Green Materials最新文献_第6页

Feasibility analysis of new green liquid dielectrics for transformers 新型绿色变压器液体介质的可行性分析

4区材料科学

Green Materials Pub Date : 2023-06-21 DOI: 10.1680/jgrma.23.00038

T Mariprasath, Putha Kishore, M Padmavathi

{"title":"Feasibility analysis of new green liquid dielectrics for transformers","authors":"T Mariprasath, Putha Kishore, M Padmavathi","doi":"10.1680/jgrma.23.00038","DOIUrl":"https://doi.org/10.1680/jgrma.23.00038","url":null,"abstract":"The insulating ingredient of the traditional transformer is a mineral oil with low combustibility and biodegradability. As a result, it is unsuitable for current and future transformer applications. Furthermore, finding fossil fuels is becoming increasingly difficult. As a result of the aforementioned limitations, there is a need to look for a replacement shielding oil. This study analysed the crucial characteristics of two biodegradable oils – namely, olive and palm oils – against worldwide standards. In addition, a 1 kVA transformer was subjected to a load test using olive and palm oils in place of traditional insulating solutions to assess their practical feasibility. The authors also looked into the technical feasibility of making a percentage-based blend. According to study results, vegetable oil is a choice superior to mineral oil for electrical and fire protection. However, the density of vegetable oil is substantially higher than that of mineral oil. As a result, the cooling tube of a transformer must be carefully considered throughout its construction. Vegetable oils also have a higher concentration of lipids with a higher molecular weight. The load test revealed that palm oil performs better than mineral oil and olive oil as a liquid dielectric. Furthermore, palm oil with a higher concentration of mineral oil provides properties superior to those of others.","PeriodicalId":12929,"journal":{"name":"Green Materials","volume":"101 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136355217","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

Properties of agar/cassava starch films manufactured by hot-melt extrusion method 热熔挤压法制备琼脂/木薯淀粉薄膜的性能研究

4区材料科学

Green Materials Pub Date : 2023-06-16 DOI: 10.1680/jgrma.23.00049

Shelly Faradina, Bakti Berlyanto Sedayu, Mokhamad Nur, Dina Fransiska, Firda Aulya Syamani

{"title":"Properties of agar/cassava starch films manufactured by hot-melt extrusion method","authors":"Shelly Faradina, Bakti Berlyanto Sedayu, Mokhamad Nur, Dina Fransiska, Firda Aulya Syamani","doi":"10.1680/jgrma.23.00049","DOIUrl":"https://doi.org/10.1680/jgrma.23.00049","url":null,"abstract":"Agar/cassava starch bioplastic film preparation using the extrusion technique was carried out to obtain a continuous production method that is more applicable to industrial production practices. Various ratios (w/w) of agar-and-cassava-starch blends were used in the bioplastic film formulations with glycerol as the plasticizer. All the ingredients were compounded using a single-screw extruder at 110°C. The extrudates were dried and chopped into bioplastic resin pellets, followed by hot compression into a film sheet. The bioplastic film samples were tested for their mechanical properties, water sensitivity, biodegradability and chemical structures. In general, the amount of agar in film formulations was prominently associated with superior mechanical properties, such as the tensile strength, elongation at break and water resistance of the samples. On the other hand, cassava starch contributed to faster film degradation in soil and water. These results, in general, could be explained by the inherent properties of each biopolymer constituent and the number of hydroxyl groups (OH) in the chemical structure of each film sample, which was observed by Fourier transform infrared spectroscopy. This investigation showed that agar/cassava starch bioplastic production using the hot-melt extrusion method was promising for further implementation on a commercial production scale.","PeriodicalId":12929,"journal":{"name":"Green Materials","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135621091","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

CNSL oxyacetic derivatives, new bio-based binder for paint preparation CNSL氧乙酸衍生物，新型生物基涂料粘合剂

IF 1.9 4区材料科学

Green Materials Pub Date : 2023-06-08 DOI: 10.1680/jgrma.23.00046

Miarintsoa Michaele Ranarijaona, Sandratriniaina Hermann Rafanoela, Lydia Clarisse Herinirina, M. Duclos, Alban Léon Lavaud, Catherine Goux-Henry, E. Métay, Voahangy Ramanandraibe Vestalys, M. Lemaire

{"title":"CNSL oxyacetic derivatives, new bio-based binder for paint preparation","authors":"Miarintsoa Michaele Ranarijaona, Sandratriniaina Hermann Rafanoela, Lydia Clarisse Herinirina, M. Duclos, Alban Léon Lavaud, Catherine Goux-Henry, E. Métay, Voahangy Ramanandraibe Vestalys, M. Lemaire","doi":"10.1680/jgrma.23.00046","DOIUrl":"https://doi.org/10.1680/jgrma.23.00046","url":null,"abstract":"The global coatings industry produces tens of millions of metric tons of paints each year and this quantity continues to grow. Most of them are obtained totally or partially from fossil resources and many of them still use VOCs (Volatile Organic Compounds) and/or other harmful chemicals. We describe in this article, the cashew nut shell liquid as a raw material for paint binder synthesis (sustainable materials). These binders are obtained in a single chemical step without tedious separation. This new bio-based material (renewable resources) formed stable films (green coatings) in a short drying time. Paints formulated are 100% aqueous have low toxicity and ecotoxicity and require no additional drying agents or VOCs. Oxidative coupling of the alkylidene chain and the addition of carboxylic acid to the carbon-carbon double bonds are implemented. The products obtained could be applied on different kind of surfaces such as glass slide, metal, wood or concrete and exhibit good stability against various solvents and tropical conditions.","PeriodicalId":12929,"journal":{"name":"Green Materials","volume":" ","pages":""},"PeriodicalIF":1.9,"publicationDate":"2023-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45017182","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

Sustainable feedstocks for 4D printing: a review of biodegradable polymers and natural resources for stimuli-responsive manufacturing 可持续的4D打印原料:可生物降解聚合物和刺激响应制造的自然资源的回顾

IF 1.9 4区材料科学

Green Materials Pub Date : 2023-06-02 DOI: 10.1680/jgrma.23.00039

Leena V. Bora, Kevin S. Vadaliya, N. Bora

{"title":"Sustainable feedstocks for 4D printing: a review of biodegradable polymers and natural resources for stimuli-responsive manufacturing","authors":"Leena V. Bora, Kevin S. Vadaliya, N. Bora","doi":"10.1680/jgrma.23.00039","DOIUrl":"https://doi.org/10.1680/jgrma.23.00039","url":null,"abstract":"Additive manufacturing (AM), alternatively known as 3D printing is an emerging technology supported by Industry 4.0. When combined with a stimulus-responsive behavior, decorated with the fourth dimension of time, it results in a manufacturing technique known as 4D printing. Although 4D printing technique is currently in its infancy stage, it has attracted exponential rise in attention in last 5 years. 4D printed entities have a distinctive characteristic of property transformation, under the influence of a drafted stimulus, which can be cleverly engineered for the desired application. Currently, 4D printed constructs have been implemented in renewables, textiles, electronics, biomedicals, agriculture, aerospace, purification, etc. and is aggressively growing. The conventional stimuli-driven smart printing inks deployed in 4D printing are non-biodegradable polymers that pose a defiance to sustainability. Hence, it is imperative to appraise the utilization of sustainable raw-materials, comprising of natural and synthetic biodegradable polymers, such as polylactic acid, polyvinyl alcohol, polycaprolactone, etc. as feedstocks for 4D printing. Natural resources, such as carbon, starch, cellulose, alginate, chitosan, collagen, etc. have fluctuating properties, that fortunately make them receptive toward intelligent engineering. This review is an effort towards the implementation of sustainable feedstocks as printing inks for 4D printing, for eventual environmental benignity. It incorporates several sustainable raw materials used for 4D printing and the strategies to use them in conjunction with conventional inks, in order to bring down the volume of non-biodegradables. This article would serve as a reference for designers and engineers wishing to practice sustainable inks for 4D printing, thereby boosting the momentum needed to consolidate this next-generation technology in-line with the sustainable development goals.","PeriodicalId":12929,"journal":{"name":"Green Materials","volume":" ","pages":""},"PeriodicalIF":1.9,"publicationDate":"2023-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45089485","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

Development of biobased poly(ethylene) composites with improved antioxidant properties with coffee by-products coming from the alcoholic beverages industry 利用来自酒精饮料工业的咖啡副产品开发具有改进抗氧化性能的生物基聚乙烯复合材料

IF 1.9 4区材料科学

Green Materials Pub Date : 2023-05-19 DOI: 10.1680/jgrma.22.00084

Enrique Terroba-Delicado, J. Ivorra‐Martinez, J. Gómez-Caturla, L. Sánchez-Nácher, N. Montanes

{"title":"Development of biobased poly(ethylene) composites with improved antioxidant properties with coffee by-products coming from the alcoholic beverages industry","authors":"Enrique Terroba-Delicado, J. Ivorra‐Martinez, J. Gómez-Caturla, L. Sánchez-Nácher, N. Montanes","doi":"10.1680/jgrma.22.00084","DOIUrl":"https://doi.org/10.1680/jgrma.22.00084","url":null,"abstract":"BioHDPE loaded composites with different amounts of spent coffee powder (up to 30 wt.%), were succesfully produced. The use of coffee residues coming from the alcoholic beverage industry into a bioHDPE matrix resulted in a remarkable improvement on the antioxidant properties of composites. Waste spent coffee powder gave reduced the elastic modulus, hardness and storage modulus, which was proportional to the amount of by-product considered. To improve the interaction between the highly hydrophobic BioHDPE matrix and the highy hydrophilic spent coffee powder, a copolymer, namely poly(ethylene-grafted-maleic anhydride) (PE-g-MA) was used. PE-g-MA addition resulted in an improved interaction between the particles and PLA as confirmed by field emission scanning electron microscopy (FESEM). On the other hand, the presence of the lignocellulosic filler resulted in a low load transfer between the two components, which led to a decrease in tensile strength. The introduction of coffee powder provided an improvement in the thermal stability as confirmed by thermogravimetry (TGA) and differential scanning calorimetry (DSC). Finally, antioxidant activity was also observed in the composites, reporting a 27% of DPPH reduction for the highest coffee content composite. The presence of antioxidant substances (coffee oil) was confirmed by Fourier transformed infrared spectroscopy (FTIR).","PeriodicalId":12929,"journal":{"name":"Green Materials","volume":" ","pages":""},"PeriodicalIF":1.9,"publicationDate":"2023-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43359988","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

Biosourced alternatives to diglycidylether of bisphenol A in epoxy-amine thermosets: a focus on materials properties and endocrine activity 环氧胺热固性材料中双酚A二甘油酯的生物源替代品:对材料特性和内分泌活性的关注

IF 1.9 4区材料科学

Green Materials Pub Date : 2023-05-19 DOI: 10.1680/jgrma.23.00027

R. Tavernier, M. Semsarilar, S. Caillol

{"title":"Biosourced alternatives to diglycidylether of bisphenol A in epoxy-amine thermosets: a focus on materials properties and endocrine activity","authors":"R. Tavernier, M. Semsarilar, S. Caillol","doi":"10.1680/jgrma.23.00027","DOIUrl":"https://doi.org/10.1680/jgrma.23.00027","url":null,"abstract":"Since 1940s, bisphenol A (BPA) has been used in plastic industry reaching production of 10 million tons in 2022. More than 30 % of the produced BPA is used in the production of epoxy resins. Decades of research has now provided enough evidence that (BPA) has endocrine disrupting activity. Hence, it is an urgent matter to replace the use of BPA in production of epoxy resins. In the past years, considerable effort have been put into finding alternatives to the toxic BPA. However, the diglycidylether bisphenol A (DGEBA) does not only exhibits high polymerization reactivity, but the presence of aromatic rings confers interesting thermos-mechanical resistance to epoxy networks therefrom. Hence, this properties are also expected from potential alternatives to BPA. In this review, first the elements leading to toxicity of BPA is explained and then a thorough account of possible bio-sourced aromatic alternatives to BPA are gathered. The reported synthetic routes to each of these alternatives and their toxicity are described. Also, their use in synthesis of epoxy resins and how the new alternatives influence the mechanical properties are discussed. This is a concise summary of the structure-property and structure-toxicity relationship for possible bio-sourced substitutes of BPA in synthesis of epoxy resins.","PeriodicalId":12929,"journal":{"name":"Green Materials","volume":" ","pages":""},"PeriodicalIF":1.9,"publicationDate":"2023-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48803921","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

Preparation and properties of rosin-based naphthalene fluorescent polyurethane 松香基萘荧光聚氨酯的制备及性能

IF 1.9 4区材料科学

Green Materials Pub Date : 2023-05-15 DOI: 10.1680/jgrma.23.00031

Jian-Feng Xu, Chengfei Yan, Guangjie Lu, Caili Yu, F. Zhang

{"title":"Preparation and properties of rosin-based naphthalene fluorescent polyurethane","authors":"Jian-Feng Xu, Chengfei Yan, Guangjie Lu, Caili Yu, F. Zhang","doi":"10.1680/jgrma.23.00031","DOIUrl":"https://doi.org/10.1680/jgrma.23.00031","url":null,"abstract":"Fluorescent polyurethanes (FPU) have been widely used in coatings, temperature recognition, fluorescent probes, and other fields because of their diverse structures and properties. Unfortunately, most FPUs are currently produced from petroleum-based products. Herein, a thermoplastic rosin-based naphthalene FPU was prepared by using the biobased ester of acrylic rosin and glycidyl methacrylate, polycaprolactone, 1, 5-dihydroxy naphthalene (1, 5-DN) and isophorone diisocyanate as the raw materials. The structure of FPU was confirmed by proton nuclear magnetic resonance (1H NMR) and Fourier transform infrared spectroscopy (FTIR). In addition, thermal performance analysis (TGA, DSC) and water contact angle analysis (WCA) showed that the addition of 1, 5-DN improved the thermal stability and hydrophobicity of FPU. More importantly, FPU exhibited good fluorescence performance in both liquid and solid states, and the fluorescence intensity increased with increasing temperature. Both aniline and trichloromethane showed effective fluorescence quenching for FPU. Therefore, FPU is a promising material for applications in temperature recognition and fluorescence probes.","PeriodicalId":12929,"journal":{"name":"Green Materials","volume":" ","pages":""},"PeriodicalIF":1.9,"publicationDate":"2023-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42791212","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

The effect of phosphorus based flame retardants on the thermal and fire retardant properties of chicken feather/thermoplastic polyurethane composites 磷基阻燃剂对鸡毛/热塑性聚氨酯复合材料热阻性能的影响

IF 1.9 4区材料科学

Green Materials Pub Date : 2023-05-12 DOI: 10.1680/jgrma.23.00008

Aysenur Mutlu, M. Doğan

引用次数: 1

The effect of lignin-based polyols on the properties of polyurethane coatings 木质素基多元醇对聚氨酯涂料性能的影响

IF 1.9 4区材料科学

Green Materials Pub Date : 2023-05-05 DOI: 10.1680/jgrma.23.00040

Fatemeh Farhood Hassani Khorshidi, S. Najafi, F. Najafi, A. Pizzi, D. Sandberg, R. Behrooz

{"title":"The effect of lignin-based polyols on the properties of polyurethane coatings","authors":"Fatemeh Farhood Hassani Khorshidi, S. Najafi, F. Najafi, A. Pizzi, D. Sandberg, R. Behrooz","doi":"10.1680/jgrma.23.00040","DOIUrl":"https://doi.org/10.1680/jgrma.23.00040","url":null,"abstract":"The aim of this research was to replace petroleum-based polyols with polyols made from lignin and nano-lignin in the production of polyurethane coatings. Lignin and nano-lignin were first reacted with either diethylenetriamine (DETA) or ethylenediamine (EDA). Subsequently, they were modified with propylene carbonate. The lignin and nano-lignin derived polyols replaced the conventional polyol-acrylic in the production of polyurethane coatings. The results of FTIR analysis showed that urethane, isothiocyanate, and strong C-N bonds were formed in nano-lignin-based polyurethanes. Moreover, the surface-adhesion test of the lignin-based polyurethane coating showed that by increasing the lignin content, the adhesion strength of the coating decreased. Mixing lignin nanoparticles in the polyurethane substrate caused the adhesion strength to rise from 1.67 MPa to 4.52 MPa. An increase of amino nano-lignin content up to 7% of oil based polyol improved the curing of the coating and increased the scratch resistance to more than 5 Kg. The results showed that lignin from a mechanical pulping process has a direct effect on reducing the smoothness and the glossiness in polyurethane coatings.","PeriodicalId":12929,"journal":{"name":"Green Materials","volume":" ","pages":""},"PeriodicalIF":1.9,"publicationDate":"2023-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48617655","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

Automated trackspinning of highly oriented, ultrafine lignin fibers as precursors for green carbon nanofibers 高取向、超细木质素纤维作为绿色纳米碳纤维前驱体的自动跟踪纺丝

IF 1.9 4区材料科学

Green Materials Pub Date : 2023-05-04 DOI: 10.1680/jgrma.23.00037

Dave Jao, Abigail Heinz, J. Stanzione, V. Beachley

{"title":"Automated trackspinning of highly oriented, ultrafine lignin fibers as precursors for green carbon nanofibers","authors":"Dave Jao, Abigail Heinz, J. Stanzione, V. Beachley","doi":"10.1680/jgrma.23.00037","DOIUrl":"https://doi.org/10.1680/jgrma.23.00037","url":null,"abstract":"At present, most carbon fibers are made from non-renewable polyacrylonitrile (PAN). Substantial efforts have been made to replace the need for petroleum-based precursors for carbon fiber production. Interestingly, lignin is a carbon fiber precursor material that is cheap, highly available, and sustainable. Sub-micron scale lignin-based carbon nanofibers could find use in numerous areas, such as electronic devices, batteries, supercapacitors, and low-cost, high performance structural composite materials. Trackspinning (TS) technology offers a way scale the versatile, but inefficient mechanical pulling technique to produce small diameter lignin fibers from environmentally friendly aqueous solutions. In this study, the effects of track spinning based on probe drawing of low concentration lignin nanofibers blended with polyethylene oxide (PEO) and glycerol in sodium hydroxide (NaOH) solution were investigated. TS lignin fibers were well aligned and reached diameters as low as 500-1000 nm as the drawing length was increased. Lignin fiber macromolecular alignment was isotropic at low levels of draw and dichroic ratio was increased from 1 to 2.25 by doubling the drawing length. The most highly drawn track-spun lignin fibers had a mechanical strength of 3.92 MPa and a Young’s Modulus of 2.15 GPa, which were similar to reported values for solvent electrospun lignin nanofibers. These findings support the potential to utilize TS to produce small diameter lignin fibers using a simple aqueous solvent approach.","PeriodicalId":12929,"journal":{"name":"Green Materials","volume":"1 1","pages":""},"PeriodicalIF":1.9,"publicationDate":"2023-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41513295","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