中文摘要：

采用化学交联法合成了新型的氧化石墨烯/聚海藻酸钠丙烯酸凝胶,考察了氧化石墨烯的用量对凝胶的结构和溶胀性能的影响,并对凝胶的溶胀行为与pH的响应性进行了研究。结果表明：随着氧化石墨烯含量的增大（w〈0.05%）,凝胶的溶胀性能也会随之增大;当氧化石墨烯质量分数为0.05%时,凝胶的溶胀性能最大;当氧化石墨烯含量（w〉0.05%）继续增大时,凝胶的溶胀性能随之减小。在中性介质中,凝胶的溶胀能力最高,在酸性和碱性介质中,也保留着相对较高的溶胀能力。

英文摘要：

A series of novel graphene oxide（GO）/poly（sodium alginate-co-acrylic acid）absorbent hydrogel nanocomposites were prepared by in situ radical solution polymerization.The effects of GO content on the chemical structure and morphology of the hydrogels were studied.The swelling behaviors,swelling kinetics and pH-responsive behaviors of the hydrogels were also evaluated.Furthermore,the swelling capacities of hydrogels went up with increasing GO loadings to 0.05wt% and then decreased with further increasing GO loadings.It is worth noting that the hydrogel only containing 0.05% GO exhibited the highest swelling capacity.The swelling capacity of hydrogel is the highest in neutral medium,and could also retain relatively higher swelling capacities at acidic and basic solutions.