小角X射线散射测量高分子薄膜亚纳米孔径

丁思远; 王雪; 汪茂; 沈文皓; 刘峰; 王宇钢

doi:10.11889/j.0253-3219.2018.hjs.41.120102

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小角X射线散射测量高分子薄膜亚纳米孔径

同步辐射技术及应用 | 更新时间：2021-05-19

- 小角X射线散射测量高分子薄膜亚纳米孔径
- SAXS measurements of polymeric sub-nanometer pores
- 核技术 2018年41卷第12期文章编号：120102
- 作者机构：
  
  1.北京大学核物理与核技术国家重点实验室北京 100871
  2.北京大学定量生物学中心北京 100871
- 作者简介：
  
  [ "丁思远, 女, 1993年出生, 2016年毕业于中国科学技术大学, 现为硕士研究生, 研究方向为基于离子径迹法制备高分子纳米孔的结构表征", "DING Siyuan, female, born in 1993, graduated from University of Science and Technology of China in 2016, master student, focusing on structural characterizations of ion tracks based polymeric nano pores" ]
  王宇钢, E-mail:ygwang@pku.edu.cn WANG Yugang, E-mail:ygwang@pku.edu.cn
- 基金信息：
  
  国家自然科学基金(11335003)
- DOI：10.11889/j.0253-3219.2018.hjs.41.120102
  中图分类号： TL99
- 收稿日期：2018-07-20，
  
  修回日期：2018-09-11，
  
  纸质出版日期：2018-12-10
- 稿件说明：
移动端阅览
丁思远, 王雪, 汪茂, 等. 小角X射线散射测量高分子薄膜亚纳米孔径[J]. 核技术, 2018,41(12):120102

Siyuan DING, Xue WANG, Mao WANG, et al. SAXS measurements of polymeric sub-nanometer pores[J]. Nuclear techniques, 2018, 41(12): 120102
丁思远, 王雪, 汪茂, 等. 小角X射线散射测量高分子薄膜亚纳米孔径[J]. 核技术, 2018,41(12):120102 DOI： 10.11889/j.0253-3219.2018.hjs.41.120102.

Siyuan DING, Xue WANG, Mao WANG, et al. SAXS measurements of polymeric sub-nanometer pores[J]. Nuclear techniques, 2018, 41(12): 120102 DOI： 10.11889/j.0253-3219.2018.hjs.41.120102.

摘要

近年来，纳米级至亚纳米级孔道在离子选择性输运上的研究得到了极大的关注，也取得了很大的进展。本课题组利用所发明的新方法所制备的对苯二甲酸乙二醇酯纳米孔薄膜，具有尺寸结构相对较统一的纳米孔和优异的离子输运性能。确定其纳米孔的尺寸和结构对于更好地了解其输运机理，进而改进制备工艺，有着极大的推动作用。本工作沿用9.5 MeV·u

-1

的铋离子辐照聚对苯二甲酸乙二醇酯薄膜，注量从5×10

-2

到5×10

-2

不等，之后进行充分紫外照射等处理。通过上海同步辐射光源X射线小角散射实验（Small Angle X-ray Scattering，SAXS）获得了样品的散射图，应用改进的圆柱（hard cylinder）模型和核壳（core shell）模型对散射图谱进行拟合与分析，发现对于完成制备的样品，改进的核壳模型与实验数据具有非常好的一致性。拟合结果表明：完成制备后的纳米孔有径迹核和边缘壳精细结构，且核的半径为0.5~0.6 nm，壳的厚度为7~8 nm。

Abstract

Background

Recent researches focusing on seeking excellent ionic permeability and selectivity in a nanoscale or even sub-nanometer scale have made great progress. Notably

we have established a new technique to fabricate uniform-sized nanopores in polyethylene terephthalate (PET) films

which shows great performance in ion transport.

Purpose

This study aims to apply small angle X-ray scattering (SAXS) measurement to investigate the track structures in different fabrication stages.

Methods

Nonporous membranes were fabricated by irradiating PET films with 9.5 MeV·u

-1

Bi in the range of 5×10

-2

to 5×10

-2

followed by UV treatment and adequate infiltration. Structures of fabricated samples were measured at SAXS beamline of Shanghai Synchrotron Radiation Facility (SSRF) to obtain scattering spectra. Modified hard cylinder model and core shell model were employed to fit and analyze scattering spectra of samples in and after all fabrication procedures.

Results

The fitting results showed that the nanopore in the final fabrication stage has a fine structure of 0.5~0.6 nm and a shell of 7~8 nm in radius.

Conclusion

The SAXS techniques can be used to obtain the structure information of polymeric sub-nanometer pores.

关键词

Keywords

references

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