Silica coating and photochemical properties of layered double hydroxide/4,4′-diaminostilbene-2,2′-disulfonic acid nanocomposite

Ahmed Mohamed El-Toni, Shu Yin, Tsugio Sato

研究成果: Article査読

19 被引用数 (Scopus)

抄録

Organic ultraviolet (UV) rays absorbents have been used as sunscreen materials, but they may pose a safety problem when used at high concentration. In order to prevent direct contact of organic UV rays absorbent to the human skin, a typical organic UV-absorbent, 4,4′-diaminostilbene-2,2′- disulfonic acid (DASDSA), was intercalated into Zn2Al layered double hydroxide (Zn2Al-LDH) by coprecipitation reaction. However, deintercalation of DASDSA from Zn2Al-LDH, by the anion exchange reaction with carbonate ion, was observed. Therefore, Zn2Al-LDH/ DASDSA was directly coated with silica by means of polymerization technique based on the Stöber method. Silica coating effectively depressed the deintercalation of DASDSA from Zn2Al-LDH. The amorphous silica was confirmed by XRD, SEM, TEM and FT-IR. The deintercalation behaviors as well as UV-shielding properties were investigated for coated particles.

本文言語English
ページ(範囲)449-454
ページ数6
ジャーナルJournal of Colloid And Interface Science
293
2
DOI
出版ステータスPublished - 2006 1月 15

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 生体材料
  • 表面、皮膜および薄膜
  • コロイド化学および表面化学

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