Bifunctional Fe3O4 nanoparticles as magnet and inducer in bioextruded fabrication of starch-based composite with hierarchical pore architecture.
Bifunctional Fe3O4 nanoparticles as magnet and inducer in bioextruded fabrication of starch-based composite with hierarchical pore architecture.
复制标题
DOI：
10.1016/j.ijbiomac.2021.09.050
复制
发表时间：
2021-09
影响因子：
8.2
通讯作者：
Enbo Xu;Shuohan Ma;Zhengzong Wu;Wenjun Wang;Ximing Zhang;Jinhu Tian;Dandan Li;Jianwei Zhou;Donghong Liu
中科院分区：
文献类型：
--
作者：
Enbo Xu;Shuohan Ma;Zhengzong Wu;Wenjun Wang;Ximing Zhang;Jinhu Tian;Dandan Li;Jianwei Zhou;Donghong Liu
以淀粉（St）为绿色可再生基质（> 80%，db），采用生物挤压法制备Zn-St-MOCP/nFe 3 O 4复合材料。通过SEM-EDS分析，证实了Fe 3 O 4纳米粒子具有磁性和孔诱导剂的双重功能，并能更均匀地嵌入到具有分级多孔结构的St基骨架中。对于Zn-St-MOCP/nFe 3 O 4复合材料的nFe 3 O 4诱导微结构，观察到亚微米孔和纳米孔，Fe 3 O 4纳米颗粒在微米通道的内表面上。XPS、XRD、FTIR、TGA分析表明，Fe 3 O 4纳米粒子的存在可能是由于Fe 3 +/2+和Zn 2 +/羟基之间的配位作用以及St链在晶区/非晶区的复合。饱和磁化强度值的测定具有良好的分离性能。用七个动力学方程拟合了染料吸附数据。总体而言，nFe 3 O 4-辅助生物挤出策略开发的生物基材料的连续制造与快速磁分离和分级孔结构的实际吸附有前途的。
Starch (St) was used as green and renewable matrix (> 80%, db) for the preparation of Zn-St-MOCP/nFe3O4composite via bioextrusion. Bifunction of Fe3O4NPs as magnet and pore-inducer was confirmed and could be more homogeneously embedded in the St-based framework with hierarchical porous structure via SEM-EDS mapping. For the nFe3O4-induced microstructure of Zn-St-MOCP/nFe3O4composite, submicronic pores and nanopores were observed with Fe3O4NPs onto the inner surface of micron channels. According to the XPS, XRD, FTIR, TGA analyses, it is probably due to the coordination between Fe3+/2+and Zn2+/hydroxy groups and the recombination of St chains in crystalline/amorphous zones interfered by Fe3O4NPs. Saturation magnetization value was measured with an excellent separation behavior. Seven kinetic equations were conducted for the fitting of dye adsorption data. Overall, the nFe3O4-assisted bioextrusion strategy is developed for the continuous fabrication of bio-based materials with rapid magnetic separation and hierarchical-pore architecture promising in practical adsorption.