私密直播全婐app免费大渔直播,国产av成人无码免费视频,男女同房做爰全过程高潮,国产精品自产拍在线观看

相關鏈接
聯系方式
  • 通信地址:浙江省溫州市龍灣區金聯路1號
  • 郵編:454000
  • 電話:0391-3986910
  • 傳真:
  • Email:qiangcheneric@163.com
當前位置:> 首頁 > 論文著作 > 正文
2018-Chem Mater: General Strategy to Fabricate Strong and Tough Low-Molecular-Weight Gelator-Based Supramolecular Hydrogels with Double Network Structure
作者:Feng Chen, Qiang Chen* and Jie Zheng*, et al.
關鍵字:Supramolecular Hydrogels
論文來源:期刊
具體來源:Chemistry of Materails
發表時間:2018年

Low-molecular-weight gelators (LMWGs)-based supramolecular hydrogels, self-assembled by small molecules via noncovalent interactions, have been recently attracted great attentions due to their unique structure-property relationship and potential applications spanning from functional materials to biomedical devices. Unfortunately, many LMWGs-based supramolecular hydrogels are mechanical weak and can not even be handled by conventional tensile and tearing tests. Here, we propose several design principles to fabricate new LMWG-based hydrogels with a true double-network structure (G4.K+/PDMAAm DN gels), consisting of the supramolecular self-assembly of guanosine, B(OH)3 and KOH as the first, physical G4.K+ network and the covalently cross-linked poly(N, N’-dimethyacrylamide) (PDMAAm) as the second, chemical network. Different from those LMWGs-based supramolecular hydrogels, G4.K+/PDMAAm DN gels exhibit high tensile properties (elastic modulus=0.307 MPa, tensile stress=0.273 MPa, tensile strain=17.62 mm/mm, and work of extension=3.23 MJ/m3) and high toughness (tearing energies=1640 J/m2). Meanwhile, the dynamic, noncovalent bonds in the G4.K+ network can reorganize and reform after being broken, resulting in rapid self-recovery property and excellent fatigue resistance. The stiffness/toughness of G4.K+/PDMAAm DN gels can be recovered by 65%/58% with 1 min resting at room temperature, and the recovery rates are further improved with the increase of temperatures and resting times. Interestingly, G4.K+/PDMAAm DN gels also exhibit UV-triggered luminescence due to the unique G4-quartets structure in G4.K+ supramolecular first network. A new toughening mechanism is proposed to interpret the high strength and toughness of G4.K+/PDMAAm DN gels. We believe that our design principles, along with new G4.K+/PDMAAm DN gel system, will provide a new viewpoint for realizing the tough and strong LMWGs-based gels.

文章鏈接https://pubs.acs.org/doi/10.1021/acs.chemmater.8b00063

主站蜘蛛池模板: 镇雄县| 新晃| 万安县| 安平县| 海淀区| 天全县| 崇明县| 巴南区| 方山县| 莱芜市| 浑源县| 绥宁县| 镇宁| 定西市| 临汾市| 萍乡市| 抚顺市| 民乐县| 浦城县| 黔江区| 内黄县| 吕梁市| 绍兴县| 邹城市| 朝阳县| 文成县| 兴业县| 临沭县| 玉门市| 新昌县| 聊城市| 密云县| 邵阳县| 永善县| 安阳市| 泾源县| 滨海县| 林西县| 德惠市| 永安市| 松桃|