Teijón César, Olmo Rosa, Blanco M Dolores, Teijón José M, Romero Arturo
Departamento de Ingeniería Química, Facultad de Químicas, Universidad Complutense de Madrid, 28040 Madrid, Spain.
J Colloid Interface Sci. 2006 Mar 15;295(2):393-400. doi: 10.1016/j.jcis.2005.10.015. Epub 2005 Nov 8.
Polymeric matrices of poly(2-hydroxyethyl methacrylate) (PHEMA) crosslinked with different percentages of ethylene glycol dimethacrylate (EGDMA) as well as different loads of nickel salt were synthesized. Nickel release from the polymeric systems, and their thermal stability were analyzed. A high percentage of the nickel loaded was released, although strong interactions between the polymeric matrices and the nickel ion must be established since a total nickel release did not take place. The values of the diffusion coefficients showed that nickel release depended on the amount of nickel salt loaded in the polymeric matrix and also on the crosslinking degree of the gels. On the other hand, the presence of nickel salt induced an evident thermal instability in the polymeric matrices, although all the polymeric systems can be considered thermally stable.
合成了用不同百分比的乙二醇二甲基丙烯酸酯（EGDMA）交联以及负载不同量镍盐的聚甲基丙烯酸2-羟乙酯（PHEMA）聚合物基质。分析了镍从聚合物体系中的释放情况及其热稳定性。尽管聚合物基质与镍离子之间必定存在强相互作用，但由于并未发生镍的完全释放，所以仍有高百分比负载的镍被释放出来。扩散系数值表明，镍的释放既取决于聚合物基质中镍盐的负载量，也取决于凝胶的交联度。另一方面，镍盐的存在导致聚合物基质出现明显的热不稳定性，不过所有聚合物体系均可视为热稳定的。
