POS7-0212
Highly anti-impact polydiboronsiloxane nanocomposites via interfacial interaction modulation
Topic
S7. Innovations in Polymeric Composites: From Design and Processing to Industrial Applications
When and Where
Sep 30, 2026
08:30 - 09:30
Room 301 (Grand Ballroom)
Session Chairs
Heesuk KIM
Jinhye BAE
Presenter(s)
Yujia Hou (College of Polymer Science and Engineering, State Key Laboratory of Advanced Polymer Materials, Sichuan University)
Co-Author(s)
Abstract
Various impacts are ubiquitous in transportation, electronic devices and other fields in the modern complex environment, which can cause health hazards and property losses. To protect increasingly broad and sophisticated targets, developing novel polymeric protective materials that combine impact resistance, flexibility and comfort is crucial. Several studies have attempted to improve impact resistance and energy dissipation properties via utilizing dynamic covalent and non-covalent interactions (hydrogen bonds, coordination bonds, ionic bonds, etc.). However, these methods usually involve specific molecular structure design, sophisticated synthesis and difficulty of further improvement in impact pretection ability. Herein, we prepare the highly anti-impact nanocomposites based on boron-oxygen dynamic bonds by complexing polydiborosiloxane with different types of nanofillers and modulating the interfacial interaction. The nanocomposites show good compatibility because of the interfacial interactions between the nanofillers and the matrix. Thus, the tensile strength of the composite can reach 1.1 MPa after incorporating nanofillers, which is 61 times higher than that of the polydiborosiloxane matrix. In falling-ball impact tests, the nanocomposite dissipates 91.5% of the external impact force, showing excellent impact protection. When subjected to the same impact force, the transmitted maxium force of the nanocomposite as a buffer material is only about 21.6% of that of polydiborosiloxane, and the buffer time of the nanocomposite is longer. In addition, with the increasing nanofillers content, the composites gradually change from viscous to elastic and the mechanical properties are enhanced, while the anti-impact properties first improve and then slightly decrease. Nevertheless, the nanocomposites exhibit a significant improvement in overall mechanical strength and anti-impact properties compared to polydiborosiloxane.
