Green Materials最新文献_第8页

Application of extrusion plastometry in poly(3-hydroxybutyrate) (PHB) processing and the effect of ground wool fiber on the mechanical properties of PHB/wool blends 挤出塑化法在聚3-羟基丁酸酯(PHB)加工中的应用及磨羊毛纤维对PHB/羊毛共混物力学性能的影响

IF 1.9 4区材料科学

Green Materials Pub Date : 2022-12-15 DOI: 10.1680/jgrma.22.00026

Hailemichael O. Yosief, Cheng‐Kung Liu, R. Ashby, G. Strahan, N. Latona, Nusheng Chen

{"title":"Application of extrusion plastometry in poly(3-hydroxybutyrate) (PHB) processing and the effect of ground wool fiber on the mechanical properties of PHB/wool blends","authors":"Hailemichael O. Yosief, Cheng‐Kung Liu, R. Ashby, G. Strahan, N. Latona, Nusheng Chen","doi":"10.1680/jgrma.22.00026","DOIUrl":"https://doi.org/10.1680/jgrma.22.00026","url":null,"abstract":"Poly(3-hydroxybutyrate) (PHB) is a well-known member of the polyhydroxyalkanoate family of biopolymers and it has been extensively investigated as an environmentally-benign replacement for petrochemical-based polymers. The practical application of PHB in the biomedical field and in packaging has been limited because of its relatively narrow processing window, high brittleness, and low thermal stability. In this study, a melt flow extrusion plastometer was used to investigate the processability of PHB by evaluating its melt flow rate and the mechanical properties of its monofilament extrudates. The monofilament extrudates were collected after exposure to different processing temperatures (180°C and 190°C) and heating times as well as after blending the biopolymer with different fractions of ground raw wool. The melt flow rate of PHB was not significantly affected when blended with different amounts of wool fiber. However, the melt flow rate increased significantly with the increase in heat duration and temperature. The mechanical properties of the monofilament extrudates from the parental PHB and PHB/wool blends were influenced by the fraction of wool, temperature, and heat duration. The results of this study will be useful in selecting appropriate conditions to produce PHB-based blends/composites with desirable properties for a wide range of applications.","PeriodicalId":12929,"journal":{"name":"Green Materials","volume":" ","pages":""},"PeriodicalIF":1.9,"publicationDate":"2022-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44428227","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Editorial 社论

IF 1.9 4区材料科学

Green Materials Pub Date : 2022-12-01 DOI: 10.1680/jgrma.2022.10.4.145

Peter Halley

引用次数: 0

Greener and scalable synthesis of N-methyl imines using poly(N-vinylimidazole), a more sustainable functional polymer 使用更可持续的功能聚合物聚（N-乙烯基咪唑）更绿色、可扩展地合成N-甲基亚胺

IF 1.9 4区材料科学

Green Materials Pub Date : 2022-09-21 DOI: 10.1680/jgrma.22.00068

Peyman Mihankhah, N. G. Khaligh

引用次数: 1

Research advances of vegetable oil based pressure sensitive adhesives 植物油基压敏胶的研究进展

IF 1.9 4区材料科学

Green Materials Pub Date : 2022-09-12 DOI: 10.1680/jgrma.22.00061

Yufeng Ma, Yuan Ji, Jiale Zhang, Ye Sha, P. Jia, Yonghong Zhou

引用次数: 1

A comparative study of mechanical properties of polylactide bio-composites with woven and non-woven jute reinforcements 织造与非织造黄麻增强聚乳酸生物复合材料力学性能的比较研究

IF 1.9 4区材料科学

Green Materials Pub Date : 2022-09-08 DOI: 10.1680/jgrma.21.00060

D. Lascano, Cristobal Aljaro, E. Fages, S. Rojas‐Lema, J. Ivorra‐Martinez, N. Montanes

{"title":"A comparative study of mechanical properties of polylactide bio-composites with woven and non-woven jute reinforcements","authors":"D. Lascano, Cristobal Aljaro, E. Fages, S. Rojas‐Lema, J. Ivorra‐Martinez, N. Montanes","doi":"10.1680/jgrma.21.00060","DOIUrl":"https://doi.org/10.1680/jgrma.21.00060","url":null,"abstract":"The concern that has arisen in recent years over the excessive use of oil-based materials has made the development of new materials with low environmental impact imminent, in this context. In this study, environmentally friendly composites were obtained with a thermoplastic polylactide matrix (PLA), and jute fibers (fabrics and non-woven mats) as reinforcement. PLA/jute bio-composites were manufactured by thermocompression. The effect of the amount of jute fibers reinforcement (in the 30-50 wt.% range) on the tensile and flexural properties of these composites was analyzed, and the fiber-matrix interaction was assessed by scanning electron microscopy (SEM). The results show that thermocompression moulding is a simple technique to obtain high environmental efficiency bio-composites with high reinforcement loading (up to 50 wt.%). As expected, the tensile properties are directly related to the amount of fiber loading, as well as the directionality these fibers have in the composite. Mechanical performance is also highly dependent on fiber-matrix interactions. These bio-composites could be attractive as lightweight interior panels in automotive industry, case/covers in electric-electronics applications, shovels’ components in the wind energy industry, among others, due to their balanced mechanical properties, and the rather complex shapes that could be obtained by thermocompression.","PeriodicalId":12929,"journal":{"name":"Green Materials","volume":" ","pages":""},"PeriodicalIF":1.9,"publicationDate":"2022-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48268786","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Editorial: Like 200 hundred years ago, we need green chemistry and materials to push back the frontiers of science 社论:就像200年前一样，我们需要绿色化学和材料来推动科学的前沿

IF 1.9 4区材料科学

Green Materials Pub Date : 2022-09-01 DOI: 10.1680/jgrma.2022.10.3.97

S. Caillol

引用次数: 0

Effect of chitosan concentration on physicochemical properties of starch-based biodegradable drinking straws by extrusion 壳聚糖浓度对挤压法制备淀粉基生物可降解吸管理化性能的影响

IF 1.9 4区材料科学

Green Materials Pub Date : 2022-08-23 DOI: 10.1680/jgrma.22.00021

Wendong Fan, Jing Zhao, Houru Zong, Quanhong Li

{"title":"Effect of chitosan concentration on physicochemical properties of starch-based biodegradable drinking straws by extrusion","authors":"Wendong Fan, Jing Zhao, Houru Zong, Quanhong Li","doi":"10.1680/jgrma.22.00021","DOIUrl":"https://doi.org/10.1680/jgrma.22.00021","url":null,"abstract":"As disposable plastic straws were banned in China, more biodegradable straws were invented. Under high temperature and pressure conditions, starch is pasted and the molecular hydrogen bonds between starch are broken. After adding chitosan, chitosan and starch can form new hydrogen bonds. Biodegradable starch-based straws were made from cassava starch and rice starch (weight ratio = 1:1) by extrusion technique. Chitosan (0%, 5%, 10%, 15% and 20%) was added to improve the mechanical properties of the straws and the effect of chitosan on the chemical, mechanical and water resistance properties of the starch-based straws was investigated. Color, transparency and water resistance of CR/CH (tapioca starch, rice starch and chitosan) straws containing different levels of chitosan. The color and water resistance of straws containing different levels of chitosan were superior to those of CR (tapioca and rice starch). The best mechanical properties and water resistance of starch-based straws were obtained when the chitosan addition was 5%. The addition of chitosan flattened the appearance of the starch-based straws and improved the mechanical properties and water resistance of the straws. The above structure can provide a reference for the application of starch-based materials.","PeriodicalId":12929,"journal":{"name":"Green Materials","volume":" ","pages":""},"PeriodicalIF":1.9,"publicationDate":"2022-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44634364","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Camellia sinensis leaf extract-mediated green synthesis of CuFe2O4 nanoparticles supported on Clinoptilolite and their use in benzodiazepines synthesis 茶树叶提取物介导的斜沸石负载CuFe2O4纳米颗粒的绿色合成及其在苯二氮卓类药物合成中的应用

IF 1.9 4区材料科学

Green Materials Pub Date : 2022-08-22 DOI: 10.1680/jgrma.22.00016

Gholamrezaeenya Nazanin, Mahanpoor Kazem, G. Keivan, Abdoli-Senejani Masoomeh, Marjani Azam

{"title":"Camellia sinensis leaf extract-mediated green synthesis of CuFe2O4 nanoparticles supported on Clinoptilolite and their use in benzodiazepines synthesis","authors":"Gholamrezaeenya Nazanin, Mahanpoor Kazem, G. Keivan, Abdoli-Senejani Masoomeh, Marjani Azam","doi":"10.1680/jgrma.22.00016","DOIUrl":"https://doi.org/10.1680/jgrma.22.00016","url":null,"abstract":"In this research, CuFe2O4 Nanocatalyst stabilized on Clinoptilolite(CP)was prepared using green tea (Camellia sinensis) leaf extract. Fourier transform infrared spectra (FTIR), X-Ray diffraction patterns (XRD), field emission scanning electron microscopy (FESEM), energy dispersive X-ray (EDX), transmission electron microscopy (TEM), Brunauer Emmett Teller (BET), thermogravimetric analysis (TGA), and differential thermal analysis (DTA) were used to characterize CuFe2O4/CP. After fixation on CP, the crystal size of CuFe2O4 was determined to be 48.7 nm using an X-ray diffraction pattern and the Debye-Scherer equation. CuFe2O4 nanoparticles were successfully placed on CP as evidenced by FESEM and TEM images. Using the BJH method, the average diameter of the catalyst pores was found to be 22.2 nm. Using the BET method, the catalyst surface area was estimated to be 43.7 m2g−1. The catalytic activity of CuFe2O4/CP in the production of benzodiazepine (the reaction of o-phenylenediamine with ketones) was examined. Experimental results showed that this catalyst performs well under mild reaction conditions. Using an external magnetic field, CuFe2O4 / CP was easily separated from the reaction product and can be reused without appreciably decreasing its catalytic activity.","PeriodicalId":12929,"journal":{"name":"Green Materials","volume":" ","pages":""},"PeriodicalIF":1.9,"publicationDate":"2022-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48039181","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Physico-mechanical properties and formaldehyde emission of plywood panels by lignosulfonate-reinforced urea-formaldehyde adhesive 木质素磺酸增强脲醛胶粘剂对胶合板物理力学性能及甲醛释放量的影响

IF 1.9 4区材料科学

Green Materials Pub Date : 2022-06-17 DOI: 10.1680/jgrma.21.00069

M. Yıldırım, Zeki Candan, B. Aksoy, Turker Dundar

{"title":"Physico-mechanical properties and formaldehyde emission of plywood panels by lignosulfonate-reinforced urea-formaldehyde adhesive","authors":"M. Yıldırım, Zeki Candan, B. Aksoy, Turker Dundar","doi":"10.1680/jgrma.21.00069","DOIUrl":"https://doi.org/10.1680/jgrma.21.00069","url":null,"abstract":"The aim of the study was to investigate the effect of two different types of lignosulfonate added to urea-formaldehyde adhesive on the performance properties of five-layered plywood panels. The physical properties (density, thickness swelling, water absorption, and moisture content), mechanical properties (modulus of rupture, modulus of elasticity, and bonding quality), and free formaldehyde emission were evaluated in accordance with international standards. The results show that the lignosulfonate used in the production of plywood panels improves not only mechanical properties but also physical properties. Furthermore, the reinforcement caused by the use of proper lignosulfonate resulted in a decrease in free formaldehyde content. Using 3% LS1, eco-friendly plywood panels with improved physical (max. 22.40%) and mechanical properties (max. 42.40%) and drastically reduced free formaldehyde emissions (max. 16.27%) can be produced. It was concluded that lignosulfonates, as a byproduct of the pulping industry, can be used as a high-value additive in formaldehyde-based adhesives for engineered wood composites.","PeriodicalId":12929,"journal":{"name":"Green Materials","volume":" ","pages":""},"PeriodicalIF":1.9,"publicationDate":"2022-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46903489","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Graphene nanoplatelets (GNPs) - cellulose nanocrystal (CNC) blended in SAE 40 hybrid engine oil for automotive applications 石墨烯纳米片(GNPs) -纤维素纳米晶体(CNC)混合在SAE 40混合发动机润滑油中，用于汽车应用

IF 1.9 4区材料科学

Green Materials Pub Date : 2022-06-14 DOI: 10.1680/jgrma.21.00061

G. Kadirgama, Ajay Kumar, M. Sandhya, L. Samylingam, D. Ramasamy, K. Kadirgama, Hussein A. Mohammed, M. Samykano, R. Saidur

{"title":"Graphene nanoplatelets (GNPs) - cellulose nanocrystal (CNC) blended in SAE 40 hybrid engine oil for automotive applications","authors":"G. Kadirgama, Ajay Kumar, M. Sandhya, L. Samylingam, D. Ramasamy, K. Kadirgama, Hussein A. Mohammed, M. Samykano, R. Saidur","doi":"10.1680/jgrma.21.00061","DOIUrl":"https://doi.org/10.1680/jgrma.21.00061","url":null,"abstract":"The friction and wear of the worn surfaces is a principal cause of energy dissipation in automobile engines. The current study is supported with Graphene Nanoplatelets as an imminent material, also a carbon allotrope which has good thermal, physical, and chemical properties & Cellulose nanocrystals (CNCs) as a universal nano-sized ecological biopolymer. In view of this, the objective of the present work is to enhance the tribological behaviour and lubricant properties using hybrid Graphene nanoplatelets (GNPs) and Cellulose Nanocrystal (CNC) blended with SAE 40 having various concentrations in the range of 0.01% to 0.10%. The characterization is presented by different techniques such as X-ray diffractometer (XRD) and FESEM. The XRD patterns confirm the platelets structure of graphene nanoplatelets & Field emission scanning electron microscope (FESEM) showed the small and agglomerated particles range as 20-50 nm and 200 nm for GNPs and CNC respectively. The scanning electron microscope (SEM) geomorphology evaluation was conducted for all volumetric concentrations of single & hybrid nanolubricant. Morphological investigation indicates that there is homogeneous dispersion and there is a smoother surface after using Graphene:CNC nano lubricant compared to SAE 40.","PeriodicalId":12929,"journal":{"name":"Green Materials","volume":" ","pages":""},"PeriodicalIF":1.9,"publicationDate":"2022-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48658194","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1