Modification of Polylactide Nonwovens with Carbon Nanotubes and Ladder Poly(silsesquioxane)

Abstract

Electrospun nonwovens of poly(L-lactide) (PLLA) modified with multiwall carbon nanotubes (MWCNT) and linear ladder-like poly(silsesquioxane) with methoxycarbonyl side groups (LPSQ-COOMe) were obtained. MWCNT and LPSQ-COOMe were added to the polymer solution before the electrospinning. In addition, nonwovens of PLLA grafted to modified MWCNT were electrospun. All modified nonwovens exhibited higher tensile strength than the neat PLA nonwoven. The addition of 10 wt.% of LPSQ-COOMe and 0.1 wt.% of MWCNT to PLLA increased the tensile strength of the nonwovens 2.4 times, improving also the elongation at the maximum stress.

Recent progress in ladder-like polysilsesquioxane: synthesis and applications

“…82,83 Based on these advantages, researchers have employed LPSQ as an additive or filler in polymer resins to enhance mechanical properties [84][85][86][87] and impart specific functionalities. [88][89][90][91][92] LPSQ is currently under active investigation as a base material for use in applications where POSS has encountered challenges, such as in hard coatings with various functionalities, [93][94][95][96][97] gate dielectrics, 82,[98][99][100][101] battery separators, [102][103][104] ionic liquid gelators, 34,105,106 and gas separation membranes, [107][108][109] thereby broadening the range of applications of silsesquioxanes (Fig. 1c).…”

Biomaterials for Soft Tissue Repair and Regeneration: A Focus on Italian Research in the Field

“…Aliphatic polyesters are representatives of synthetic biodegradable polymers. The most commonly used for tissue repair and regeneration are polylactide (PLA), polyglycolide (PGA), poly(ε-caprolactone) (PCL), their copolymers and derivatives by PEG or other polymers and materials [ 198 , 199 , 200 , 201 ]. These polymers have been widely studied for decades in drug delivery applications such as microparticles, NPs, implants and several pharmaceutical products are on the market [ 202 , 203 ].…”

Phase Structure and Properties of Ternary Polylactide/Poly(methyl methacrylate)/Polysilsesquioxane Blends

“…We have recently found that linear, ladder-like polysilsesquioxanes (LPSQ-R) (Scheme 1) may be applied as interesting modifiers of PLA [44][45][46][47]. LPSQ-R are amorphous substances of low glass transition temperatures that are partially miscible with PLA [44][45][46].…”