Work

Enhanced porosity and degradation behavior of porous KNN/PLA piezoelectric composites with C2H5OH addition

Year: 2025

Type: article

Abstract: The porous 0.3K 0.48 Na 0.52 NbO 3 /polylactic acid (KNN/PLA-P i , i = 0, 1, 2, 3, 4) composites were prepared using a nonsolvent-induced phase separation method. The effects of C 2 H 5 OH content on the porosity, degradation behavior and electroactivity of the composites were investigated. The addition of C 2 H 5 OH did not alter the phase composition of the obtained porous KNN/PLA-P i composites. However, it significantly increased the porosity and notably enhanced the degradation rate. Especially by adding 30 wt% C 2 H 5 OH, the obtained KNN/PLA-P 3 composite exhibited the optimal performance with a porosity of 69.5 %, a degradation weight loss rate (WLR) in water of 16.4 % after 28 d, a piezoelectric constant ( d 33 ) of 1.0 pC/N, a relative dielectric constant ( ε r ) of 5.5, and a water contact angle (CA) of 75.3° after polarization. These results give the underlying enlightenments needed for design and fabrication of electroactive bone repair composite, which match human bones well in terms of porosity and degradation rate.

Source: Ceramics International

DOI: 10.1016/j.ceramint.2025.04.236