P(NIPAm-co-AMPS)温敏水凝胶的合成及表征

Synthesis and Characterization of P(NIPAm-co-AMPS) Thermo-sensitive Hydrogel

摘要: 利用水性引发剂制备了聚（NIPAm-AMPS），经过红外图对其结构谱进行确认。研究交联剂用量、AMPS含量、水溶液浓度和反应温度等因素对水凝胶的相变温度（LCST）的影响。结果表明，交联剂用量对水凝胶的相变温度（LCST）影响不大；随着AMPS含量的增加，水凝胶的相变温度（LCST）逐渐升高，可以控制 AMPS和 NIPAAm 的摩尔比来改变凝胶的相变温度（LCST）。实验证明：对于同样一种材料，随着材料水溶液浓度的提高，相变温度会逐渐降低，而沉降温度会逐渐提高；随着树脂合成温度的升高，对应的树脂相变点温度呈下降趋势。

Abstract: Polymerization (NIPAm-AMPS) was prepared with aqueous initiator.The structure was confirmed by infrared spectrum.The effects of crosslinking agent dosage, AMPS content, aqueous solution a concentration and reaction temperature on phase-transition temperature (LCST) of hydrogels were studied.The results showed that the crosslinking agent dosage had little effect on the LCST of hydrogel.With the increase of AMPS content,the LCST of hydrogel increased gradually.It can control the molar ratio of AMPS and NIPAAm to change the LCST of the gel.For the same kind of material,with the increase of the material aqueous solution concentration,the phase-transition temperature will gradually decrease,and the sedimentation temperature will gradually increase.