摘要
利用静电纺丝法制备了全氟磺酸(PFSA)-聚醚砜(PES)-纳米颗粒(SiO2、TiO2和Al2O3)复合纳米纤维,比较了SiO2、TiO2和Al2O3等不同纳米颗粒对磺酸基团在纤维表面分布的影响,并利用乙酸乙酯合成反应考察了纤维结构对表面磺酸基团活性的关系。结果表明:静电纺复合纳米纤维的比表面积可达85.6m2.g-1,纳米颗粒均匀分布在纤维表面,表面酸性中心占PFSA酸性基团总量最高达71.2%。酯化反应实验表明,复合纳米纤维具有很好的催化性能,纳米颗粒的存在可以提高酸中心的活性;同时,所得复合纳米纤维膜表现出很好的回收与可再生性能,有望作为一种对环境友好的固体酸催化剂。
Nanofibers of perfluorosulfonic acid（PFSA）,polyethersulfone（PES） and nanoparticles（SiO2,TiO2 and Al2O3） were prepared by electrospinning method from PFSA-PES-nanoparticle suspensions.The effects of nanoparticles on morphology and surface acid groups of thenanofibers were investigated.The composite nanofibers were tested in esterification of acetic acid（HAc） and ethanol（EtOH） to investigate the relationship between structures and catalytic performance.The results showed that the specific surface area of obtained nanofibers was 85.6 m2·g-1.Nanoparticles were well distributed on the surface of the nanofibers and provided enough surface area for the reactants.The number of surface acidic centers on the surface was 71.2% of total PFSA acidic groups.Besides,the nanofibers exhibited good catalytic performance in the reactions due to improvement of activity by the nanoparticles.Moreover,these fibers could be well recovered and regenerated,and could be used as an environmental-friendly solid acid catalyst.
出处
《化工学报》
EI
CAS
CSCD
北大核心
2013年第4期1466-1472,共7页
CIESC Journal
基金
国家自然科学基金项目(21176067,212276075)
广东省重大科技专项(2011A080403004)
上海市科技攻关计划项目(11DZ1205201)
中央高校基本业务探索基金项目(WA1214062)~~
关键词
全氟磺酸
纳米纤维
静电纺丝
纳米颗粒
perfluorosulfonic acid
nanofiber
electrospinning
nanoparticle
