Study on properties of photosensitive resins reinforced by KH570-modified needle-shaped wollastonite

Abstract

To enhance the mechanical and thermal properties of three-dimensional printing photopolymer resins, acicular wollastonite (AW) was initially activated with dilute hydrochloric acid followed by surface-modification with KH570. The modification was confirmed via SEM, FTIR, XPS, TG, and contact angle measurements, proving its successful chemical grafting. The modified AW (i.e., MAAW) was then blended into photosensitive resin (PR) at the weight contents of 3%–20% to fabricate MAAW/PR composites. At the MAAW loading of 9 wt.%, the composite’s tensile strength, elongation at break, and impact strength reached 38 MPa, 19%, and 13.5 kJ·m⁻², rising by 111%, 35%, and 170% compared with those of pure resin, respectively. Moreover, at the MAAW loading of 6 wt.%, the composite’s thermal decomposition and maximum decomposition temperatures were enhanced to 430.23 and 436.35 °C, respectively. This study demonstrates that such developed MAAW/PR composites exhibit outstanding strength, toughness, and thermal stability, offering a cost-effective and promising alternative to expensive carbon or glass fiber fillers in PR products.

Graphical abstract

Keywords

surface modification / photocuring / needle-shaped wollastonite / 3D printing / composite material

Rights & permissions

Higher Education Press