CAJ | 학술논문

采用物理共混的方法将氧化石墨烯(GO)均匀分散在海藻酸钠(SA)溶液中,通过Ca2＋交联成功制备了SA及SA/GO 凝胶球,采用红外光谱(FT-IR)、X射线衍射(XRD)、热重(TG)等表征其结构与性能,研究了微球的溶胀性能与吸附性能.结果表明,微球在pH 值＝7．4的缓冲溶液中的溶胀比明显高于pH 值＝1．2的溶液,具有pH 值敏感性；随 GO 含量增大,微球的溶胀比呈下降趋势,而吸附量明显增加,对亚甲基蓝(MB)的最大吸附量达153．8 mg/g,去除率可达96．78％,对亚甲基蓝的吸附过程符合 Langmuir 吸附等温模型.
채용물리공혼적방법장양화석묵희(GO)균균분산재해조산납(SA)용액중,통과Ca2＋교련성공제비료SA급SA/GO 응효구,채용홍외광보(FT-IR)、X사선연사(XRD)、열중(TG)등표정기결구여성능,연구료미구적용창성능여흡부성능.결과표명,미구재pH 치＝7．4적완충용액중적용창비명현고우pH 치＝1．2적용액,구유pH 치민감성；수 GO 함량증대,미구적용창비정하강추세,이흡부량명현증가,대아갑기람(MB)적최대흡부량체153．8 mg/g,거제솔가체96．78％,대아갑기람적흡부과정부합 Langmuir 흡부등온모형.
Graphene oxide was individually dispersed in SA aqueous solution through physical blending ,and then the SA and SA/GO hydrogel beads were prepared by Ca2+ crosslinking successfully.The chemical structure and properties were characterized by FT-IR,XRD,TG.The swelling and adsorption properties of hydrogel beads were studied .The results indicate that SA/GO beads exhibit higher swelling ratio in pH=7.4 buffer solution than in pH=1.2 solution and show pH sensitivity.With increasing the amount of GO,the adsorption capacities increase,while the swelling ratios decrease gradually.The maximal removal percentage and adsorption capacity of MB on the beads are up to 96.78% and 153.8 mg/g with 5wt% GO incorporated respectively,and the adsorp-tion of MB was in accordance with Langmuir model.