摘要
利用重构法将水滑石(HT)原位构建到聚乙烯亚胺-环氧氯丙烷共聚物(PEIE)分子链间制成PEIE-HT复合物,将PEIE-HT复合物涂覆于聚砜超滤膜(PSf)上,制成PEIE-HT/PSf复合膜。以CO2/N2(15%(φ)CO2+85%(φ)N2)混合气为进料气,考察了HT衍生复合氧化物(LDO)添加量、压力、湿涂层厚度和温度对PEIE-HT/PSf复合膜渗透选择性能的影响。实验结果表明,LDO添加量为1.0%(w)、湿涂层厚度为50μm的PEIE-HT/PSf复合膜,在0.11 MPa和25℃的条件下,CO2渗透速率可达5 693 GPU,CO2/N2分离因子达268,显示出良好的CO2分离性能,具有在烟道气或密闭空间等场合捕集CO2的良好应用前景。
A PEIE-HT complex was prepared through a reconstruction method,which structured hydrotalcite（HT） channels in the molecular chains of the polyethyleneimine-epichlorohydrin copolymer（PEIE）,and then the PEIE-HT/PSf composite membrane was manufactured by coating PEIE-HT complex on polysulfone ultrafiltration membrane（PSf）. The effects of LDO（HT precursor）dosage,pressure,wet coating thickness and temperature on the performances of the PEIE-HT/PSf composite membrane were investigated. The PEIE-HT/PSf composite membrane revealed excellent performances for gas separation. Under the conditions of CO2/N2（15%（φ）CO2 ＋ 85%（φ）N2） as feed gas,LDO dosage 1.0%（w）,wet coating thickness 50 μm,0.11 MPa and 25 ℃,the CO2 permeance and the CO2 /N2 selectivity of PEIE-HT/PSf composite membrane reached 5 693 GPU and 268,respectively. The PEIE-HT/PSf composite membrane could be used to capture CO2 in flue gas or purify air in a confined space.
出处
《石油化工》
CAS
CSCD
北大核心
2015年第7期791-797,共7页
Petrochemical Technology
基金
国家自然科学基金重点项目(20836006)
关键词
复合膜
气体分离
二氧化碳
水滑石
聚乙烯亚胺-环氧氯丙烷共聚物
聚砜超滤膜
composite membrane
gas separation
carbon dioxide
hydrotalcite
polyethyleneimine-epichlorohydrin copolymer
polysulfone ultrafiltration membrane
