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首先合成了Al(OH)_3微纳米颗粒,然后以氧化-还原引发体系((NH_4)_2S_2O_4-NaHSO_4)合成了纳米Al(OH)_3-聚丙烯酰胺(PAM)复合絮凝剂。研究考察了反应物浓度对纳米颗粒粒径的影响,以及反应温度、引发剂用量、Al(OH)_3粒径等因素对复合PAM合成的影响,结果表明:纳米Al(OH)_3的引入使得复合聚合物分子量显著提高。电导和热失重测量结果表明,复合物PAM的端基(—SO_4~(2-))与带正电荷的Al(OH)_3纳米颗粒以离子键结合。扫描电镜结果显示复合PAM呈无晶形堆积状,能谱分析结果表明Al(OH)_3微纳米颗粒与丙烯酰胺形成复合物。
Firstly, Al (OH) 3 micro-nano particles were synthesized and then nano-Al (OH) 3 polyacrylamide (PAM) composite flocculant was synthesized by the oxidation-reduction system (NH4) 2S2O4-NaHSO4. The effect of reactant concentration on the particle size of nanoparticles and the effect of reaction temperature, initiator dosage and particle size of Al (OH) 3 on the synthesis of PAM were studied. The results showed that the introduction of nano-Al (OH) Composite polymer molecular weight increased significantly. The results of conductance and thermogravimetric measurements show that the terminal groups (-SO_4 ~ (2-)) of complex PAM are ionically bound to the positively charged Al (OH) _3 nanoparticles. Scanning electron microscopy results showed that the composite PAM was amorphous and the results of energy spectrum analysis showed that Al (OH) 3 micro-nanoparticles formed a complex with acrylamide.