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Open AccessArticle

Effects of Surface Functional Groups on the Adhesion of SiO2 Nanospheres to Bio-Based Materials

School of Perfume and Aroma Technology, Shanghai Institute of Technology, No.100 Haiquan Road, Shanghai 201418, China
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Nanomaterials 2019, 9(10), 1411; https://doi.org/10.3390/nano9101411
Received: 18 September 2019 / Revised: 28 September 2019 / Accepted: 1 October 2019 / Published: 3 October 2019
The interactions between nanoparticles and materials must be considered when preparing functional materials. Although researchers have studied the interactions between nanoparticles and inorganic materials, little attention has been paid to those between nanoparticles and bio-based protein materials, like leather. In this study, organically modified silica nanospheres (SiO2 nanospheres) loaded with rose fragrance were prepared using (3-aminopropyl) triethoxysilane (APTES), (3-mercaptopropyl) triethoxysilane (MPTES), or 3-(2, 3-epoxypropyloxy) propyl triethoxysilane (GPTES) using the sol-gel method. To study the interactions between the modified SiO2 nanospheres and leather, a non-cross-linking adsorption experiment was conducted. According to the Dubinin–Radushkevich isotherm calculation, we found that the adsorption process of leather fiber and organically modified silica nanospheres is physical. The average adhesion energies of APTES-, MPTES-, and GPTES-modified SiO2 nanospheres on the leather are 1.34016, 0.97289, and 2.09326 kJ/mol, respectively. The weight gain, adsorption capacity, and average adhesion energy show that the modified SiO2 nanospheres can be adsorbed on leather in large quantities. The sensory evaluation confirmed that GPTES-modified SiO2 nanospheres endowed the leather with an obvious rose aroma.
Keywords: nanospheres; surface; organically modified silica; leather; isothermal adsorption; interaction nanospheres; surface; organically modified silica; leather; isothermal adsorption; interaction
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Xiao, Z.-B.; Xu, J.; Niu, Y.-W.; Zhu, G.-Y.; Kou, X.-R. Effects of Surface Functional Groups on the Adhesion of SiO2 Nanospheres to Bio-Based Materials. Nanomaterials 2019, 9, 1411.

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