纳米铜碳/海藻酸钠复合水凝胶的制备及性能

Prepration and properities of nano-copper carbon composite/sodium alginate composite hydrogel

以吸附了硫酸铜的天然棉纤维为原料,高温热解制备纳米铜碳复合材料(NCCC),并利用原位释放法以二价钙离子为交联剂制备出纳米铜碳复合材料/海藻酸钠(NCCC/SA)复合水凝胶,来缓释抑藻材料NCCC。调节CaCO_(3)/SA的质量比,考察海藻酸钠水凝胶的力学性能、溶胀和降解性能来优选凝胶载体。调节NCCC/SA质量比,考察NCCC/SA复合水凝胶力学性能、溶胀和降解性能。NCCC/SA质量比越大,复合水凝胶的力学性能越差,但其溶胀和降解性能几乎没有影响。为了应对动态水环境的使用要求,最终选用CaCO_(3)/SA的质量比为18.18%的海藻酸钠水凝胶为载体,NCCC/SA质量比为2∶1来制备复合水凝胶,并模拟NCCC的缓释,为NCCC应用于抑藻的研究奠定了理论基础。

The nano-copper carbon composite(NCCC)was prepared using natural cotton fibers absorbing sulfate copper as a template by one-step thermal process,and then the nano-copper carbon composite(NCCC)/sodium alginate(SA)composite hydrogel was fabricated for the algae control application through in-situ release method by using Ca^(2+) ions as the crosslinking reagent.To optimize suitable hydrogel carrier,the mass ratios of CaCO_(3)/SA were adjusted,and the mechanical properties,the swelling behaviors and the degradation behaviors of SA hydrogel were observed.Moreover,the mechanical properties,the swelling behaviors and the degradation behaviors of composite hydrogel were further studied to optimize suitable amount of NCCC.The composite hydrogel encapsulated with different amounts of NCCC has a significant effect on its mechanical properties,but has little effect on its swelling and degradation.In order to meet the demands of using in dynamic water environment,the process parameters were optimized.Sodium alginate hydrogel with the CaCO_(3)/SA mass ratio of 18.18%was used as the carrier,and NCCC/SA mass ratio of 2 was selected for the NCCC/SA composite hydrogel.The release of NCCC was simulated.This research lays a foundation for NCCC application of the algae control.