薯渣再生纤维素及薯渣纤维素接枝丙烯酸的优化

Optimization of regeneration and graft acrylic acid with cellulose from sweet potato residue

以薯渣再生纤维素为原料,丙烯酸为接枝共聚反应单体,制备纤维素接枝丙烯酸产物。分别以薯渣再生纤维素得率和接枝率为指标,首先以氢氧化钠-硫脲-尿素溶液体系,通过正交实验优化协同超声低温提取薯渣再生纤维素的工艺,再利用Plackett-Burman(PB)设计和中心组合设计,优化纤维素接枝丙烯酸产物的工艺条件。采用优化的工艺条件,再生纤维素得率为54.59%,纯度高达96.68%;平均接枝率为(49.024±0.131)%,与预测值49.146%接近。该研究通过纤维素接枝丙烯酸为后续金属离子吸附研究提供理论依据。

Cellulose grafted acrylic acid(Cell-g-AA)product was prepared using sweet potato residue regenerated cellulose(RC)as raw material and the acrylic acid as the graft copolymerization reaction monomer.The yield and grafting rate of RC from sweet potato residue were determined by optimizing the synergistic ultrasonic low-temperature extraction of RC from sweet potato residue in sodium hydroxide-thiourea-urea solution.Plackett-Burman(PB)design and Center Combination Design(CCD)were used to optimize the processing conditions of cellulose grafted acrylic acid products.Under optimal processing conditions,the yield of RC was 54.59%,and the purity reached 96.68%.The average grafting rate was(49.024±0.131)%,which was close to the predicted value of 49.146%.This study provides a theoretical basis for the subsequent metal ion adsorption research by cellulose grafted acrylic acid.