Laboratory of Green Chemistry, School of Engineering Science, Lappeenranta University of Technology, Sammonkatu 12, FI-50130 Mikkeli, Finland.
Laboratory of Green Chemistry, School of Engineering Science, Lappeenranta University of Technology, Sammonkatu 12, FI-50130 Mikkeli, Finland.
Carbohydr Polym. 2017 Nov 15;176:327-335. doi: 10.1016/j.carbpol.2017.08.101. Epub 2017 Aug 24.
Synthesis of nanocomposites was performed using microcrystalline cellulose (MCC), MgCl in PEG/NaOH solvent by a thermal-assisted method at different temperatures by varying time and the amount of MCC. Results of XRD, FTIR, and EDS mapping showed that the materials consisted of only cellulose (CL) and magnesium hydroxide (MH). According to FTIR and XRD, it was found that crystallinity of MH in cellulose nanocomposites is increased with temperature and heating time and decreased with increasing of cellulose amount. The PEG/NaOH solvent has a significant effect on cellulose and Mg(OH) morphology. BET and BJH results demonstrated the effects of temperature and cellulose amount on the pore size corresponding to mesoporous materials. TG and DTG analyses showed the increased thermal stability of cellulose nanocomposites with increasing temperature. TEM and SEM analyses showed an even distribution of MH nanostructures with various morphology in the cellulose matrix. The cellulose presented as the polymer matrix in the nanocomposites. It was supposed the possible interaction between cellulose and Mg(OH). The novel synthesis method used in this study is feasible, cost-efficient and environmentally friendly.
采用微晶纤维素（MCC）、MgCl 在 PEG/NaOH 溶剂中，通过热辅助法在不同温度下，通过改变时间和 MCC 的用量来合成纳米复合材料。XRD、FTIR 和 EDS 图谱的结果表明，材料仅由纤维素（CL）和氢氧化镁（MH）组成。根据 FTIR 和 XRD，发现纤维素纳米复合材料中 MH 的结晶度随温度和加热时间的增加而增加，随纤维素用量的增加而降低。PEG/NaOH 溶剂对纤维素和 Mg(OH)的形态有显著影响。BET 和 BJH 结果表明温度和纤维素用量对中孔材料相应孔径的影响。TG 和 DTG 分析表明，随着温度的升高，纤维素纳米复合材料的热稳定性增加。TEM 和 SEM 分析表明，MH 纳米结构在纤维素基质中具有各种形态的均匀分布。纤维素在纳米复合材料中呈现聚合物基质。推测纤维素和 Mg(OH)之间可能存在相互作用。本研究中使用的新型合成方法可行、成本效益高且环保。
