Department of Chemistry, Rajshahi University, Rajshahi 6205, Bangladesh.
Pilot Plant and Process Development Centre, BCSIR, Dhaka 1205, Bangladesh.
Carbohydr Polym. 2017 Aug 15;170:72-79. doi: 10.1016/j.carbpol.2017.04.059. Epub 2017 Apr 25.
This investigation describes the preparation of magnetically doped degradable microcrystalline cellulose (MCC) nanocomposite particles with application potential in biotechnology, solid support for biomolecule/water purification, oil recovery from water and beyond. MCC was first extracted from cotton wool, the most abundant biocompatible polymer, by sulfuric acid hydrolysis and the effect of acid strength was examined. The size of the elongated fiber structure was reduced with increasing acid strength. MCC particles extracted by treatment with 70% sulfuric acid were used to prepare magnetic MCC nanocomposite particles. The nanocomposite particles named as MCC/FeO were prepared via in situ co-precipitation of Fe/Fe from their alkaline solution. The precipitated FeO nanoparticles are expected to be bonded with MCC particles via hydrogen bonding. The nanocomposite dispersion was colloidally stable and the particles responded when external magnetic field was applied. It was possible to control the magnetic property by regulating the content of iron oxide.
本研究描述了可降解微晶纤维素（MCC）磁性纳米复合材料颗粒的制备，其在生物技术中有应用潜力，可用作生物分子/水净化的固载材料、从水中回收油等。MCC 首先通过硫酸水解从最丰富的生物相容性聚合物棉绒中提取，并考察了酸强度的影响。随着酸强度的增加，纤维结构的长度减小。用 70%硫酸处理提取的 MCC 颗粒用于制备磁性 MCC 纳米复合材料颗粒。通过碱性溶液中 Fe/Fe 的原位共沉淀制备了命名为 MCC/FeO 的纳米复合材料颗粒。沉淀的 FeO 纳米颗粒预计通过氢键与 MCC 颗粒结合。纳米复合材料分散体具有胶体稳定性，当施加外部磁场时，颗粒会发生响应。通过调节氧化铁的含量可以控制磁性。
