硅酸钙-海藻酸钙复合水凝胶膜的制备及表征

将海藻酸钠与硅酸钙共混,经过钙离子交联制备了硅酸钙-海藻酸钙(CaSiO_3-CaAlg)复合水凝胶平板膜,观测了其形貌。对CaSiO_3-CaAlg复合膜进行了FTIR、TG和XRD表征。研究了不同CaSiO_3含量的CaSiO_3-CaAlg复合水凝胶平板膜在湿态下的力学拉伸性能,并研究了其溶胀性能。结果表明,CaSiO_3与CaAlg具有较好的相容性,CaSiO_3的加入改善了CaAlg的热性能。随着CaSiO_3含量的增加,CaSiO_3-CaAlg复合水凝胶膜的极限应力先增加后减小。CaSiO_3-CaAlg复合水凝胶膜制备方法简单,没有用到任何有机溶剂,膜厚度可控且均匀,易批量生产,有望应用于组织工程材料以及医用敷料中。

Preparation and characterization of calcium silicate-calcium alginate composite hydrogel film

Calcium silicate-calcium alginate (CaSiO3-CaAlg)composite hydrogel plate films were prepared by calci-um ion cross-linking the mixture of calcium silicate and sodium alginate,and their morphologies were observed.The CaSiO3-CaAlg film was characterized by FTIR,TG and XRD.The mechanical tensile properties of CaSiO3-CaAlg composite hydrogel films with different contents of CaSiO3 on the CaAlg were investigated under wet condition.The results show that the CaSiO3 and CaAlg have good compatibility and the addition of CaSiO3 can improve the thermal performance of CaAlg.With the increase of calcium silicate in CaSiO3-CaAlg composite hydrogel membrane,the limited stress first increases,and then decreases.The preparation of CaSiO3-CaAlg composite film is simple,with-out using any organic solvent and is easily to be batch produced.The thickness of the film is controllable and uni-form.CaSiO3-CaAlg composite hydrogel films are expected to be used in tissue engineering and medical dressings.