Poly(lactic acid)/Poly(butylene succinate) (PLA/PBS) Layered Composite Gas Barrier Membranes by Anisotropic Janus Nanosheets Compartibilizers

Abstract

Poly­(lactic acid) (PLA), one of the most promising biodegradable polymer products, has achieved wide applications for its relatively good mechanical properties and moderate degradability. Here we report an environment-friendly filler, the organic–inorganic composite Janus nanosheets (PLA/PBS JNs), which can jam at the interface of the PLA/PBS blend with a low threshold as the compatibilizer and can simultaneously toughen the composites and improve the gas barrier performance due to better interfacial interaction and tortuous path effect. With 0.3 wt % of PLA/PBS JNs added, the tensile strength and elongation at break of the PLA/PBS blend can be improved by 37% and 224%, respectively. After a further hot-pressing process, the barrier performance of the PLA/PBS composite membranes can be significantly enhanced since PLA, PLA/PBS JNs, and PBS are arranged in a nearly lamellar structure with oxygen permeability of 0.63 × 10–15 cm3 cm·cm–2 s–1 Pa–1 with only 0.5 wt % of PLA/PBS JNs.

Superior electrical conductivity and mechanical properties of phase‐separated polymer blend composites by tuning the localization of nanoparticles for electromagnetic interference shielding applications

“…Upon the addition of 0.3 wt% of PLA/PBS JNs, an improvement in tensile strength by 37% and elongation at break by 224% was obtained in the PLA/PBS blend. 51 It is clear that the migration of filler to the interface increases the mechanical and electrical properties. However, controlling the mechanism of transfer from one phase to the other phase is a major challenge.…”

A Quantitative Study on Branching Density Dependent Behavior of Polylactide Melt Strength

“…[1][2][3][4][5] Therefore, PLA has a great potential in the application of daily packaging, disposable products, biomedicine, and agricultural mulch film. [6][7][8][9][10][11] However, as a linear aliphatic polyester, PLA shows low melt strength which limit its application in casting, blowing, and foaming processes. [12][13][14][15] Attempts have been made to improve the melt strength of polymers such as increasing the molecular weight, widening the molecular weight distribution, cross-linking, and introducing long-chain branched (LCB) structures.…”

“…[ 1–5 ] Therefore, PLA has a great potential in the application of daily packaging, disposable products, biomedicine, and agricultural mulch film. [ 6–11 ] However, as a linear aliphatic polyester, PLA shows low melt strength which limit its application in casting, blowing, and foaming processes. [ 12–15 ]…”

Effect of addition of triallyl isocyanurate and post‐ultraviolet irradiation on the selected properties of composites of poly(lactic acid), poly(butylene succinate) and nano‐sized calcium carbonate

“…It is an ideal polyester for PLA modification because it toughens PLA while maintaining its own strength and improving PLA crystalline properties. [13][14][15][16] However, PLA and PBS have incompatible two-phase thermodynamics and small interface bonding, and PBS has excessive size when used as a dispersed phase size, which lead to no significant improvement in the overall properties of the resulting blends. In view of this, improving the compatibility of the blends and ensuring good PBS dispersion are particularly important to improve the performance of the blends.…”

“…PBS has good impact strength and high elongation at break. It is an ideal polyester for PLA modification because it toughens PLA while maintaining its own strength and improving PLA crystalline properties 13–16 . However, PLA and PBS have incompatible two‐phase thermodynamics and small interface bonding, and PBS has excessive size when used as a dispersed phase size, which lead to no significant improvement in the overall properties of the resulting blends.…”