FUEL
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2021
·
IF 6.609
Teng Chen,Xin Xu,Jianqiang Hu,Li Guo,Shizhao Yang,Tianxiang Zhao,Jun Ma
Water contamination in aviation jet fuel has been a particular concern throughout the aviation industry for many decades on account of any contaminating water may accelerate the corrosion of the aircraft fuel systems, diminish the lubricative properties of the fuel, promote microorganism growth, and more importantly, pose threat to flight safety. However, the water behavior of jet fuel has not been studied systematically so far, especially for the free water, which is the main factor that causes the hazards mentioned above. Herein, the water behaviors, including dissolved and free water behaviors versus storage time, temperature, relative humidity and anti-icing agent are investigated. Compared with storage time, temperature and relative humidity have a greater influence on the water solubility, and the respective exponential and linear relationships between the solubility of water and temperature and relative humidity are identified in this paper. Furthermore, a complete discussion is carried out on the effect of anti-icing agent on the solubility of water and free water content in jet fuel. More importantly, the real water behavior of jet fuel with anti-icing agent is also studied through simulating the variation in temperature during flight.
研究领域:
航空工程
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化学工程
✓ 已验证
DOI
高影响因子
Materials Research Express
·
2019
·Vol. 6
·期 9
·095704
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IF 1.449
Meng Xia,Shenxin Pan,Yujie Sun,Qiuzhu Luo,Zhengping Fang,Peixin He,Jing Fu,Yuhong Zhang
As a new generation of smart materials, poly(N-isopropylacrylamide) (PNIPAM) is studied for its wettability transition mechanism, which is necessary for the development of the next generation of wettability transition materials. Herein, we minutely report the effects of temperature on the wettability of solid-oil-water and solid-water-air interfaces for the first time. The PNIPAM hydrogel surface (PHS) became less hydrophilic and less lipophobic with the temperature increasing, and the sharply changes in wettability occur range from 28 °C to 32 °C. Furthermore, unlike previous assumptions, our data about resonance Raman spectroscopy and molecular dynamics simulation suggest that dehydration of isopropyl is more likely to be a cause of drastic changes in wettability. This study suggests a novel foundation to comprehend the wetting behavior of smart PNIPAM gelation surface.
研究领域:
材料科学
·
生物医学工程
✓ 已验证
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2024
·
IF 4.9
Huayong Luo,Shiyin Li,Zirong Xu,Hongwei Rong,Qingwu Long
To explore a simple and energy-efficient approach to regenerate draw agent is a key challenge for forward osmosis (FO) desalination. Electro-responsive hydrogels have attracted great attention due to their reversible swelling-shrinking behaviors under an electric stimulus. However, the developed electro-sensitive hydrogels based on 2-acrylamido-2-methyl-l-propanesulfonic acid (AMPS) so far exhibit low reusability due to their unstable electro-sensitive properties and poor degradability with potential environmental impact. This study explored the use of an electro-responsive superabsorbent hydrogel as a draw agent by grafting acrylic acid (AA) and acrylamide (AM) onto sodium carboxymethyl cellulose (CMC). The grafted hydrogel’s morphology and structure were investigated by FTIR and SEM. The swelling behaviors and deswelling properties in an electrode contact system were examined. The swelling kinetics of the hydrogel could be well described by the Schott's pseudo-second-order model with a theoretical swelling ratio of 452.5 g/g. The grafted hydrogel exhibited stable electro-sensitive characteristics with a decrease of 7.3 % in the equilibrium swelling ratio after undergoing three cycles of deswelling and swelling. During the FO test, the dry hydrogel particles produced a water flux of 1.55 L·m −2 ·h −1 within the first hour, surpassing the performance of other carboxylic acid-based hydrogels used as draw agents. Significantly, it exhibited encouraging water recovery capabilities in the five recycling FO processes, retaining around 84 % of its initial water recovery ratio after 40 min of exposure to a voltage of 15 V. This indicated that the grafted hydrogel could be considered as an effective and sustainable draw agent for FO desalination.
研究领域:
材料科学
·
环境工程
·
水处理
✓ 已验证
产品关联
DOI
高影响因子
Scientific Reports
·
2024
·
IF 3.8
Liqing Zhu,Fenfen Ouyang,Xue Fu,Yimei Wang,Ting Li,Min Wen,Guodong Zha,Xue Yang
Natural polymer-based hydrogels have demonstrated great potential as wound-healing dressings. They help to maintain a moist wound environment as well as promote faster healing. In this work, a multifunctional hydrogel was prepared using keratin, sodium alginate, and carboxymethyl chitosan with tannic acid modification. Micro-morphology of hydrogels has been performed by scanning electron microscopy. Fourier Transform Infrared Spectroscopy reveals the presence of hydrogen bonding. The mechanical properties of the hydrogels were examined using a universal testing machine. Furthermore, we investigated several properties of the modified hydrogel. These properties include swelling rate, water retention, anti-freezing properties, antimicrobial and antioxidant properties, hemocompatibility evaluation and cell viability test in vitro. The modified hydrogel has a three-dimensional microporous structure, the swelling rate was 1541.7%, the elastic modulus was 589.74 kPa, the toughness was 211.74 kJ/m 3 , and the elongation at break was 75.39%, which was similar to the human skin modulus. The modified hydrogel also showed inhibition of S. aureus and E. coli , as well as a DPPH scavenging rate of 95%. In addition, the modified hydrogels have good biological characteristics. Based on these findings, the K/SA/CCS hydrogel holds promise for applications in biomedical engineering.
研究领域:
生物医学工程
·
材料科学
·
伤口愈合
·
生物材料
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMOSPHERE
·
2016
·
IF 3.698
Yanli Ma,Yajie Sun,Yujie Fu,Guizhen Fang,Xingru Yan,Zhanhu Guo
Supramolecular cross-linked porous lignin based poly (acrylic acid) [LBPAA] was lab-synthesized by copolymerizing lignin grafted N, N'-methylene-bisacrylamide (LM) and acrylic acid . LBPAA successfully acted as a water retention agent with salt resistance and biodegradation for agricultural applications. Lignin was found to improve its swelling behaviors with higher water retention, fast swelling and de-swelling rates. The salt tolerance was stronger in the case of LBPAA (60 PAA/40 LM) [60 wt% PAA/40 wt% LM], i.e., 145.79 g·g −1 higher than PAA at 0.09 mM KCl solution. The effect of ion charges on the LBPAA swelling ratio was greater than that of ionic radius. The weight loss of LBPAA (60 PAA/40 LM) was 5.47%, 4.96%, and 4.56% in the soil of Tangshan, Harbin, and Sian, respectively. The soil moisture content and clay content were observed to decrease gradually with increasing the burial time. The biodegradation test of LBPAA (60 PAA/40 LM) composite exhibited different bacterial colony forming units (CFU), the soil of Tangshan was 2.0 × 10 3 CFU·g −1 soil, 7.0 × 10 3 CFU·g −1 soil for Harbin, and 6.10 × 10 4 CFU·g −1 soil for Sian. However, the organic matter contents in the soils did not have significant changes (Tangshan 6.21 mg·g −1 , Harbin 0.61 mg·g −1 , and Sian 0.405 mg·g −1 ).
研究领域:
材料科学
·
环境科学
·
农业
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Polymer Materials
·
2024
·
IF 4.4
Liang Zhang,Chao Nie,Yi Zhang,Chuan-Chuan Liu,Hui Jiang,Ling-Hu Cai,Yao Xiao,Rong Li,Ming-Hua Liu
After a nuclear accident, radioactive nuclides are rapidly absorbed through wounds into the body, causing serious internal radiation injury. In this study, we synthesized chitosan methacryloyl (CSMA) and graft-modified it with the broad-spectrum chelating agent diethylenetriamine pentaacetate (DTPA) to prepare a DTPA-modified chitosan hydrogel dressing (CSMA-g-DTPA). The compounds and hydrogels were examined for their physical and chemical properties and their biological safety was verified. The effectiveness of CSMA-g-DTPA dressings for early decontamination and promotion of wound healing was evaluated in vivo. The results indicated that CSMA-g-DTPA exhibits good mechanical properties and swelling behavior as well as excellent biocompatibility. In vitro experiments revealed that CSMA-g-DTPA is capable of removing uranium and strontium. In vivo experiments demonstrated that the CSMA-g-DTPA hydrogel can decontaminate radioactive Sr-89 and U-238 from rat skin wounds, prevent the absorption of Sr-89 and U-238 through the wounds and alleviate oxidative stress and inflammatory responses in the wounds, thereby promoting wound healing. Overall, the DTPA-modified chitosan hydrogel dressing has good mechanical performance, biosafety and decontamination effects on strontium and uranium. It has potential applications for emergency decontamination of wounds during the early stages of a nuclear disaster.
研究领域:
材料科学
·
生物医学工程
·
辐射防护
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伤口愈合
·
核医学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）