CS-g-PDN的制备及性能研究
Preparation and Properties of CS-g-PDN
摘要: 本文以壳聚糖(CS)、N,N-二甲基丙烯酰胺(NAM)和甲基丙烯酰氧乙基三甲基氯化铵(DMC)为原料，通过水热自由基聚合成功制备了新型三元共聚絮凝剂CS-g-PDN。研究采用单因素与正交实验优化合成条件，确定最佳条件为反应温度55℃、时间3.5 h、单体质量比CS:DMC:NAM = 1:2:3。该絮凝剂对阴离子染料(苋菜红、刚果红、酸性橙G)具有优异去除效果(最高>98%)，且在pH = 3~7范围内性能稳定。表征结果(FT-IR, XRD, SEM, BET)证明DMC与NAM成功接枝，产物具有更大比表面积和三维多孔结构，显著提升了吸附与桥联能力。与CS-g-PDA相比，CS-g-PDN絮凝速率更快，24 h内可达最大去除率，具备高效、环保的应用潜力。
Abstract: In this study, a novel ternary copolymer flocculant CS-g-PDN was successfully synthesized via hydrothermal free radical polymerization using chitosan (CS), N,N-dimethylacrylamide (NAM), and methacryloxyethyltrimethylammonium chloride (DMC) as raw materials. Single-factor and orthogonal experiments were employed to optimize the synthesis conditions, with the optimal parameters determined as follows: reaction temperature of 55˚C, reaction time of 3.5 h, and monomer mass ratio of CS:DMC:NAM = 1:2:3. The flocculant exhibited excellent removal efficiency (>98%) for anionic dyes (Amaranth, Congo Red, Acid Orange G) and maintained stable performance within the pH range of 3~7. Characterization results (FT-IR, XRD, SEM, BET) confirmed the successful grafting of DMC and NAM, with the product demonstrating a larger specific surface area and a three-dimensional porous structure, which significantly enhanced its adsorption and bridging capabilities. Compared with CS-g-PDA, CS-g-PDN exhibited a faster flocculation rate, achieving maximum removal efficiency within 24 hours, demonstrating promising potential for efficient and environmentally friendly applications.
文章引用：蒋天冰, 汤霞, 魏燕, 韩甜, 李育桐. CS-g-PDN的制备及性能研究[J]. 材料化学前沿, 2026, 14(2): 85-99. https://doi.org/10.12677/amc.2026.142011

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