Preparation and photochromic properties of NiAl-NO3-LDHs/LDPE composite
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- 作者：Kyuhaeng Cho (1)
YanJun Lin (1)
David G. Evans (1)
DianQing Li (1) - 关键词：photochromism ; composite ; NiAl ; NO3LDHs ; polyethylene (LDPE)
- 刊名：Chinese Science Bulletin
- 出版年：2007
- 出版时间：April 2007
- 年：2007
- 卷：52
- 期：7
- 页码：877-882
- 全文大小：1009KB
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YanJun Lin (1)
David G. Evans (1)
DianQing Li (1)
1. State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing, 100029, China - ISSN：1861-9541
文摘
Nanoscale NiAl-NO3-LDHs with good crystallinity have been synthesized by a method, Separate Nucleation and Aging Steps (SNAS). An NiAl-NO3-LDHs/LDPE composite was prepared by blending NiAl-NO3-LDHs and LDPE in a heated double-roller mixer. The color of this composite changed from olive green to steel gray under UV irradiation. After heating at 80°C for 2 h, the color returned to olive green. The effect of varying the amount of added NiAl-NO3-LDHs and UV exposure time on the photochromic properties of the composite has been investigated. The results showed that the photochromic phenomenon becomes more apparent with increasing amount of NiAl-NO3-LDHs. When the amount reaches 5%, the composite exhibits good photochromic properties and reproducibility. The color change rate of the composite reaches a maximum when the irradiation time exceeds 20 min. The addition of LDPE improves the photochromic cyclability of NiAl-NO3-LDHs significantly. The addition of nanoscale NiAl-NO3-LDHs also improves the mechanical properties of LDPE to some extent.