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| 1 | Stimuli-Responsive Polypeptide-Based Supramolecular Hydrogels Mediated by Ca^2+ Ion Cross-Linking显示文摘Background and Originality Content Hydrogels,which retain a large amount of water,possess tunable porous three-dimensional nanostructure.They are known to resemble human tissue that can offer many advantages in biomedical applications such as tissue engineering,drug delivery and surgical dressings.1141 Stimuli-responsive hydrogels,referred as smart hydrogels can rapidly respond in a controlled manner to external stimuli,such as temperature,pH,light,etc.[s]In particular,the thermal-responsive hydrogels exhibit sol-to-gel phase transition upon heating up to lower critical gelation temperatures(CGTs). | Fandong Meng Jing Sun Zhibo Li | 2019 | Chinese Journal of Chemistry2019，37，11： | 5 |
| 2 | Superhydrophobic Flexible Supercapacitors Formed by Integrating Hydrogel with Functional Carbon Nanomaterials显示文摘With the rapid development of the wearable electronics,the flexible supercapacitor with high energy density has attracted more and more attentions.From the viewpoint of outdoor and underwater application,this research tried to impart the superhydrophobicity to the flexible supercapacitors.The polyvinyl alcohol/HN0_(3) hydrogel was utilized as the electrolyte,which could achieve self-healing capability without the freezing/thawing process.Both microscale graphene and nanoscale carbon nanotubes were utilized as the electrode materials.After surface modification,the hydrophobic suspension composed of graphene and carbon nanotubes was sprayed onto the two sides of hydrogel electrolyte to construct superhydrophobic electrode.Hence,the superhydrophobicity endows the supercapacitor with outstanding self-cleaning performance.The all-in-one structure endows the supercapacitor with improved capacitive ability,outstanding flexibility,good anti-abrasion property,and reliable self-healing capability.The combination of superhydro-phobicity and flexible energy storage might have a broad application for the outdoor and underwater wearable electronics applications. | Peng Wang Ximin Zhang Wei Duan Wei Teng Yibing Liu Qing Xie | 2021 | Chinese Journal of Chemistry2021，39，5： | 4 |
| 3 | Reinforcement of Self-Healing Polyacrylic Acid Hydrogel with Acrylamide Modified Microcrystalline Cellulose显示文摘Self-healing hydrogel such as polyacrylic acid(PAA)hydrogel has attracted increasing attention based on its promising potential applications.However,it usually suffers from low strength especially as mechanical device.Herein,a commercial microcrystalline cellulose(MCC)was modified with acrylamide to graft polyacrylamide(PAM)chains on the particle surface.The acrylamide-modified MCC(AM-MCC)was then dispersed in monomer solution of acrylic acid to prepare composite hydrogel.The mechanical properties of the obtained composite hydrogels and the self-healed hydrogels were carefully measured by compressive and tensile tests,and by dynamic mechanical analysis.Our results demonstrate that introduction of a small amount of AM-MCC such as 3 wt%can not only reinforce the original hydrogel and the healed hydrogel markedly,but also improve self-healing efficiency obviously.The analyses indicate that in addition to the reversible multi-interactions such as hydrogen bonding and ionic interactions,the entanglements between the PAA chains of the hydrogel matrix and the PAM chains grafted on the MCC particles have also played an important role on the improvement in mechanical performances and the healing ability of the hydrogel.Moreover,the responsiveness to exterior ion has been tested to indicate potential application of the composite hydrogel as self-healable sensor. | Changzhuang Bai Qiuhua Huang Xiaopeng Xiong | 2020 | Chinese Journal of Chemistry2020，38，5： | 3 |
| 4 | Hofmeister Effect-Assisted Strong Natural Biopolymer-Based Hydrogels with Multi-Functions显示文摘Natural biopolymer-based hydrogels have been extensively studied in recent years due to their excellent biocompatibility.However,the preparation of multi-functional and tough natural biopolymer-based hydrogels is still a challenging problem.Herein,a natural biopolymer-based hydrogel is prepared using gelatin and carboxymethyl chitosan(CMCS)through a one-step soaking method.The prepared hydrogel without any synthetic polymers and crosslinking agents has a fully physical crosslinking structure.Due to the hydrophobic interaction brought by the Hofmeister effect,the mechanical properties of soaked hydrogels(tensile stress and strain can reach 3.77 MPa and 1082%)are superior to conventional protein hydrogels.In addition,the prepared gelatin/carboxymethyl chitosan(Gel/CMCS)hydrogels exhibit a variety of appealing properties,including good shape memory,fatigue resistance,electrical conductivity,water retention,drug releasing,antibacterial property,and recyclability.This strategy opens up a new horizon to fabricate hydrogels with excellent mechanical properties and multiple functions,which can extend their applications in the biomedicine area and other related fields. | Yaqian Cai Jiachuan Shi Fangzhe Liu Haichao Li Xinya Man Shuang Guan | 2021 | Chinese Journal of Chemistry2021，39，11： | 3 |
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