Muscle-like self-strengthening poly(vinyl alcohol)/cellulose/MXene composite hydrogel by mechanical training for wearable electronics.

The development of mechanically tunable and self-strengthening hydrogels for advanced electronic applications is highly desirable but remains a challenge. Muscles, as force-bearing tissues, could autonomously grow to adapt to the surrounding environment through cyclic disassembly and reconstruction of muscle fibers by mechanical training. Inspired by this biological feature, we presented a mechanical training enhancement strategy for preparing self-strengthening conductive composite hydrogels.

Conjugated Polyelectrolyte with Long-Range Ordering and Compact Molecular Packing as Hole-Transporting Material for Efficient and Flexible Organic Solar Cells.

Hole-transporting layer (HTL) materials with a non-corrosive nature and good compatibility with flexible electrodes are highly desirable for advancing efficient and flexible organic solar cells (OSCs). Conjugated polyelectrolytes (CPEs) exhibit intriguing advantages as HTLs, such as tunable properties and excellent solution processability, but they suffer from poor charge-transporting properties, resulting in inferior performance to traditional HTLs. Herein, a series of pH-neutral CPEs are designed and synthesized that can form enhanced crystalline and highly ordered films.

Designing ultrasensitive mechanochromic pure cellulose nanofiber hydrogels via simple and feasible gas phase coagulation.

Nanoellulose-based mechanochromic materials represent a frontier in sustainable optics, offering a renewable platform for advanced functional materials. However, the precise manipulation of cellulose nanofibers (CNFs) into intelligent optical systems remains challenging due to their inherent variability in size and the difficulty of achieving controlled orientation. Herein, we developed a straightforward and scalable strategy to construct mechanochromic CNF hydrogels (MCNFHs) with engineerable interference colors (ranging from yellow, red, blue, green) under compressive stress by exploiting their response to acidic vapor, that is, via simple and feasible gas phase coagulation.

Preparation of strong, UV-blocking and sustainable glucose-cross-linked cellulose plastics via hydroxyl-yne click reaction.

The construction of functional cellulose plastics possessing strong UV-blocking, hydrophilicity, and biodegradability is challenging. Therefore, we provide a novel strategy to successfully prepare sustainable and hydrophilic glucose-cross-linked cellulose (GC) plastics showing effective UV-blocking and excellent mechanical properties via hydroxyl-yne click reaction at room temperature. The results demonstrated that hydroxyl-yne click chemistry enabled efficient crosslinking of cellulose with glucose using 4-dimethylamino pyridine (DMAP) as a catalyst.