化学学报 ›› 2011, Vol. 69 ›› Issue (22): 2648-2652. 上一篇    下一篇

研究论文

层层自组装结合后处理制备耐磨超亲水增透纳米粒子涂层

许利刚1,2,李晓禹1,2,贺军辉*,1   

  1. (1中国科学院理化技术研究所 功能纳米材料实验室 北京 100190)
    (2中国科学院研究生院 北京 100049)
  • 收稿日期:2011-05-27 修回日期:2011-06-27 出版日期:2011-11-28 发布日期:2011-08-24
  • 通讯作者: 贺军辉 E-mail:jhhe@mail.ipc.ac.cn
  • 基金资助:

    中科院重要方向性项目

Mechanically Durable Superhydrophilic Antireflective Nanoparticles Coatings via Layer-by-Layer Assembly Followed by Post-treatments

Xu Ligang1,2 Li Xiaoyu1,2 He Junhui*,1   

  1. (1 Functional Nanomaterials Laboratory, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190)
    (2 Graduate University of Chinese Academy of Sciences, Beijing 100049)
  • Received:2011-05-27 Revised:2011-06-27 Online:2011-11-28 Published:2011-08-24
  • Contact: Junhui He E-mail:jhhe@mail.ipc.ac.cn

通过层层自组装方法制备的二氧化硅纳米粒子涂层由于具有增透、超亲水的良好性质, 引起了广泛关注. 然而, 这种涂层的耐磨性往往达不到实际应用的要求. 本工作尝试通过后处理来增强涂层耐磨性. 首先采用自制二氧化硅纳米颗粒, 聚二烯丙基二甲基氯化铵(PDDA)和聚苯乙烯磺酸钠(PSS), 通过层层自组装制备了PDDA/SiO2纳米粒子涂层, 其中(PDDA/SiO2)6涂层透过率最高. 随后将(PDDA/SiO2)6涂层依次经过124 ℃水热处理1 h和700 ℃快速淬火200 s处理, 得到同时具有超亲水性和增透性的涂层, 其中(PDDA/SiO2)6涂层在可见光范围内最大透过率高达99.0%. 实验表明, 这种后处理也极大地提高了涂层的耐磨性.

关键词: 增透, 超亲水, 水热, 快速淬火, 静电层层自组装, 耐磨

Silica nanoparticles coatings assembled via layer-by-layer (LbL) assembly have attracted much attention because of their superhydrophilic and antireflective properties. However, the mechanical durability of such coatings is usually not sufficient for practical applications. The current work was carried out to improve the mechanical durability of the coatings by post treatments. Coatings were fabricated from silica nanoparticles, polyelectrolytes of poly(diallyldimethylammonium) chloride (PDDA) and sodium poly(4-styrenesulfonate) (PSS) via LbL assembly. Glass substrates covered with (PDDA/SiO2)6 coatings exhibited the highest transmittance. (PDDA/SiO2)6 coatings were sequentially subjected to hydrothermal treatment (124 ℃ for 1 h) and dynamic hardening (200 s), respectively. The as-treated coating exhibited both superhydrophilic and antireflective properties. A maximum transmittance of 99.0% was achieved in the visible range for the (PDDA/SiO2)6 coating. Meanwhile the mechanical durability of these coatings has been greatly enhanced by the post treatments.

Key words: antireflective, superhydrophilic, hydrothermal treatment, dynamic hardening, layer-by-layer assembly, mechanical durability