Preparation of PVAm mixed matrix membranes by incorporating halloysite nanotubes for CO<sub>2</sub>/N<sub>2</sub> separation

HOU Mengjie; ZHANG Xinru; WANG Yonghong; LI Jinping; LIU Chengcen; LING Jun

doi:10.11949/j.issn.0438-1157.20180420

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Preparation of PVAm mixed matrix membranes by incorporating halloysite nanotubes for CO₂/N₂ separation

更新时间：2025-12-10

- Preparation of PVAm mixed matrix membranes by incorporating halloysite nanotubes for CO₂/N₂ separation
- CIESC Journal Issue 9, Pages: 4106-4113(2018)
- 作者机构：
  
  1. 太原理工大学化学化工学院,山西,太原,030024
  2. 气体能源高效清洁利用山西省重点实验室,山西,太原,030024
  3. 云南中烟工业有限责任公司技术中心,云南,昆明,650231
- 作者简介：
- 基金信息：
- DOI：10.11949/j.issn.0438-1157.20180420
  CLC： Q028.8
- Online First：05 September 2018，
  
  Published：05 September 2018
- 稿件说明：
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HOU Mengjie, ZHANG Xinru, WANG Yonghong, et al. Preparation of PVAm mixed matrix membranes by incorporating halloysite nanotubes for CO₂/N₂ separation[J]. CIESC Journal, 2018, (9): 4106-4113. DOI: 10.11949/j.issn.0438-1157.20180420.
DOI：

HOU Mengjie, ZHANG Xinru, WANG Yonghong, et al. Preparation of PVAm mixed matrix membranes by incorporating halloysite nanotubes for CO₂/N₂ separation[J]. CIESC Journal, 2018, (9): 4106-4113. DOI: 10.11949/j.issn.0438-1157.20180420. DOI：

摘要

制备高性能的气体分离膜，是实现CO2高效回收的关键。为了提高CO2分离膜的性能，将中空管状结构的埃洛石纳米管（HNTs）添加到聚乙烯胺（PVAm）中配制涂膜液，并将PVAm-HNTs涂膜液涂覆到聚砜（PSf）超滤膜上制备PVAm-HNTs/PSf混合基质膜。其中PSf超滤膜作为支撑层，PVAm-HNTs致密涂层作为功能层，功能层结构与形态对CO2分离具有关键作用。采用XRD、SEM对HNTs的结构与形态进行表征，并借助FTIR和SEM对膜的形态与结构进行分析。在进料气为纯气条件下，系统地研究了HNTs添加量、进料压力、PVAm-HNTs涂层厚度对PVAm-HNTs/PSf膜的CO2分离性能影响，并考察了混合基质膜的CO2/N2混合气分离性能。结果显示：在水溶液中显示正电性的PVAm与负电性的HNTs具有较好的界面相容性。HNTs添加量为1%（质量）、PVAm-HNTs湿涂层厚度为50 μm的混合基质膜，表现出最优的CO2分离性能。在进料气压力为0.1 MPa、测试温度为25℃、CO2/N2（15/85，体积比）混合气进料的条件下，膜的CO2渗透速率为178 GPU，CO2/N2选择性为83；该膜具有较好的稳定性，经过120 h运行后，渗透性和选择性仍能保持稳定。

Abstract

The preparation of gas separation membranes with high permselectivity is the key for CO2 efficient recovery. To improve the CO2 separation performance of membrane

halloysite nanotubes (HNTs) with hollow and tubular structure were incorporated into polyvinylamine (PVAm) aqueous solution to fabricate PVAm-HNTs coating solutions. PVAm-HNTs/polysulfone (PSf) mixed matrix membranes (MMMs) were prepared by coating PVAm-HNTs solutions on PSf ultrafiltration membranes. The PSf membrane is the supporting layer

and PVAm-HNTs coating layer is the functional layer

which is the key for CO2 separation. The structure and morphology of HNTs were characterized by XRD and SEM. The morphology and structure of the membranes were analyzed by FTIR and SEM. The effects of HNTs content

feed pressure

and the thickness of PVAm-HNTs coating layer were systematically investigated by using pure CO2 and N2 pure gas. The CO2/N2[15/85(volume)] mixed gas separation performance also were investigated. The good interfacial interaction is attributed to the electrostatic attraction between PVAm and negatively charged HNTs. At testing temperature of 25℃ and feed gas pressure of 0.1 MPa

PVAm-HNTs/PSf-1%(mass) MMMs with wet coating thickness of 50 μm exhibited long-term performance stability

and the CO2separation performance maintained high CO2 permeability of 178 GPU with CO2/N2 selectivity of 83 for CO2/N2 mixed gas over 120 h.

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Preparation of PVAm mixed matrix membranes by incorporating halloysite nanotubes for CO2/N2 separation

DOI：10.11949/j.issn.0438-1157.20180420

摘要

Abstract

关键词

Keywords

references

Preparation of PVAm mixed matrix membranes by incorporating halloysite nanotubes for CO₂/N₂ separation