Surface Modification of Barium Sulfate Particles

• 作者: Jérémy Longlade Christelle Delaite Anne-Sophie Schuller
• 来源期刊: 材料科学与应用期刊(英文)
• 学科: 化学
• 关键词: Barium Sulfate Surface Modification Grafted Density
• 年，卷（期）: 2021,（1）
• 页码范围: 1-14
• 页数: 14页
• 分类号: O64

摘要

In this study, surface modification of barium sulfate was investigated using several model molecules for chemical treatment: ethanesulfonic acid, butyric acid, trimethoxy(propyl) silane and phosphoric acid 2-hydroxyethyl methacrylate. Samples were characterized by FT-IR and TGA to check the capability of these model molecules to interact with BaSO₄ surface. The results pointed out the presence of an organic layer around the surface after the chemical treatment even after several washings to remove all species in excess. Model molecules were grafted onto BaSO₄ surface and grafted density was determined. It reveals that phosphoric acid and carboxylic acid are the best candidates for the modification of BaSO₄ surface. Both can be used as anchoring groups to modify the hydrophilic balance of barium sulfate surface in order to avoid the formation of aggregates and to improve the compatibility of this filler within hydrophobic polymer matrix.