微波辅助NaOH-H2O2水解氧化法制备稻根纤维素

为了探讨农业废弃物提取纤维素的新途径,以稻根为原料,采用微波辅助Na OH-H2O2水解氧化法制备稻根纤维素,利用FT-IR、XRD、SEM等对稻根纤维素进行初步表征与分析。从而研究了微波功率、加热时间、Na OH浓度、固液比等因素对稻根纤维素提取率的影响。结果表明：在Na OH浓度6%、微波功率450 W、时间3.0 min、液料比1：25的条件下提取出粗稻根纤维;微波辅助条件下,以H2O2和12.5 g/L硅酸钠混合氧化漂白液处理粗稻根纤维素得到稻根纤维素提取率为89.3%。因此,采用微波辅助Na OH-H2O2水解氧化法制备稻根纤维素去除木质素效率高、对纤维素的结构损伤小,具有节能、高效、污染小等特点。

Microwave Assisted NaOH-H2O2 Hydrolysis Oxidation of Rice Root Cellulose Prepared

In order to explore a new way of cellulose extraction from agricultural waste, taking rice root as the material, using microwave assisted NaOH-H2O2 hydrolysis and oxidation of rice root cellulose prepared, the rice root cellulose were characterized and analyzed by FT-IR, XRD and SEM. The authors studied the effect of microwave power, reaction time, NaOH concentration and olid-liquid ratio on rice root cellulose extraction ratio. The results showed that the best reaction condition was that NaOH concentration was 6%, microwave power was 450 W, reaction time was 3.0 min, olid-liquid ratio was 1:25. Preparation of bleaching liquid with H2O2 sodium silicate and 12.5 g/L, the extraction ratio of rice root cellulose was 89.3%. Therefore, microwave assisted H2O2 hydrolysis- oxidation in the removal of lignin with high efficiency and had little damage of cellulose structure.