摘要
在Hummers法基础上制得了氧化石墨烯(GO),采用流延法制备了氧化石墨烯/κ-卡拉胶(GO/κ-Car)复合膜材料.结合红外光谱、扫描电子显微镜及热重分析对其结构进行表征.探讨了不同条件所得膜的成膜性、溶解性、透气性和力学性能,得到性质稳定GO/κ-Car复合膜的制备条件为15.0 g 3%的κ-Car溶液、0.040 g GO粉末及5.0 g 8%的PVA溶液于75℃搅拌混合5 h后,流延铺平,于30℃烘干6.5 h.GO质量分数为5%的GO/κ-Car复合膜的最大负荷、拉伸强度及杨氏模量分别是对照组κ-Car膜的1.5倍、1.5倍和1.6倍.同时,GO/κ-Car复合膜具有较强的透气性能,且保留了κ-Car清除羟基自由基的生物性能.
Graphene oxide（GO） was synthesized using a modified Hummer＇s method.GO and κ-Carra-geenan（κ-Car） film（GO/κ-Car film） was prepared via tape casting and characterized by IR,SEM,and TGA.We optimized the formula and preparation conditions of GO/κ-Car film by single-factor experiment to obtain the proper appearance,solubility,water vapor permeation and mechanical properties.The stable film was fabricated as follows： 15.0 g 3% κ-Car solution,0.040 g GO powder and 5.0 g 8%PVA solution were mixed by intensely stirring for 5 h at 75 ℃.The mixture was then cast evenly,kept at 30 ℃ for 6.5 h and peeled off as a free-standing film.Compared with the κ-Car film,the mechanical properties of the GO/κ-Car film were significantly improved.With incorporation of 5.0 % GO,the peak load,tensile strength and tensile modulus of the GO/κ-Car film are improved by 1.5-fold,1.5-fold and 1.6-fold,respectively.Meanwhile,GO/κ-Car film has good water vapor permeability as well as hydroxyl radical scavenging activity.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
2013年第3期692-697,共6页
Chemical Journal of Chinese Universities
基金
国家科技支撑计划(批准号:2010BAK67B15)资助
关键词
Κ-卡拉胶
氧化石墨烯
复合膜
性能
κ-Carrageenan
Graphene oxide
Composite film
Property
