Beijing University of Chemical Tehcnology

Wuhan University

Wenying Shi

Xue Fei Duan

Min Wei

Jun Lu

Yanjun Lin

Shaopeng Wu

Jianying Yu

The present invention relates to a preparation method for a UV-shielding material based on Mg&#x2014;Al Layered Double Hydroxide. The material with multi-layered overlay structure is made from Mg&#x2014;Al double hydroxide layers and interlayer carbonate, its molecular composition is: MgAl(OH)(CO).mHO. The inorganic layers of this material can play a physical shielding role against UV, and the metal elements dispersed on the layer as well as the interlayer anion can play a great role in the chemical absorbing. In addition, by controlling the particle size and the amount of the layers, UV light can be effectively shielded by multi-level reflection and absorption of the multi-level layered structure. Therefore, the material with multi-level chemical and physical shielding properties has a good UV barrier effect for the anti-ageing asphalt, and could significantly increase its UV resistance properties.

UV-shielding material based on Mg&#x2014;Al layered double hydroxide and its application in anti-ageing asphalt

This invention relates to the field of preparation technology of optical pH sensor by co-intercalated fluorescein and 1-heptanesulfonic acid sodium into layered double hydroxide. The sensor is composed by conductive materials and the surface LDH films by co-interacted FLU and HES. The synthesis method is: first: synthesis of LDH colloid suspension, subsequently, the FLU and HES co-intercalated LDH colloid solution was prepared following the ion-exchange method, then the thin film of FLU-HES/LDH was spreaded on the surface of the conductive material by electrophoretic deposition, and the oriental pH sensor was synthesized. The advantages of the present invention is: first, the LDH matrix provides chromophore molecules with a confined and stable environment; the novel electrophoretic deposition strategy in this work provides a method for precise control of thickness (ranging from nanometers to micrometers), and the oriental pH sensor show good pH responsive.

Preparation of an optical PH sensor based on fluorescein and 1-heptanesulfonic acid sodium Co-intercalated layered double hydroxide

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Beijing, China

Wenying Shi