College of Food Science and Engineering, Qingdao Agricultural University, Qingdao, Shandong Province 266109, China; Qingdao Special Food Research Institute, Qingdao 266109, China.
College of Food Science and Engineering, Qingdao Agricultural University, Qingdao, Shandong Province 266109, China; Qingdao Special Food Research Institute, Qingdao 266109, China.
Carbohydr Polym. 2024 Sep 15;340:122241. doi: 10.1016/j.carbpol.2024.122241. Epub 2024 May 8.
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.
聚丙烯酰胺 (PAM) 水凝胶广泛应用于生物学、医学、制药和环境等领域。然而，实现所需的机械性能、耐疲劳性、自恢复性、生物相容性和可生物降解性仍然是一个挑战。在此，我们提出了一种简便的方法，通过自组装将短链线性葡聚糖 (SLG) （通过支链蜡质玉米淀粉解支化获得）整合到 PAM 网络中，构建纳米复合水凝胶。在含有 10% SLG 的复合水凝胶中，其拉伸性令人满意（可承受超过 1200%的应变），最大压缩强度和剪切强度分别约为 490kPa 和 39kPa，在 90%的变形下。该水凝胶表现出出色的弹性，能够承受反复的压缩和拉伸。值得注意的是，在 10% SLG 含量的纳米复合水凝胶中，在 20 秒内实现了 90%压缩变形下的完全应力恢复，无需特定的环境条件，能量耗散恢复率达到 98%。同时，这些水凝胶对各种软、硬基底（包括皮肤、玻璃和金属）具有很强的附着力。此外，与传统的 PAM 水凝胶不同，它们在 37°C 和 50°C 下膨胀平衡后仍保持固体完整性，在类似条件下，后者会软化。我们希望这种 PAM-SLG 水凝胶将为多功能电子设备的发展开辟新途径，提供更高的性能和多功能性。
