Polymers
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2025
·Vol. 17
·期 10
·1365
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IF 4.9
Wei Li,Yang Ming,Libing Yang,Yimeng Ni,Yu Chen,Weidong Xu,Lefei Li,Chan Zheng,Wanyang Lin
Hydrogels with conductive properties hold significant promise in the realm of flexible electronics, owing to their pliability, outstanding conductivity, and diverse functionalities. Nevertheless, the majority of conductive hydrogels are prone to being brittle and easily damaged; as such, they are not adapt to cold environments, which seriously hinders their practical applications. Therefore, hydrogels that possess both conductivity and anti-freezing, as well as moisturizing, capabilities have garnered considerable interest, and these hydrogels can work stably in harsh environments. Phytic acid (PA), which mainly exists in plant seeds, is a kind of natural compound widely existing in nature that can be recycled; it provides electrical conductivity and anti-freezing to hydrogels. Here, a highly conductive hydrogel with excellent anti-freezing and moisturizing capabilities was prepared by incorporating PA into a polyacrylamide/gelatin hydrogel. The incorporation of PA endowed the hydrogel with an excellent conductivity of 5.8 S·cm−1. In addition, robust hydrogen bonding was formed between water and phytic acid molecules, and the hydrogel demonstrated remarkable anti-freezing and water retention. On this basis, hydrogels can be used for human winter sports sensing and low-temperature environmental alarm devices to provide faster rescue. This study provides a novel method for the development of hydrogels with low-temperature stability, and provides a revelation for the application of anti-freezing hydrogels in icy and snowy environments.
研究领域:
材料科学
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生物医学工程
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产品关联
DOI
PubMed
高影响因子
Device
·
2025
·
IF 8
Xueqing Yang,Junwei Liu,Zhihua Zhou,Yan Liang,Junjiang Wu,Saimeng Li,Dexia Han,Yahui Du,Zhiling Guo,Yu Chen,Long Ye,Jinyue Yan
Summary The efficiency and longevity of photovoltaics (PV) are sensitive to high operation temperatures, while their operational reliability can be compromised under winter conditions. Evaporative passive cooling can help control the temperature of PV by using hydrogels as water-rich materials. However, the lack of clear design principles and the uncertainty in ensuring the winter performance of PV in mid-to-high-latitude regions remain critical gaps. In this work, we establish the design principles for hydrogels with efficient and sustained evaporative cooling capabilities and demonstrate their application in enhancing PV performance across all seasons. The developed polyacrylamide (PAM) hydrogels can deliver a maximum temperature drop of ∼27°C and a peak cooling power of 612 W/m 2 for PV heat dissipation. The developed hydrogels can alleviate snow accumulation and accelerate snow melting of PV panels in winter via vapor adsorption.
研究领域:
能源工程
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材料科学
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热力学
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可再生能源
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产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2025
·
IF 2.8
Xinpeng Lv,Qiwei Zhang,Ze Li,Kai Gong,Bing Gao,Hongqiu Wei,Peng Li
Conductive hydrogels are promising for flexible electronic device applications, where strain change is converted to electrical signal responses. However, most reported conductive hydrogels are typically frozen around 0°C and dried out limiting their potential applications. Herein, a highly stretchable ionic conductive hydrogel (ICH) with antifreezing and water retention properties was prepared using a natural polymer-based hydrogel (sodium alginate-co-polyacrylamide) as the matrix material. By introducing highly hydrated salt CaCl 2 and ethylene glycol via a solvent displacement method, the ICH exhibits high ionic conductivity (0.91S/m at 20°C), high transparency (95%), and antifreezing properties (−43°C). Moreover, the optimized ICH achieves a satisfactory sensitivity toward tension strain (gauge factor = 2.58 at 100% strain). Interestingly, a real-time sensing system for wearable motion based on the resulting ICH is well developed by integrating a wireless transmission platform. It is anticipated that such an ICH sensing system will significantly broaden the opportunities for flexible sensor applications.
研究领域:
材料科学
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生物医学工程
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产品关联
DOI
高影响因子
Environmental Chemistry and Ecotoxicology
·
2025
·
IF 8.2
Julong Wang,Yan Gao,Shanshan Yao,Lang Lin,Hengxiang Li,Shan Liu,Rui Hou,Zhijian Jiang,Xiangrong Xu
This study explores the impact of microplastics (MPs) and nanoplastics (NPs) on hepatic lipid metabolism in pearl gentian grouper ( Epinephelus fuscoguttatus ♀ × Epinephelus lanceolatus ♂) during overwintering and elucidates the underlying mechanisms. Fish were exposed to polystyrene (PS) MPs and NPs of varying sizes (5 μm, 500 nm, and 50 nm) for a 15-day exposure period. Histopathological analysis, oxidative stress assessment, and gene expression profiling related to lipid metabolism revealed significant toxic effects on the liver. Results showed that NPs preferentially accumulated in the liver, causing hepatocyte swelling, inflammation, and lipid metabolism disorders. Smaller particle sizes intensified oxidative stress, reduced triglyceride (TG) content, and elevated low-density lipoprotein cholesterol (LDL-C) and total cholesterol (T-CHO) levels. Transcriptomic analysis indicated that MPs and NPs altered the expression of lipid metabolism genes, particularly those in glyceride metabolism and lipolysis pathways, with significant upregulation of PNPLA2 and LIPG ( p < 0.05) under cold stress. This led to excessive energy reserve depletion and hepatic lipid metabolism dysfunction. This study establishes a “environmental stress-gene-metabolism” response model and provides novel insights into the molecular mechanisms by which NPs disrupt lipid homeostasis in aquatic organisms, offering a theoretical basis for understanding the toxicological effects of emerging contaminants.
研究领域:
环境毒理学
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水产生物学
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分子生态学
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脂质代谢
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应激生理学
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产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2022
·
IF 9.965
Yutong Yang,Hao Sun,Chenghao Shi,Yuxuan Liu,Yachong Zhu,Yongming Song
Hydrogels are widely used as sensors in the field of wearable devices. However, the hydrogels were rarely designed to endure the harsh outdoor environment in winter, including extremely low temperature, ultraviolet (UV) radiation and variable humidity. In addition, physical damage is also a challenge for hydrogels. In this study, a self-healing hydrogel with adhesion was prepared as a sensor for winter sports using a one-pot method. Polyvinyl alcohol was used as the hydrogel matrix, providing the hydrogel preferable self-healing properties and adhesion to various surfaces such as porcine skin, metal, glass, and plastic. Lithium chloride was used for the chain entanglement of polyvinyl alcohol, forming a hydrogel with excellent ionic conductivity (24.29 S m −1 at room temperature, 13.45 S m −1 under −18 ℃) to detect human motion and temperature changes. Together with ethylene glycol, lithium chloride also provided successful water retention ability and frost resistance. The hydrogel remained stable after 30 d of storage at room temperature and −18 ℃. Sodium lignosulfonate was introduced to improve the mechanical properties and ultraviolet (UV) resistance of hydrogel, created nearly 100% UV shielding with a thickness of 0.5 mm. These advantages provide great potential to the hydrogel for application in flexible wearable devices for winter sports.
研究领域:
材料科学
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生物医学工程
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传感器技术
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产品关联
DOI
PubMed
高影响因子
Sustainability
·
2021
·Vol. 13
·期 23
·13244
·
IF 3.251
Qing Chen,Honghu Zeng,Yanpeng Liang,Litang Qin,Guangsheng Peng,Liangliang Huang,Xiaohong Song
This study aimed to investigate the removal of β-hexachlorocyclohexane (β-HCH) at realistic concentration levels (10 µg/L) in different plant species in constructed wetlands (Acorus calamus,Canna indica,Thalia dealbata, andPontederia cordata) and the structure of the rhizosphere microbial community response of each group during summer and winter. Results showed that all groups of constructed wetlands had very good decontamination efficiency against β-HCH in water (90.86–98.17%). The species that most efficiently purified β-HCH in water wasA. calamusin summer (98.17%) andC. indicain winter (96.64%). Substrate sorption was found to be the major pathway for β-HCH removal from water in the constructed wetlands. The ability of the wetland plants to absorb and purify β-HCH was limited, andC. indicahad the strongest absorptive capacity among the four plant species. The mean β-HCH removal from the matrix of the planted plants increased by 5.8% compared with that of the control treatment (unplanted plants). The average β-HCH content in the plant rhizosphere substrate was 4.15 µg/kg lower than that in the non-rhizosphere substrate. High-throughput sequencing analysis revealed significant differences (P< 0.05) in the Chao1 and ACE indices of microbes in the substrate of four wetlands during summer and winter. At the genus level, the constructed wetlands with vegetation plantations showed higher microbial abundance than the constructed wetlands without vegetation plantations. In winter, the bacterial community structure of each constructed wetland was quite different, but no dominant flora in the bacterial community structure obviously changed. In summer, the bacterial community structure at the same stage was relatively small. The abundance ofActinobacteriaandSphingomonasremarkably increased over time in summer.Keywords:β-HCH;purification effects;vertical-flow constructed wetlands;bacterial community
研究领域:
环境科学
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生态学
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微生物学
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水处理
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）