Degradation behaviour of plasticized PLA/CNTs nanocomposites prepared by the different technique of blending

Abstract

The present research goals to investigate how the preparation technique became the factor to develop materials with a good combination of properties and optimum degradation ability. PLA/CNTs nanocomposites were prepared via melt blending and solution blending that were involved of unmodified carbon nanotubes (CNTs) and modified CNTs (mCNTs) at 1.5 wt.% loading. The surface morphology of nanocomposites was viewed by Field Emission Scanning Electron Microscopy (FESEM). The effect of 5 wt.% poly (ethylene glycol) (PEG) as plasticizer on nanocomposites were determined. The weight loss in soil degradation study was run for 6 months. The morphology study by FESEM confirmed the finding through the existence of a smooth fracture surface especially when PEG was loaded. In soil degradation analysis, neat PLA exhibited a low weight loss rate after 6 months. The maximum weight loss for both techniques was shown by PLA/PEG/CNTs from melt blending technique and PLA/PEG/mCNTs from solution blending, believed from the pore occurred bring to poor properties.

Degradable MXene-Doped Polylactic Acid Textiles for Wearable Biomonitoring

“…Interesting, the absorbing intensity ratios of the −COC– group to the −CO group of the DMPT mostly remain the same before and after degradation, as shown in Figure d. This is because partially decomposed PLA is gradually dissolved in the degradation solution and the enhanced hydrophilicity of the DMPT will promote the degradation of PLA . The contact angles of the DMPT as a function of immersing times are shown in Figure S2.…”

“…This is because partially decomposed PLA is gradually dissolved in the degradation solution and the enhanced hydrophilicity of the DMPT will promote the degradation of PLA. 40 The contact angles of the DMPT as a function of immersing times are shown in Figure S2.…”

“…The metallic conductivity and layer spacing architecture endow MXene flakes with great adjustable and adaptive resistance sensing behaviors in response to external strain and stress . Furthermore, an intuitive and logical approach is development of composites by incorporating the hydrophilic and conductive MXene nanosheets into a PLA scaffold in order to facilitate the decomposing efficiency and mechanical robustness …”

“…39 Furthermore, an intuitive and logical approach is development of composites by incorporating the hydrophilic and conductive MXene nanosheets into a PLA scaffold in order to facilitate the decomposing efficiency and mechanical robustness. 40 Herein, we invented a scalable, low-cost, and porosity degradable MXene-PLA textile (DMPT) for on-body biomonitoring via electrospinning. A combination of polydimethylsiloxane (PDMS) templating and MXene flake impregnation methods endows the fabricated DMPT with a sensitivity of 5.37/kPa, a fast response time of 98 ms, and a good mechanical stability (over 6000 cycles).…”