Processing tough supramolecular hydrogels with tunable strength of polyion complex
Processing tough supramolecular hydrogels with tunable strength of polyion complex
复制标题
加工具有可调节聚离子复合物强度的坚韧超分子水凝胶
DOI：
10.1016/j.polymer.2016.04.043
复制
发表时间：
2016-07
期刊：
影响因子：
4.6
通讯作者：
Zheng Qiang
中科院分区：
文献类型：
--
作者：
Zhu Fengbo;Lin Xiao Ying;Wu Zi Liang;Cheng Libo;Yin Jun;Song Yihu;Qian Jin;Zheng Qiang
坚韧水凝胶的迅速发展促进了这类软质材料在承载系统中的应用。然而，坚韧的凝胶通常具有差的可加工性，这对于用凝胶构建复杂结构至关重要。在本文中，我们展示了通过简单的压缩成型或挤出来加工坚韧的聚离子复合物（PIC）水凝胶，这依赖于加工过程中和加工后离子键的不同强度。将聚阳离子和聚阴离子的溶液--聚（3-（甲基丙烯酰氨基）丙基三甲基氯化铵）和聚（对苯乙烯磺酸钠）混合形成的PIC沉淀物用选定浓度的盐溶液增塑。这些原材料，最初是脆弱和粘弹性的，很容易加工成不同的形状。在将制备的凝胶在水中溶胀以透析出PIC的盐和抗衡离子之后，获得在加工过程中具有强加形状的坚韧平衡凝胶。含水量为50- 70wt%的凝胶具有良好的力学性能，其拉伸断裂应力、断裂应变和撕裂断裂能分别为3.7MPa、700%和8 × 103 J/m ~ 2。这些力学性能可以通过调节PIC的电荷比来有效地定制。然而，盐水的浓度对最终平衡的凝胶的机械性质具有可忽略的影响。由于离子键的动态和可逆性质，所得PIC凝胶还表现出刺激触发的愈合特性。该研究将促进坚韧PIC凝胶在软致动器结构元件和合成组织中的应用。
The rapid developments of tough hydrogels have promoted the applications of this kind of soft materials in loading bearing systems. However, tough gels usually have poor processibility, which is crucial for the construction of complex structures with gels. In this paper, we demonstrate the processing of tough polyion complex (PIC) hydrogels by simple compression moulding or extruding, which relies on the distinct strength of ionic bonds during and after the processing. The PIC precipitates formed by mixing the solutions of polycation and polyanion, poly(3-(methacryloylamino)propyl-trimethylammonium chloride) and poly(sodium p-styrenesulfonate), are plasticized by saline solution with selected concentration. These raw materials, initially weak and viscoelastic, are easily processed into different shapes. After swelling the as-prepared gels in water to dialyze out the salt and counterions of PIC, tough equilibrated gels are obtained with the imposed shapes during processing. These gels with 50–70 wt% water show good mechanical properties, with tensile fracture stress, fracture strain and tearing fracture energy being 3.7 MPa, 700% and 8 × 103J/m2, respectively. These mechanical properties can be effectively tailored by tuning the charge ratio of PIC. However, the concentration of saline water has negligible influence on the mechanical properties of final equilibrated gels. The resultant PIC gels also exhibit stimuli-triggered healing properties owing to the dynamic and reversible nature of the ionic bonds. This study should promote the applications of tough PIC gels in structural elements of soft actuators and synthetic tissues.
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影响因子：
6.2
作者：
Porcel, Claudine H.;Schlenoff, Joseph B.
通讯作者：
Schlenoff, Joseph B.
DOI：
10.1002/adma.201501099
发表时间：
2015-07-15
期刊：
Advanced materials (Deerfield Beach, Fla.)
影响因子：
--
作者：
Hong S;Sycks D;Chan HF;Lin S;Lopez GP;Guilak F;Leong KW;Zhao X
通讯作者：
Zhao X
影响因子：
29.4
作者：
Andreas Reisch;Emilie Roger;Thida Phoeung;C. Antheaume;Camille Orthlieb;F. Boulmedais;P. Lavalle;
通讯作者：
Andreas Reisch;Emilie Roger;Thida Phoeung;C. Antheaume;Camille Orthlieb;F. Boulmedais;P. Lavalle;
影响因子：
6.2
作者：
Hong, Jinkee;Kim, Byeong-Su;Hammond, Paula T.
通讯作者：
Hammond, Paula T.
影响因子：
5.5
作者：
Hao, Jinkun;Weiss, R. A.
通讯作者：
Weiss, R. A.