一步法合成氨基负载固体二氧化碳吸附材料
A One-Step Method for Preparing Amine-Loaded Solid CO2 Adsorption Materials
陈熹圣 1冀昕航 1李岚新 1邹威 1梁胜轲 2张晨1
作者信息
- 1. 北京化工大学材料科学与工程学院,北京 100029
- 2. 中国中化股份有限公司,北京 100031
- 折叠
摘要
将丙烯酸十八酯(OA)与支化聚乙烯亚胺(B-PEI)进行迈克尔(Michael)加成反应合成了PEI-OA两亲性接枝共聚物,将其作为大分子乳化剂引入浓乳液体系,利用乳液模板制得了氨基负载的聚苯乙烯多孔材料,实现了一步法制备氨基负载固体CO2吸附材料.研究了大分子乳化剂的结构、乳化剂用量,以及浓乳液的分散相体积分数对吸附材料的微观形貌及CO2吸附量的影响,结果表明,所制备的PEI-OA乳化剂更倾向于形成O/W型乳液,形成了颗粒紧密堆积型的多孔结构,并且多孔通道会随着乳化剂与分散相体积分数的改变而变化.采用气体吸附分析仪测定了氨基负载多孔聚合物材料的CO2吸附量,结果表明,PEI含量、乳化剂用量和分散相体积分数的适度增加均能提高产物对CO2的吸附量,吸附量最高可达到2.65 mmol/g.样品的循环性能测试显示,材料循环使用5次后吸附能力仅下降了0.15%,表明所制备的氨基负载二氧化碳吸附材料具有良好的工业应用前景.
Abstract
An amphiphilic PEI-g-OA copolymer(PEI-OA)was synthesized by Michael addition reaction between branched-polyethyleneimine(B-PEI)and octadecyl acrylate(OA),and then introduced into the concentrated emulsion as macromolecular emulsifier.A amine-loaded polystyrene(PS)porous polymer,which could be used as solid CO2 adsorption material,was prepared one-step via emulsion templating method.The effects of the macromolecular emulsifier,addition of emulsifier,and volume fraction of dispersed phase of concentrated emulsion on the micro morphology and then CO2 adsorption capacity of the porous polymers were studied.The result shows that the synthetic PEI-OA emulsifier tends to form O/W emulsion,and a porous structure constructed by dense particles was obtained.The porous channels could be controlled by the addition of emulsifier and dispersed phase volume fraction of concentrated emulsion.The CO2 adsorption capacities of amine-loaded porous polymers were measured by gas adsorption analyzer.The results indicate that the increase of PEI content,emulsifier addition,and dispersed phase volume fraction would improve the CO2 adsorption capacity,and the maximum adsorption capacity of 2.65 mmol/g is achieved.Moreover,the cyclic test result shows that the adsorption capacity is decreased by only 0.15% after 5 cycles.It is concluded that the porous polymer as-prepared amine-loaded CO2 adsorption material has a good industrial application prospect.
关键词
大分子乳化剂/一步法/乳液模板法/CO2吸附/氨基负载Key words
macromolecular emulsifier/one-step method/emulsion templating/CO2 adsorption/amine-loaded materials引用本文复制引用
出版年
2024
NETL
NSTL
万方数据