中外合作办学模式下学生科研创新的培养——脱脂棉纳米纤维素超声法制备及工艺条件优化实验  

Cultivation of Student Scientific Research Innovation under Sino-foreign Cooperative Education Model:Preparation of Nanocellulose from Defatted Cotton by Ultrasonic Method and Process Condition Optimization Experiment

作　　者：刘志明[1] Liu Zhiming(Aulin College,Northeast Forestry University,Harbin 150040,China)

机构地区：[1]东北林业大学奥林学院,黑龙江哈尔滨150040

出　　处：《广东化工》2024年第19期200-202,共3页Guangdong Chemical Industry

基　　金：东北林业大学教育教学研究项目(国际教育专项)(DGYGJ2022-01)。

摘　　要：脱脂棉纳米纤维素超声法制备及工艺条件优化实验为例,在单因素实验结果的基础上进行响应面法优化超声辅助硫酸水解脱脂棉制备纳米纤维素,最优制备工艺条件为超声时间31.91 min、硫酸浓度55.88%,反应温度50.55℃,考虑到实际操作的便利,将最佳工艺条件修正为超声时间32 min、硫酸浓度56%,反应温度51℃。在此工艺条件下,实际测得纳米纤维素得率平均值为90.84%,与响应面模型预测值90.41%相接近;模型的决定系数为92.51%,说明模型拟合有效。总结实验,培养学生查阅文献、创新实验设计、测试仪器的高效利用等科研能力。Taking the ultrasonic preparation of defatted cotton nanocellulose and process condition optimization experiment as an example,response surface methodology was used to optimize the preparation of nanocellulose by ultrasonic assisted sulfuric acid hydrolysis of defatted cotton based on the results of single factor experiments.The optimal preparation process conditions were ultrasonic time of 31.91 min,sulfuric acid concentration of 55.88%,and reaction temperature of 50.55℃.Considering the convenience of actual operation,the optimal process conditions were modified to ultrasonic time of 32 min and sulfuric acid concentration of 56%,The reaction temperature is 51℃.Under these process conditions,the actual measured average yield of nanocellulose is 90.84%,which is close to the predicted value of 90.41%by the response surface model;The coefficient of determination of the model is 92.51%,indicating the effectiveness of the model fitting.Summarize experiments,cultivate students'research abilities such as literature review,innovative experimental design,and efficient use of testing instruments.

关 键 词：中外合作办学机构 纳米纤维素 响应面优化 实验设计 创新 

分 类 号：G642[文化科学—高等教育学]