Dai Qing-Qing, Ren Jun-Li, Peng Feng, Chen Xiao-Feng, Gao Cun-Dian, Sun Run-Cang
State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510640, China.
Beijing Key Laboratory of Lignocellulosic Chemistry, Beijing Forestry University, Beijing 100083, China.
Materials (Basel). 2016 Aug 11;9(8):690. doi: 10.3390/ma9080690.
Acylated xylan-based magnetic Fe₃O₄ nanocomposite hydrogels (ACX-MNP-gels) were prepared by fabricating Fe₃O₄ nanoctahedra in situ within a hydrogel matrix which was synthesized by the copolymerization of acylated xylan (ACX) with acrylamide and -isopropylacrylamide under ultraviolet irradiation. The size of the Fe₃O₄ fabricated within the hydrogel matrix could be adjusted through controlling the crosslinking concentrations (C). The magnetic hydrogels showed desirable magnetic and mechanical properties, which were confirmed by XRD, Raman spectroscopy, physical property measurement system, SEM, TGA, and compression test. Moreover, the catalytic performance of the magnetic hydrogels was explored. The magnetic hydrogels (C = 7.5 wt %) presented excellent catalytic activity and provided a sensitive response to H₂O₂ detection even at a concentration level of 5 × 10 mol·L. This approach to preparing magnetic hydrogels loaded with Fe₃O₄ nanoparticles endows xylan-based hydrogels with new promising applications in biotechnology and environmental chemistry.
通过在水凝胶基质中原位制备八面体四氧化三铁(Fe₃O₄),制备了酰化木聚糖基磁性Fe₃O₄纳米复合水凝胶(ACX-MNP-凝胶)。该水凝胶基质是由酰化木聚糖(ACX)与丙烯酰胺和N-异丙基丙烯酰胺在紫外线照射下共聚合成的。通过控制交联浓度(C),可以调节水凝胶基质中制备的Fe₃O₄的尺寸。通过X射线衍射(XRD)、拉曼光谱、物理性能测量系统、扫描电子显微镜(SEM)、热重分析(TGA)和压缩试验证实,磁性水凝胶具有理想的磁性能和力学性能。此外,还探索了磁性水凝胶的催化性能。磁性水凝胶(C = 7.5 wt%)表现出优异的催化活性,即使在5×10⁻⁸mol·L的浓度水平下,对过氧化氢检测也能提供灵敏的响应。这种制备负载Fe₃O₄纳米颗粒的磁性水凝胶的方法,赋予了木聚糖基水凝胶在生物技术和环境化学领域新的应用前景。
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