State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510640, Guangdong Province, China.
Bioresour Technol. 2012 Jan;103(1):432-9. doi: 10.1016/j.biortech.2011.09.135. Epub 2011 Oct 8.
This study presents a novel, efficient and environmentally friendly process for the cooking of corn stalk that uses active oxygen (O2 and H2O2) and a recoverable solid alkali (MgO). The structural changes on the surface of corn stalk before and after cooking were characterized by attenuated total reflectance-Fourier transform infrared spectroscopy (ATR-FTIR), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS) and atomic force microscopy (AFM) techniques. The results showed that lignin and extractives were effectively removed, especially those on the surface of corn stalk. Additionally, the changes included becoming fibrillar, the exposure of cellulose and hemi-cellulose and the pitting corrosion on the surface, etc. The results also showed that the removal reaction is from outside to inside, but the main reaction is possibly on the surface. Furthermore, the results of active oxygen cooking with a solid alkali are compared with those of alkaline cooking in the paper.
本研究提出了一种新颖、高效、环保的玉米秸秆蒸煮方法，该方法使用活性氧（O2 和 H2O2）和可回收的固体碱（MgO）。通过衰减全反射傅里叶变换红外光谱（ATR-FTIR）、扫描电子显微镜（SEM）、X 射线光电子能谱（XPS）和原子力显微镜（AFM）技术对蒸煮前后玉米秸秆表面的结构变化进行了表征。结果表明，木质素和提取物被有效去除，特别是玉米秸秆表面的木质素和提取物。此外，还包括纤维状化、纤维素和半纤维素的暴露以及表面的点蚀腐蚀等变化。结果还表明，脱除反应是从外向内进行的，但主要反应可能发生在表面。此外，还比较了固体碱与碱性蒸煮条件下活性氧蒸煮的结果。
