and acceleration phases is examined using isothermal calorimetry. An increase in Ms is found to result in reduced early-age and slightly increased later-age compressive strengths. The activator cationic species influences later-age strengths, with K-silicate activated mortars showing a higher strength. The strength data is related to the C-(A)-S-H gel formation. The study shows that slag-based binders can be proportioned to obtained compressive strengths in excess of 80 MPa at later ages (56 days), and up to 30 MPa within 72 hours. The optimal alkali levels based on n and Ms for both the Na- and K-based activator systems are determined.","PeriodicalId":87352,"journal":{"name":"Recent progress in materials","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48316417","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Acknowledgment to Reviewers of Recent Progress in Materials in 2021 对2021年材料最新进展的评审人员的认可

Recent progress in materials Pub Date : 2022-01-06 DOI: 10.21926/rpm.2201001

Recent Progress in Nutrition Editorial Office

引用次数: 0

Life Cycle Assessment (LCA) of Wood Flour and Pellets for Manufacturing Wood-Plastic Composites (WPCs) 木塑复合材料用木粉和木屑颗粒的生命周期评价

Recent progress in materials Pub Date : 2021-12-07 DOI: 10.21926/rpm.2201003

G. Pokhrel, H. Gu, D. Gardner, S. O'Neill

{"title":"Life Cycle Assessment (LCA) of Wood Flour and Pellets for Manufacturing Wood-Plastic Composites (WPCs)","authors":"G. Pokhrel, H. Gu, D. Gardner, S. O'Neill","doi":"10.21926/rpm.2201003","DOIUrl":"https://doi.org/10.21926/rpm.2201003","url":null,"abstract":"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 goal of this study was to compare the environmental impacts from the production and transportation of wood flour and pellets utilized in WPC manufacture. The environmental impacts on air, water, soil and human health, as well as the cumulated energy consumption for one tonne and one truckload of the two wood feedstocks were compared. The case-study was based on a commercial wood pellet manufacturer in the state of Maine (ME). The cradle-to-gate approach was considered including the processing of mill residues, manufacturing of the two feedstocks and transporting them to commercial WPC manufacturers. LCA analysis showed that transportation of both feedstocks had the highest impact on the environment as opposed to the inputs associated with production. The global warming potential (GWP) from one tonne production and shipment of wood flour was higher by 8% compared to the pellets. One tonne production and shipment of wood pellets appears more environmentally friendly. Normalization results of one truck load of wood flour (22 tonnes) and pellets (30 tonnes) showed similar environmental impacts. Based on this study, from an environmental perspective, it is inferred that besides use as bio-fuels, wood pellets could be a better alternative feedstock for the manufacture of WPCs.","PeriodicalId":87352,"journal":{"name":"Recent progress in materials","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-12-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48811617","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Automated Quality and Process Control for Additive Manufacturing using Deep Convolutional Neural Networks 基于深度卷积神经网络的增材制造质量和过程自动化控制

Recent progress in materials Pub Date : 2021-11-24 DOI: 10.21926/rpm.2201005

Y. Banadaki, Nariman Razaviarab, H. Fekrmandi, Guoqiang Li, P. Mensah, Shuju Bai, S. Sharifi

{"title":"Automated Quality and Process Control for Additive Manufacturing using Deep Convolutional Neural Networks","authors":"Y. Banadaki, Nariman Razaviarab, H. Fekrmandi, Guoqiang Li, P. Mensah, Shuju Bai, S. Sharifi","doi":"10.21926/rpm.2201005","DOIUrl":"https://doi.org/10.21926/rpm.2201005","url":null,"abstract":"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 in AM process at different extruder speeds and temperatures. The model demonstrates an accuracy of 94% and specificity of 96%, as well as above 75% in measures of the F-score, the sensitivity, and the precision for classifying the quality of the AM process in five grades in real-time. The high-performance of the model could not be achieved with the values usually used for printing temperature and printing speed, only in addition with much higher values. The proposed online model adds an automated, consistent, and non-contact quality control signal to the AM process. The quality monitoring signal can also be used by the AM machine to stop the AM process and eliminate the sophisticated inspection of the printed parts for internal defects. The proposed quality control model ensures reliable parts with fewer quality hiccups while improving performance in time and material consumption.","PeriodicalId":87352,"journal":{"name":"Recent progress in materials","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-11-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44533623","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3