酸解均质制备纳米豆渣纤维素工艺

以富含纤维素的豆渣为原料，采用酸水解辅以均质法制备纳米纤维素，研究HCl浓度、水解时间、水解温度、液料比4个因素对豆渣水解率和纤维素粒度的影响，通过正交试验确定制备豆渣纳米纤维素的最佳工艺条件。结果表明： 最佳工艺条件为HCl溶液浓度3mol/L、水解温度100℃、水解时间120min、液料比45:1(mL/g)、均质压力30MPa；通过激光粒度分析和扫描电镜分析，纳米豆渣纤维素呈微球状，粒度为50～100nm。盐酸水解辅以高压均质工艺处理能有效制得纳米大豆纤维素。

Preparation of Nanocrystalline Cellulose from Soybean Dregs by Acid Hydrolysis Followed by High-Pressure Homogenization

Nanocrystalline cellulose was prepared from soybean dregs, rich in cellulose, using acid hydrolysis followed by high-pressure homogenization. The effects of HCl concentration, hydrolysis time, temperature and liquid-to-solid ratio on degree of hydrolysis of soybean dregs were studied using one-factor-at-a-time combined with orthogonal array design method. The optimal preparation process involved hydrolysis with 3 mol/L HCl at 100 ℃ and a liquid-to-solid ratio of 45:1 for 120 min and subsequent homogenization at 30 MPa. The results of laser particle size analysis and scanning electron microscopic (SEM) observation showed that the obtained nanocrystalline cellulose was microspheres with a particle size range of 50－100 nm. In conclusion, HCl hydrolysis followed by high-pressure homogenization allows the preparation of soybean-derived nanocrystalline cellulose