Green Materials最新文献_第7页

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

Dimer acid polyamide/montmorillonite bio-based film for the challenge of air cushion 二聚酸聚酰胺/蒙脱土生物基薄膜应对气垫挑战

IF 1.9 4区材料科学

Green Materials Pub Date : 2022-06-09 DOI: 10.1680/jgrma.22.00027

Yun Lu, C. Li, Jian Zhang, Yuxuan Guo

引用次数: 1

Editorial: Green chemistry and green materials evolve in a changing world 社论：绿色化学和绿色材料在不断变化的世界中进化

IF 1.9 4区材料科学

Green Materials Pub Date : 2022-06-01 DOI: 10.1680/jgrma.2022.10.2.49

S. Caillol

引用次数: 0

Modification of kapok cotton fibres into porous cellulose triacetate beads for oil spill remediation efforts 木棉纤维改性成多孔三醋酸纤维素微珠用于溢油修复

IF 1.9 4区材料科学

Green Materials Pub Date : 2022-05-23 DOI: 10.1680/jgrma.21.00064

Kang Zhi Yong, J. Zachariah, E. Chiang, M. Yoon

{"title":"Modification of kapok cotton fibres into porous cellulose triacetate beads for oil spill remediation efforts","authors":"Kang Zhi Yong, J. Zachariah, E. Chiang, M. Yoon","doi":"10.1680/jgrma.21.00064","DOIUrl":"https://doi.org/10.1680/jgrma.21.00064","url":null,"abstract":"Marine oil spills have been widely reported and bioremediation is proposed to be an environmentally friendly approach to clean these spills. However, maintaining a high biomass of oil-degrading bacteria has been proven challenging. Here, a carrier that enables simultaneous bacterial immobilization and oil absorption is proposed as a solution. Porous cellulose triacetate beads (PCTBs) derived from cellulose triacetate powder was obtained through the acetylation of kapok fibres. This study revealed that PCTBs with both 12.5% and 16.67% w/v precipitated in distilled water showed greater crude oil absorbency of 2.4850 ± 0.1326 g/g and 1.9852 ± 0.2343 g/g, respectively. Reusability tests of PCTBs showed promising results with no reduction in oil absorption after five reabsorption cycles. Successful immobilization of the oil-degrading bacteria, Acinetobacter venetianus on PCTBs was achieved and enumeration of bacteria showed no statistically significant differences compared to those on kapok fibres despite the raw fibres having a larger surface area. The SEM analysis revealed that A. venetianus adhered to the outer and inner walls of the beads through secreted exopolysaccharides. PCTBs with oil-degrading bacteria are potentially able to simultaneously absorb and degrade oil, thus highlighting the novelty of a working alternative to sustainable oil spill mitigation.","PeriodicalId":12929,"journal":{"name":"Green Materials","volume":" ","pages":""},"PeriodicalIF":1.9,"publicationDate":"2022-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44721530","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

Investigation of Dioscorea opposutifolia L. as green lubricat in water based drilling fluids 薯蓣作为水基钻井液绿色润滑剂的研究

IF 1.9 4区材料科学

Green Materials Pub Date : 2022-05-19 DOI: 10.1680/jgrma.21.00017

Wen-Hang Tian, Qingchen Wang, Xiongxiong Liu, Weichao Du, Jie Zhang, Chen Gang

{"title":"Investigation of Dioscorea opposutifolia L. as green lubricat in water based drilling fluids","authors":"Wen-Hang Tian, Qingchen Wang, Xiongxiong Liu, Weichao Du, Jie Zhang, Chen Gang","doi":"10.1680/jgrma.21.00017","DOIUrl":"https://doi.org/10.1680/jgrma.21.00017","url":null,"abstract":"With the increasing exploration of unconventional well, such as horizontal wells and complex wells, and the increasing strict national environmental protection regulations, the requirement for drilling fluids lubricants is more demanding. High-performance and environment-friendly lubricants for water-based drilling fluid are urgently needed. In this work, Chinese yam (Dioscorea opposutifolia L.) was investigated as a drilling fluid lubricant, the effects of Chinese yam slurry on drilling fluid lubricating properties at different temperatures were investigated, and the compatibility and inhibitory properties of Chinese yam slurry were studied. The results show that the viscosity coefficient of the mud cake is reduced by 44.5% as 1.5% Chinese yam slurryadded in water-based drilling fluids. Chinese yam also has certain temperature resistance in drilling fluids, and it can inhibit the swelling of clay. Chinese yam slurry is compatitive compatible with other drilling fluid additives, and the lubricity of modified drilling fluids can also be improved effectively. The lubrication mechanism of Chinese yam slurry was discussed through TGA, SEM, FTIR, and contact angle tests.","PeriodicalId":12929,"journal":{"name":"Green Materials","volume":" ","pages":""},"PeriodicalIF":1.9,"publicationDate":"2022-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41830868","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

Incorporation of epoxidized oleic acid plasticizer into poly(vinylidenefluoride) 环氧化油酸增塑剂掺入聚偏氟乙烯

IF 1.9 4区材料科学

Green Materials Pub Date : 2022-05-11 DOI: 10.1680/jgrma.21.00078

W. Zulkifli, A. Hazmi, Z. Idris

引用次数: 0