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While stimuli-responsive materials can be preparedviamany established procedures, digital light processing (DLP) 3D printing offers a simple and robust technique for the fabrication of hydrogels, including spatially-defined bilayer systems. 

Catalyst-free, bulk oxidation of low-density polyethylene (LDPE) can be achieved with non-thermal atmospheric plasmaviaa viscosity modifier approach, enabling compatibilization in mixed polymer blends. 

Thermomechanical properties are tuned by varying diacrylate content and size in lignin-derivable networks, highlighting the design of processable, fully renewable, and performance-driven (meth)acrylate networks using network engineering approaches. 

This work highlights the potential of lignin-derivable compounds for the development of bio-derivable polysulfones with improved hydrophilicity due to the functionality (methoxy groups) of lignin-aromatics. 

The development of vitrimers with dynamic covalent bonds enables reprocessability in crosslinked networks, offering a sustainable alternative to conventional thermosets. In this work, a thiol-acrylate vitrimer was synthesized from lignin-derivable (bis)phenols (guaiacol and bisguaiacol F) and compared to a control derived from petroleum-based precursors (phenol and bisphenol F) to investigate the effect of structural differences on network properties and thermal reprocessing. The presence of methoxy groups in the lignin-derivable vitrimer promoted intermolecular interactions by serving as additional hydrogen bonding acceptors during curing, leading to a denser network, as evidenced by a higher rubbery storage modulus (∼2.4 MPa vs. ∼1.4 MPa) and glass transition temperature (∼34 °C vs. ∼28 °C). The lignin-derivable vitrimer exhibited a slightly higher elongation-at-break (∼170% vs. ∼130%) and improved mechanical robustness, including a nearly two-fold increase in Young's modulus (∼6.9 MPa vs. ∼3.4 MPa) and toughness (∼750 kJ m−3vs. ∼390 kJ m−3). The similar stress relaxation behavior and activation energy of viscous flow indicated comparable bond exchange dynamics between the two vitrimers, while the lignin-derivable system demonstrated higher thermal healing efficiency with improved recovery of tensile properties after reprocessing. These findings highlight the potential of lignin-based aromatics in designing mechanically robust and sustainable vitrimers, aligning with efforts to develop renewable and reprocessable polymeric materials. 

Peptide–polyurea hybrids (PPUs) demonstrate rapid hierarchical assembly into non-covalent hydrogels, which display tunable gel strength, shear recovery, and thermal stability.