Xuemin Yu,Zhu Xiong,Jinglong Li,Ziyang Wu,Yunze Wang,Fu Liu
Poly(lactic acid) (PLA) has attracted growing attention as a sustainable and environmentally benign membrane material. The good biocompatibility/hemocompatibility is essential for hemodialysis membranes. To circumvent the inadequate hydrophilicity/biocompatibility/hemocompatibility, we have developed a feasible strategy that enables the persistent PEGylation on PLA membranes via micro-swelling and subsequent UV-initiated crosslinking of poly(ethylene glycol)diacrylate (PEGDA). The content of DMSO and PEGDA in the reaction solution was crucial to control the surface PEGylation kinetics. Besides, the influence of PEGylation on membrane chemistry, morphology, hydrophilicity, water flux and dynamic fouling resistance to BSA was investigated. It was demonstrated that the biocompatibility/hemocompatibility was significantly improved by the surface PEGylation in terms of reduced BSA adsorption, extended APTT and alleviative platelet adhesion.
Xiaokang Ma,Jingyu Kang,Tianyi Zhang,Xiaoyu Hao,Ming Jiang,Ruisheng Guo,Zhaozhu Zhang,Xuqing Liu
Nanoscale surface architecturing of high-performance organic fibers offers a viable avenue for enhancing interfacial adhesion and imparting additional functionality to fiber-reinforced polymer composites. Herein, the Micro-Swelling-Induced Nanoscale Hydrogen-Bond Network (MiNaHN) strategy is introduced, which integrates a robust nano-interface with the aramid backbone while preserving fiber integrity. The mild solvent-assisted micro-swelling treatment locally unlocks intermolecular hydrogen bonds, revealing amide sites that guide multivalent hydrogen-bonded self-assembly of 3-amino-1,2,4-triazole-functionalized reduced graphene oxide. Concomitantly, aramid nanofibers dispersed in phenolic matrix establish complementary bonding with both the resin and the modified fibers. The resulting architecture forms a continuous and dynamic hydrogen-bond network that bridges the fiber–matrix interface and the surrounding matrix. This integrated nano-interface raises the tensile strength of aramid/polytetrafluoroethylene fabric composites by 71.9%, while lowering the wear volume and friction coefficient by 45.4% and 31.5%, respectively. Microscopic and spectroscopic analyses show that the nanostructure promotes durable tribofilm formation and efficient stress dissipation without compromising the intrinsic properties of fibers. The MiNaHN strategy delivers a scalable route for activating chemically inert organic fibers through molecularly connected nano-interfaces and is broadly applicable to composite systems that require simultaneous gains in mechanical robustness and tribological stability.
危险品化学品经营许可证（带存储）