Sol鈥揋el Application for Consolidating Stone: An Example of Project-Based Learning in a Physical Chemistry Lab
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- 作者：Desire茅 M. de los Santos ; Antonio Montes ; Antonio S谩nchez-Coronilla ; Javier Navas
- 刊名：Journal of Chemical Education
- 出版年：2014
- 出版时间：September 9, 2014
- 年：2014
- 卷：91
- 期：9
- 页码：1481-1485
- 全文大小：313K
- ISSN：1938-1328
文摘
A Project Based Learning (PBL) methodology was used in the practical laboratories of the Advanced Physical Chemistry department. The project type proposed simulates 鈥渞eal research鈥?focusing on sol鈥揼el synthesis and the application of the obtained sol as a stone consolidant. Students were divided into small groups (2 to 3 students) to simulate a real-world research team. This procedure allowed students to explore the sol鈥揼el transition from synthesis until dry gel (xerogel), and analyze the properties of the sol, gel, and xerogels (especially pore volume and pore size). Moreover, the students learned an example of an application of sol鈥揼el materials (as a 鈥渟tone consolidant鈥? and were introduced to the use of several instrumental techniques such as nitrogen adsorption, Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), mercury intrusion porosimetry (MIP), and rheology measurement.