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Enhanced adsorption of Methylene Blue from aqueous solution by chitosan-g-poly(acrylic acid)/vermiculite hydrogel composites

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Journal of Environmental Sciences 2010年第4期22卷 486-493页

作者： Yi Liu Yian Zheng Aiqin Wang Center of Eco-material and Green Chemistry Lanzhou Institute of Chemical Physics Chinese Academy of Sciences Lanzhou 730000 China Graduate University of the Chinese Academy of Sciences Beijing 100049 China

A series of chitosan-g-poly （acrylic acid）/vermiculite hydrogel composites were synthesized and used as adsorbents for the investigation of the effect of process parameters such as vermiculite content, pH of dye solution, contact time, initial concentration of dye solution, temperature, ionic strength and concentration of surfactant sodium dodecyl sulfate on the removal of Methylene Blue （MB） from aqueous solution. The results showed that the adsorption capacity for dye increased with increasing pH, contact time and initial dye concentration, but decreased with increasing temperature, ionic strength and sodium dodecyl sulfate concentration in the present of the surfactant. The adsorption kinetics of MB onto the hydrogel composite followed pseudo second-order kinetics and the adsorption equilibrium data obeyed Langmuir isotherm. By introducing 10 wt.% vermiculite into chitosan-g-poly （acrylic acid） polymeric network, the obtaining hydrogel composite showed the highest adsorption capacity for MB, and then could be regarded as a potential adsorbent for cationic dye removal in a wastewater treatment process.

关键词： hydrogel composites vermiculite Methylene Blue adsorption kinetics adsorption isotherms

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3D-printable Boron Nitride/Polyacrylic hydrogel composites with High Thermal Conductivities

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Journal of Wuhan University of Technology(Materials Science) 2024年第5期39卷 1303-1310页

作者： DAI Jialei XUE Bingyu QIAN Qi HE Wenhao ZHU Chenglong LEI Liwen WANG Kun XIE Jingjing Hubei Longzhong Laboratory Xiangyang 441000China School of Materials Science and Engineering Wuhan University of TechnologyWuhan 430070China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China

Polyacrylic acid(PAA)hydrogel composites with different hexagonal boron nitride(h-BN)fillers were synthesized and successfully 3D-printed while their thermal conductivity was systematically *** the content of h-BN increasing from 0.1 wt%to 0.3 wt%,the thermal conductivity of the 3D-printed composites has been ***,through the shear force given by the 3D printer,a complete thermal conductivity path is obtained inside the hydrogel,which significantly improves the thermal conductivity of the h-BN hydrogel *** maximum thermal conductivity is 0.8808 W/(m·K),leading to a thermal conductive enhancement of 1000%,compared with the thermal conductivity of pure PAA *** study shows that using h-BN fillers can effectively and significantly improve the thermal conductivity of hydrogelbased materials while its 3D-printable ability has been maintained.

关键词： hydrogel composites boron nitride 3D printing thermal conductivity

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Recent advances in self-healing hydrogel composites for flexible wearable electronic devices

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Nano Research Energy 2024年第3期3卷 160-189页

作者： Xihan Tan Kaibin Chu Zhijie Chen Ning Han Xueliang Zhang Hongwei Pan Wei Guo Guoxing Chen Bing-Jie Ni Zhenyu Zhou Hui Song Department of Chemistry and Chemical Engineering Lyuliang UniversityLvliang 033001China School of Materials Science and Engineering Linyi UniversityLinyi 276000China School of Civil and Environmental Engineering The University of New South WalesSydneyNSW 2052Australia Department of Materials Engineering KU LeuvenKasteelpark Arenberg 44Leuven 3001Belgium Fraunhofer Research Institution for Materials Recycling and Resource Strategies IWKS AlzenauGermany

Flexible electronic devices with mechanical properties like the soft tissues of human organs have great potential for the next generation of wearable and implantable electronic ***-healing hydrogel composites typically have high tensile strength,high electrical conductivity and damage repair properties and have wide applications in flexible electronics,such as human-computer interaction,health detection and soft *** self-healing hydrogel composites have been developed to produce new stretchable conductive materials with satisfactory mechanical and selfhealing *** paper presents the fabrication of self-healing hydrogel composites and their application in flexible electronic ***,the repair mechanism of physically cross-linked and chemically cross-linked self-healing hydrogel composites is ***,self-healing double network hydrogels,self-healing nanocomposite hydrogels and double crosslinked self-healing hydrogel composites and their applications in flexible sensors,energy harvesting devices,energy storage devices and optical devices are presented and ***,the challenges and prospects of self-healing hydrogel composites in flexible electronic devices in the future are presented.

关键词： hydrogel composites self-healing property repair mechanism network structures wearable electronic devices

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