氧化海藻酸钠交联海藻酸钙/明胶（半）互穿网络的制备及热稳定性研究

摘要

以自制的氧化海藻酸钠为交联剂，制备了海藻酸钙/明胶(半)互穿网络，采用红外光谱表征了(半)互穿网络的结构；通过热重分析研究了海藻酸钙/明胶(半)互穿网络的热稳定性，解释了两者共混过程中的作用机理；并与戊二醛为交联剂制备的海藻酸钙/明胶(半)互穿网络的热稳定性进行了比较。研究结果表明，两种交联剂制备的(半)互穿网络的结构与热稳定性相似，氧化海藻酸钠可以取代毒性较大的戊二醛交联明胶制备海藻酸钙/明胶(半)互穿网络；海藻酸与明胶在共混的过程中发生了物理或化学反应。%Calcium alginate/gelatin (semi)interpenetrating polymer networks (IPNs)were prepared with oxi-dized sodium alginate as a crosslinking agent.The structure and thermal stabilities of (semi)IPNs were charac-terized by Fourier transform infrared spectrometer (FT-IR)and thermogravimetric analysis (TGA),respec-tively.And in contrast with calculated TGA data,the reactive mechanism in the blending process was studied. Compared with the thermal stabilities of (semi)IPNs crosslinked with glutaraldehyde,the results indicated that the thermal stabilities of (semi ) IPNs crosslinked with oxidized sodium alginate were similar to those crosslinked with glutaraldehyde.And oxidized sodium alginate could be instead of toxic glutaraldehyde to crosslink the calcium alginate/gelatin (semi)IPNs system,and physical and/or chemical reaction may take place in the blending process.