氧化石墨烯/海藻酸钙复合膜的制备与性能

Preparation and Properties of Graphene Oxide/Calcium Alginate Composite Film

以海洋生物多糖海藻酸钠为基质,氧化石墨烯（GO）为改性添加剂,乙二醇双（2-氨基乙醚）四乙酸钙（EGTA-Ca）为交联剂,制备了网络结构均匀的氧化石墨烯/海藻酸钙复合膜。分别利用红外光谱、扫描电子显微镜、电子拉力机考察了复合膜的结构、表面形貌、力学性能和溶胀性能。结果表明,GO均匀分散在海藻酸盐基体中,GO的加入对于海藻酸钙膜的力学性能具有显著影响,当GO添加量为海藻钠原料质量的1%时,复合膜的断裂强度和断裂伸长率均达到最大,比未添加氧化石墨烯膜分别增加了~82%和~265%,适量乙二醇的加入对于复合膜具有很好的增塑作用。GO的加入对复合膜的溶胀性能影响不大。

Graphene oxide/calcium alginate composite films with homogeneous network structure were prepared using marine bio-based polysaccharide （sodium alginate） as matrix, graphene oxide as modifying additive, calcium ethylene glycol bis （2-aminoethyl ether） tetraacetate （EGTA-Ca） as crosslinking agent. The structure, surface morphology, mechanical performance and swelling property were investigated through infra-red spectroscopy, scanning electronic microscope and electronic tensile testing machine. The results show that GO is dispersed homogeneously inside alginate matrix. Addition of GO has significant influence on the mechanical performance of calcium alginate film. The tensile strength and breakage elongation reach maximum with the addition of lwt % GO, increasing correspondingly by --82% and --265% compared to those of pure calcium alginate film without GO. Addition of moderate amount of ethylene glycol is helpful for tenacity improvement of the film. The swelling property of the composite films is changed slightly by addition of GO.