Fig. 2: PP-infiltrated textile programmed by laser.
From: Laser-programmed stiffness and interfaces for textile hybrid electronics
a Mass increments between PP-infiltrated textile and original textiles (10 × 10 mm2). b Photos and SEM images of textiles with varied amounts of PP. The bottom left image is presented in false color, with the PP between the yarns colored blue. Images shown are representative of 5 independent replicates, all of which exhibit similar morphology. c Strength-strain curves of textiles with varied amounts of PP. Strength denotes force per unit width. d Mechanical parameters of textiles with varied amounts of PP. T toughness; Y Young’s modulus. Error bars are presented as mean ± SD for n = 3 independent experiments. e Schematics showing the formation of laser speckle on textiles. UV, ultraviolet. FDTD simulations of electric field strength where a Gaussian beam is incident onto (f) a plane and g a textile yarn. E0: electric field strength of incident beam. h Average Poynting flux in the plane and yarn along the horizontal axis. P Poynting flux. i Photos of laser speckles on textiles under varied incident powers. j Photos showing the minimum polymerized region by laser. The dashed lines indicate the boundaries of laser pretreatment. k Photos showing LPTs with various patterns at the strain of 20%. LPT, laser-programmed textile. l, m (l) Representative strength-strain curves and (m) Young’s modulus of PP-infiltrated textiles programmed by lasers at varied scanning speeds. Asterisks indicate the selected laser parameters used for fabricating LPTs and LPTHE. Y: Young’s modulus. Laser power: 21.5 mW; Line spacing: 40 μm. Error bars are presented as mean ± SD for n = 3 independent experiments. n Cytotoxicity of PP-infiltrated textiles programmed by lasers at varied scanning speeds. The ‘uncleaned’ sample is processed at a laser speed of 900 mm s-1. Control and original: a single sample is analyzed due to sample uniformity; Others: error bars are presented as mean ± SD for n = 3 independent experiments. o Air permeability and water vapor transmission rate of PP-infiltrated textiles programmed by lasers at varied scanning speeds. AP, air permeability; WVTR, water vapor transmission rate. Error bars are presented as mean ± SD for n = 3 independent experiments.
