羧甲基化改性玉米芯残渣的结构、性质及潜在应用
Structures, Properties and Potential Applications of Corncob Residue Modified by Carboxymethylation.
作者信息
Gao Shishuai, Liu Yupeng, Wang Chunpeng, Chu Fuxiang, Xu Feng, Zhang Daihui
机构信息
National Engineering Laboratory for Biomass Chemical Utilization, Key Laboratory of Chemical Engineering of Forest Products, National Forestry and Grassland Administration, Key Laboratory of Biomass Energy and Material, Institute of Chemical Industry of Forest Products, Chinese Academy of Forestry, Nanjing 210042, China.
College of Materials Science and Technology, Beijing Forestry University, Beijing 100083, China.
出版信息
Polymers (Basel). 2020 Mar 11;12(3):638. doi: 10.3390/polym12030638.
In this study, corncob residue (CR) valorization was simply and efficiently realized via carboxymethylation, and its enhanced performance as fillers in urea-formaldehyde (UF) resin was investigated. The structures of corncob residue and carboxymethylated derivative were analyzed by nuclear magnetic resonance (NMR), Fourier-transform infrared spectroscopy (FTIR), and Raman techniques, respectively. The thermal stability, morphology, viscosity control, and adhesive strength were then investigated to evaluate its performance as fillers in UF resin composite. Similar to commercial flour, carboxymethylated CR could effectively disperse in UF resin. It also exhibited a better initial viscosity control between 30 and 50 °C. The adhesive test analysis showed that the shear strength of resin with carboxymethylated CR addition could reach 1.04 MPa, which was comparable to flour (0.99 MPa) and significantly higher than raw CR (0.45 MPa). Moreover, a low formaldehyde emission was observed.
在本研究中，通过羧甲基化简单高效地实现了玉米芯残渣（CR）的增值利用，并研究了其作为脲醛（UF）树脂填料时增强的性能。分别采用核磁共振（NMR）、傅里叶变换红外光谱（FTIR）和拉曼技术分析了玉米芯残渣及其羧甲基化衍生物的结构。随后研究了热稳定性、形态、粘度控制和粘合强度，以评估其作为UF树脂复合材料填料的性能。与市售面粉类似，羧甲基化CR能有效分散在UF树脂中。在30至50°C之间，它还表现出更好的初始粘度控制。粘合试验分析表明，添加羧甲基化CR的树脂的剪切强度可达1.零4MPa，与面粉（0.99MPa）相当，且显著高于未处理的CR（0.45MPa）。此外，观察到甲醛排放量较低。
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