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Mechanically Strong and Highly Stiff Supramolecular Polymer Composites Repairable at Ambient Conditions
CCS Chemistry ( IF 9.4 ) Pub Date : 2020/2/26 , DOI: 10.31635/ccschem.020.201900118
Jingjing Zhu 1 , George Y. Chen 2 , Li Yu 3 , Haolan Xu 4 , Xiaokong Liu 1 , Junqi Sun 1
Affiliation  

It is a formidable challenge to fabricate healable polymeric materials with high mechanical strength and stiffness due to the highly suppressed diffusion of their polymer chains. Herein, a high-strength, highly stiff, and repairable/healable supramolecular polymer composite was fabricated by complexing poly(acrylic acid) (PAA) and poly(allylamine hydrochloride) (PAH) in aqueous solutions, followed by molding into desired shapes. Exquisitely tuning the electrostatic and H-bonding interactions between PAA and PAH led to associative phase-separation and in situ formation of nanostructures in the resultant PAA–PAH composites. The H-bonded assembly of PAA–PAH complexes existed as nanospheres were dispersed homogeneously in the continuous phase as an electrostatic assembly of PAA–PAH complexes. Such a structural feature endowed the PAA–PAH copolymer with a double-cross-linked structure, enabling significant reinforcement of the material.a The PAA–PAH composites exhibited a tensile strength and an elastic modulus as high as ~ 67 MPa and ~ 2.0 GPa, respectively. Due to the benefits from the reconstruction of the complexes, such as reversible electrostatic interactions and H-bonds between PAA and PAH, the PAA–PAH composite could be repaired/healed readily under ambient conditions (25 °C, 40% humidity) by using the liquid-like form of the PAA–PAH complexes (i.e., coacervate). The healing strategy reported here provides a supplementary method for easy repair or healing of high-strength and stiff supramolecular polymer materials.

中文翻译:

具有机械强度和高刚性的超分子聚合物复合材料,可在环境条件下修复

由于其聚合物链的高度抑制扩散,制造具有高机械强度和刚度的可修复聚合物材料是一个巨大的挑战。在此,通过将聚丙烯酸(PAA)和聚烯丙胺盐酸盐(PAH)在水溶液中络合,然后模制成所需的形状,来制造高强度,高硬度且可修复/可修复的超分子聚合物复合材料。精确调节PAA和PAH之间的静电和H键相互作用会导致相分离和原位形成PAA-PAH复合材料中的纳米结构。PAA–PAH配合物的氢键组装体以纳米球的形式均匀分散在连续相中,而PAA–PAH配合物的静电组装体则存在。这种结构特征赋予了PAA-PAH共聚物双重交联的结构,从而使材料得到了显着的增强。aPAA-PAH复合材料的拉伸强度和弹性模量分别高达〜67 MPa和〜2.0 GPa。 , 分别。由于复合物的重建带来的好处,例如PAA和PAH之间可逆的静电相互作用和H键,可通过使用以下条件在环境条件(25°C,40%湿度)下轻松修复/修复PAA–PAH复合物PAA-PAH复合物的液体状形式(即凝聚层)。本文报道的治疗策略为轻松修复或治愈高强度和刚性的超分子聚合物材料提供了一种补充方法。a PAA-PAH复合材料的抗张强度和弹性模量分别高达〜67 MPa和〜2.0 GPa。由于复合物的重建带来的好处,例如PAA和PAH之间可逆的静电相互作用和H键,可通过使用以下条件在环境条件(25°C,40%湿度)下轻松修复/修复PAA–PAH复合物PAA-PAH复合物的液体状形式(即凝聚层)。本文报道的治疗策略为轻松修复或治愈高强度和刚性的超分子聚合物材料提供了一种补充方法。a PAA-PAH复合材料的抗张强度和弹性模量分别高达〜67 MPa和〜2.0 GPa。由于复合物的重建带来的好处,例如PAA和PAH之间可逆的静电相互作用和H键,可通过使用以下条件在环境条件(25°C,40%湿度)下轻松修复/修复PAA–PAH复合物PAA-PAH复合物的液体状形式(即凝聚层)。本文报道的治疗策略为轻松修复或治愈高强度和刚性的超分子聚合物材料提供了一种补充方法。通过使用液态形式的PAA-PAH复合物(即凝聚层),可以在环境条件(25°C,湿度40%)下容易地修复/修复PAA-PAH复合物。本文报道的治疗策略为轻松修复或治愈高强度和刚性的超分子聚合物材料提供了一种补充方法。通过使用液态形式的PAA-PAH复合物(即凝聚层),可以在环境条件(25°C,湿度40%)下容易地修复/修复PAA-PAH复合物。本文报道的治疗策略为轻松修复或治愈高强度和刚性的超分子聚合物材料提供了一种补充方法。
更新日期:2020-09-16
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