Synthesis of high temperature resistant ZrO2-SiO2 composite aerogels via “thiol-ene” click reaction
Source abstract
Abstract
We reported the preparation of a series of ZrO2-SiO2 composite aerogels via the sol-gel reaction between the zirconium source (ZrOCl2·8H2O) and the gel initiator (mercaptosuccinic acid-triethoxyvinylsilane). Such novel gel gelator was prepared by the thiol-ene click reaction using triethoxyvinylsilane (VTES) and mercaptosuccinic acid (MSA). The unique molecule structure of the gel initiator allows the in-situ modification of ZrO2 with SiO2 in the sol-gel reaction, which was achieved by the hydrolysis and polycondensation of siloxane with the change of the pH spontaneously. SiO2 with the controllable content can be in-situ introduced into ZrO2 backbone. As a result, the composite aerogel showed better thermal stability compared with pristine ZrO2 aerogel, proved by the following facts: (i) the aerogels remained amorphous after calcination in air at 600 °C; (ii) the specific surface area maintained at 53.4 m2/g when the temperature rising to 1000 °C.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Aerogels and thermal insulation · Surface Modification and Superhydrophobicity · Mesoporous Materials and Catalysis
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (33)
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