Depression of deintercalation of 4-hydroxy-3-methoxybenzoic acid from Zn2Al layered double hydroxide by direct coating with silica

Ahmed Mohamed El-Toni; Shu Yin; Tsugio Sato

doi:10.1016/j.matlet.2004.05.060

Depression of deintercalation of 4-hydroxy-3-methoxybenzoic acid from Zn₂Al layered double hydroxide by direct coating with silica

Ahmed Mohamed El-Toni, Shu Yin, Tsugio Sato

Division of Inorganic Material Research

Research output: Contribution to journal › Article › peer-review

13 Citations (Scopus)

Abstract

Organic ultraviolet (UV) ray absorbents have been used as sunscreen materials, but may pose a safety problem when used at high concentration. In order to prevent direct contact of organic UV ray absorbent to the human skin, a typical organic UV absorbent, 4-hydroxy-3-methoxybenzoic acid (HMBA) was intercalated into Zn₂Al layered double hydroxide (Zn ₂Al-LDHs) by coprecipiation reaction. The problem of deintercalation of organic molecules from LDHs by the anion exchange reaction with carbonate ion could be greatly depressed by forming a protection film of silica on the surface. Zn₂Al-LDH/4-hydroxy-3-methoxybenzoic acid was direct coated with silica by means of polymerization technique based on the Stöber method. The deintercalation behavior as well as UV-shielding properties was investigated for coated particles.

Original language	English
Pages (from-to)	3149-3152
Number of pages	4
Journal	Materials Letters
Volume	58
Issue number	25
DOIs	https://doi.org/10.1016/j.matlet.2004.05.060
Publication status	Published - 2004 Oct

Keywords

Coating
Deintercalation
Layered double hydroxide
Seeded polymerization
Silica
Ultraviolet absorbent

ASJC Scopus subject areas

Materials Science(all)
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

Access to Document

10.1016/j.matlet.2004.05.060

Cite this

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title = "Depression of deintercalation of 4-hydroxy-3-methoxybenzoic acid from Zn2Al layered double hydroxide by direct coating with silica",

abstract = "Organic ultraviolet (UV) ray absorbents have been used as sunscreen materials, but may pose a safety problem when used at high concentration. In order to prevent direct contact of organic UV ray absorbent to the human skin, a typical organic UV absorbent, 4-hydroxy-3-methoxybenzoic acid (HMBA) was intercalated into Zn2Al layered double hydroxide (Zn 2Al-LDHs) by coprecipiation reaction. The problem of deintercalation of organic molecules from LDHs by the anion exchange reaction with carbonate ion could be greatly depressed by forming a protection film of silica on the surface. Zn2Al-LDH/4-hydroxy-3-methoxybenzoic acid was direct coated with silica by means of polymerization technique based on the St{\"o}ber method. The deintercalation behavior as well as UV-shielding properties was investigated for coated particles.",

keywords = "Coating, Deintercalation, Layered double hydroxide, Seeded polymerization, Silica, Ultraviolet absorbent",

author = "El-Toni, {Ahmed Mohamed} and Shu Yin and Tsugio Sato",

note = "Funding Information: This research was partially supported by the Ministry of Education, Culture, Sports, Science and Technology, a Grant-in-Aid for the COE project (Giant Molecules and Complex Systems 2003).",

year = "2004",

month = oct,

doi = "10.1016/j.matlet.2004.05.060",

language = "English",

volume = "58",

pages = "3149--3152",

journal = "Materials Letters",

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T1 - Depression of deintercalation of 4-hydroxy-3-methoxybenzoic acid from Zn2Al layered double hydroxide by direct coating with silica

AU - El-Toni, Ahmed Mohamed

AU - Yin, Shu

AU - Sato, Tsugio

N1 - Funding Information: This research was partially supported by the Ministry of Education, Culture, Sports, Science and Technology, a Grant-in-Aid for the COE project (Giant Molecules and Complex Systems 2003).

PY - 2004/10

Y1 - 2004/10

N2 - Organic ultraviolet (UV) ray absorbents have been used as sunscreen materials, but may pose a safety problem when used at high concentration. In order to prevent direct contact of organic UV ray absorbent to the human skin, a typical organic UV absorbent, 4-hydroxy-3-methoxybenzoic acid (HMBA) was intercalated into Zn2Al layered double hydroxide (Zn 2Al-LDHs) by coprecipiation reaction. The problem of deintercalation of organic molecules from LDHs by the anion exchange reaction with carbonate ion could be greatly depressed by forming a protection film of silica on the surface. Zn2Al-LDH/4-hydroxy-3-methoxybenzoic acid was direct coated with silica by means of polymerization technique based on the Stöber method. The deintercalation behavior as well as UV-shielding properties was investigated for coated particles.

AB - Organic ultraviolet (UV) ray absorbents have been used as sunscreen materials, but may pose a safety problem when used at high concentration. In order to prevent direct contact of organic UV ray absorbent to the human skin, a typical organic UV absorbent, 4-hydroxy-3-methoxybenzoic acid (HMBA) was intercalated into Zn2Al layered double hydroxide (Zn 2Al-LDHs) by coprecipiation reaction. The problem of deintercalation of organic molecules from LDHs by the anion exchange reaction with carbonate ion could be greatly depressed by forming a protection film of silica on the surface. Zn2Al-LDH/4-hydroxy-3-methoxybenzoic acid was direct coated with silica by means of polymerization technique based on the Stöber method. The deintercalation behavior as well as UV-shielding properties was investigated for coated particles.

KW - Coating

KW - Deintercalation

KW - Layered double hydroxide

KW - Seeded polymerization

KW - Silica

KW - Ultraviolet absorbent

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