Journal of Energy Storage
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2024
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IF 8.9
Tao Zhang,Kunbin Kuang,Lilai Lu,Qingshan Li,Yuanna Sun,He Miao
As flexible electronics continue to develop, the demand for low-cost, high-security, and long-lasting deformable energy sources is imperative. Gel-based zinc-air batteries have received much attention as promising candidates due to the flexibility, while most hydrogel electrolytes will lose their deformability after absorbing alkaline electrolyte. Thus, PANa-BC (Bacterial Cellulose) gel electrolytes, with internal physical entanglement of PANa and BC fibers and hydrogen bonding interactions, are prepared by solution copolymerization and swelling. The hydrogel exhibits superior mechanical strength and toughness, as well as convincing ionic conductivity. After optimizing the battery structure and catalyst ratios, the hydrogel-based bendable zinc-air battery delivers the power density of 49 mWcm −2 , high specific capacity (726.6 mAhg −1 ) and stable cycle performance. As expected, the battery shows stable electrochemical properties over a wide range of bending angles, suggesting their high desirability as wearable power sources.
研究领域:
材料科学
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能源技术
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2019
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IF 3.131
Binqiang Xie,Xianbin Zhang,Yagang Li,Wei Liu,Mingwang Luo
In deepwater drilling, rheological properties of water-base drilling fluids (WBDF) varied remarkably within the wide temperatures range, causing problems including equivalent circulating densities control, lost circulation, etc. To solve these problems, the key was how to reduce the temperature dependence of rheological properties. In this study, the combination of thermo-sensitive polymer and clay particles was used to solve this problem due to the distinct thermo-rheological properties of these two components. In detail, a novel thermo-sensitive copolymer (PANA) of acrylamide (AM), sodium 2-acrylamido-2-methylpropane sulfonate (NaAMPS) and N-vinylcaprolactam (NVCL) was synthesized by free radical polymerization under optimal conditions. And the structure of PANA was characterized by FTIR, elemental analysis , and gel permeation chromatographic measurements. The thermo-rheological properties of PANA in solution and slurry were investigated through viscometer . Results from rheological tests illustrated that PANA showed certain thermo-thickening phenomenon in the temperature range of 4–95 °C due to the thermo-associative behavior of thermo-responsive caprolactam (CL) moieties. And the temperature dependence of rheology of PANA based drilling fluids was further studied over the temperature range of 4–75 °C according to the American Petroleum Institute (API) standard. Results illustrated that the rheology of PANA based fluids were found to be more stable than those of typical WBDF. The change rate of main rheological parameters of PANA fluids, such as, apparent viscosity (AV), yield value (YP), and low shear rate viscosity (LSRV), was less than 15%, while parameters of typical WBDFs varied dramatically (near or over 30%). Therefore, the relatively stable rheological properties of fluids with temperature changes could be achieved through the synergistic effect between the novel thermo-sensitive copolymer and bentonite particles. In addition, the rheological control mechanism of PANA was further investigated through transmittance tests, Environmental Scanning Electron Microscope (ESEM), zeta potential experiments, and particle size distribution measurements.
研究领域:
材料科学
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石油工程
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DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2022
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IF 9.136
Yankang Deng,Miaomiao Zhu,Tao Lu,Qingwei Fan,Wenjing Ma,Xiaoli Zhang,Long Chen,Huihua Min,Ranhua Xiong,Chaobo Huang
Air pollution has seriously affected human health and the atmospheric environment. Preparation of fiber membrane with hierarchical structure provides an advanced method for high-performance air filtration. However, indistinctive secondary structure and complicated preparation present constantly in the formation of fiber with hierarchical structure, inevitably limited in the application of air filtration. In this work, a typical granular-convex structure was created in the surface of thermal-crosslinked sodium phytate/polyvinyl alcohol (T-PANa/PVA) fiber via green preparation. Unique secondary structure endowed fiber with efficient physical interception and polar adsorption, which exhibited excellent the removal of air pollutants (removal of PM 2.5 high than 99.9% while low air resistance of 36.5 Pa). In addition, due to the exist of crosslinked network, T-PANa/PVA fiber membrane expresses water-resistant and mechanical properties . This work provides a positive strategy to fabricate hierarchical fiber membranes via green preparation for high-performance air filtration, which is expected to substitute traditional air filtration materials and adapt to the sustainable development of future.
研究领域:
环境科学
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材料科学
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纳米技术
✓ 已验证
DOI
高影响因子
ENVIRONMENTAL SCIENCE & TECHNOLOGY
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2024
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IF 10.8
Lifang Zhang,Wenting Yuan,Wangchao Zhao,Bo Yang,Xiaoqiao Jiao,Li Zhou,Shiqian Long,Jiwen Xu,Weilin Huang,Chenglin Liu,Guomao Zheng,Huizhong Shen,Jianhuai Ye,Lei Zhu,Tzung-May Fu,Xin Yang,Chen Wang
Carcinogenic nitrosamines have been widely studied due to their risk to human health. However, the universality and evolutionary processes of their generation, particularly concerning their secondary sources, remain unclear at present. We demonstrated through laboratory flow tube experiments that corresponding nitrosamines were generated from heterogeneous reactions of nitrous acid (HONO) with five structurally diverse amines commonly found indoors, including diphenylamine (DPhA), dibenzylamine (DBzA), dioctylamine (DOtA), N-(1,3-dimethylbutyl)-N′-phenyl-p-phenylenediamine (6PPD), and N-phenyl-1-naphthylamine (PANA). The heterogeneous reaction rate constants of DBzA and DOtA with HONO (∼70 ppb) were 1.21 × 10–3 and 2.13 × 10–3 min–1 at 30% relative humidity (RH), resulting in a lifetime of 13.8 and 7.8 h. As compared to higher RH (∼80%), more nitrosamines were produced from the reaction of HONO with surface-sorbed DBzA, DOtA, 6PPD, and PANA at lower RH (30%), with product yields ranging from <0.1% to 0.5%. Furthermore, we observed the formation of nitroso-6PPDs and nitro-6PPDs during room air exposure of 6PPD in a genuine indoor environment, in addition to various other transformation products indicative of reactions of 6PPD with HONO, NOx, and ozone indoors. This study confirmed the universality of the heterogeneous reaction of surface-sorbed amine with HONO as a source of nitrosamines indoors.
研究领域:
环境化学
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室内空气质量
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大气科学
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化学工程
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产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）