刺槐豆胶
自愈水凝胶
溶解
蝗虫
卡拉胶
化学
化学工程
材料科学
植物
高分子化学
复合材料
流变学
食品科学
生物
有机化学
黄原胶
工程类
作者
Dana Wirzeberger,O Peleg-Evron,O Peleg-Evron,Dana Wirzeberger
标识
DOI:10.1016/j.ijbiomac.2024.133353
摘要
Most hydrogels swell but do not dissolve in water since their chains are tied to each other. Nevertheless, some hydrogels disintegrate under physiological conditions, a property that could be beneficial in emerging applications, including sacrificial materials, 3D bioprinting, and wound dressings. This paper proposes a novel approach to control the dissolution rate of hydrogels based on the integration of kappa carrageenan nanoparticles (KCAR-NPs) into kappa carrageenan (KCAR) and locust bean gum (LBG) hydrogels to obtain a three-component hybrid system. KCAR and LBG are known to have synergistic interactions, where physical interactions and chain entanglements lead to their gelation. We hypothesized that integrating the bulky nanoparticles would disturb the three-dimensional network formed by the polysaccharide chains and enable manipulating the dissolution rate. Compression, water absorption, rheology, and cryo-scanning electron microscopy measurements were performed to characterize the physical properties and structure of the hydrogels. The hybrid hydrogels displayed much faster dissolution rates than a control system without nanoparticles, which did not completely dissolve within 50 days and offered a cutting-edge means to finely adjust hydrogel dissolution through modulation of KCAR and KCAR-NPs concentrations. The new hydrogels also exhibited shear-thinning and self-healing properties resulting from the weak and reversible nature of the physical bonds.
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