P(AA/AM/APEG)/纳米二氧化硅复合高吸水树脂的合成及性能

Synthesis and Properties of P(AA/AM/APEG)/nano-SiO2 Composite High Absorbent Resin

摘要:

以丙烯酸(AA)、丙烯酰胺(AM)、烯丙基聚氧乙烯醚(APEG)为单体，再引入nano-SiO2，以过硫酸铵为引发剂，N,N-亚甲基双丙烯酰胺（MBA）为交联剂，采用水溶液聚合法制备了P(AA/AM/APEG)/nano-SiO2有机/无机复合高吸水树脂，探讨了交联剂加量、引发剂加量、nano-SiO2加量对树脂吸水倍率的影响，并用红外光谱和扫描电镜进行表征。结果表明：树脂的粒径对树脂的吸水倍率影响很大而温度对其影响较小，当树脂粒径在80~120目时，其吸蒸馏水吸水倍率高达1860g/g；溶液的pH值对树脂的吸水倍率影响较大，当pH值在6~8时，其吸水性能最好；此外，制备的高吸水树脂具有较好的保水性能。红外光谱和扫描电镜分析表明，nano-SiO2成功接枝到聚合物上并形成海绵状结构。

Abstract:

P(AA/AM/APEG)/nano-SiO2 as an efficient inorganic/organic super absorbent polymer composite was synthesized by a aqueous solution polymerization method with acrylic acid (AA) , acrylamide (AM), allyl polyoxyethylene ether (APEG) as monomers, and added to nano-SiO2, with ammonium persulfate(APS) as initiator, N,N'-Methylene bisacrylamide(MBA) as crosslinking agent. The impact factors of synthesizing superabsorbent resin, such as the amount of initiator, crosslinking agent and nano-SiO2, were discussed. Fourier Transform Infrared Spectrometer (FTIR) and Scanning electron microscopy (SEM) was performed to demonstrate the physical characterization. The results showed that the resin particle size had a great influence on the water absorbent rate and the temperature had little effect on resin absorbent rate; when the particle size was 80 ~ 120 mesh, the resin showed the best water absorbency of 1860 g/g; The pH of the solution had a great influence on the water absorbent rate of resin, when the pH was 6 ~ 8, samples exerted the best performance on water absorbency; Besides, super absorbent polymer prepared in this report also had a good performance of water retention capacity. Fourier Transform Infrared Spectrometer (FTIR) and Scanning electron microscopy (SEM) showed that the nano-SiO2 successfully grafted to the polymer and spongy structure was formed.