聚丙烯酰胺(PAM)水凝胶在生物学领域有着广泛的应用,医学,制药和环境部门。然而,实现必要的机械性能,抗疲劳性,自我恢复,生物相容性,和生物降解性仍然是一个挑战。在这里,我们提出了一种通过整合短线性葡聚糖(SLG)来构建纳米复合水凝胶的简单方法,通过脱支糯玉米淀粉获得,通过自组装进入PAM网络。所得的具有10%SLG含量的复合水凝胶表现出令人满意的拉伸性(承受超过1200%的应变),在90%变形时,最大压缩和剪切强度约为490kPa和39kPa,分别。水凝胶表现出显著的弹性并且可以承受重复的压缩和拉伸。值得注意的是,10%SLG含量的纳米复合水凝胶在20s后90%的压缩变形时表现出完全的应力恢复,不需要特定的环境条件,达到98%的能量耗散回收率。同时,这些水凝胶对各种软质和硬质基材表现出强粘附力,包括皮肤,玻璃和金属。此外,它们在溶胀平衡后在37°C和50°C下保持固体完整性,与传统的PAM水凝胶不同,在类似条件下表现出软化。我们希望这种PAM-SLG水凝胶将为多功能电子设备的开发开辟新的途径,提供增强的性能和多功能性。
Polyacrylamide (PAM) hydrogels are widely used in wide-ranging applications in biology, medicine, pharmaceuticals and environmental sectors. However, achieving the requisite mechanical properties, fatigue resistance, self-recovery, biocompatibility, and biodegradability remains a challenge. Herein, we present a facile method to construct a nanocomposite hydrogel by integrating short linear glucan (SLG), obtained by debranching waxy corn starch, into a PAM network through self-assembly. The resulting composite hydrogel with 10 % SLG content exhibited satisfactory stretchability (withstanding over 1200 % strain), along with maximum compressive and shear strengths of about 490 kPa and 39 kPa at 90 % deformation, respectively. The hydrogel demonstrated remarkable resilience and could endure repeated compression and stretching. Notably, the nanocomposite hydrogel with 10 % SLG content exhibited full stress recovery at 90 % compression deformation after 20 s, without requiring specific environmental conditions, achieving an energy dissipation recovery rate of 98 %. Meanwhile, these hydrogels exhibited strong adhesion to various soft and hard substrates, including skin, glasses and metals. Furthermore, they maintain solid integrity at both 37 °C and 50 °C after swelling equilibrium, unlike traditional PAM hydrogels, which exhibited softening under similar conditions. We hope that this PAM-SLG hydrogel will open up new avenues for the development of multifunctional electronic devices, offering enhanced performance and versatility.