Degradable MXene-Doped Polylactic Acid Textiles for Wearable Biomonitoring

Abstract

Degradable wearable electronics offer a promising route to construct sustainable cities and reduced carbon society. However, the difficult functionalization and the poor stability of degradable sensitive materials dramatically restrict their application in personalized healthcare assessment. Herein, we developed a scalable, low-cost, and porosity degradable MXene-polylactic acid textile (DMPT) for on-body biomonitoring via electrospinning. A combination of polydimethylsiloxane 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). An efficient degradation of as-electrospun DMPTs was observed in 1 wt % sodium carbonate solution. It is found that the incorporation of MXene nanosheets boosts the hydrophilicity and degradation efficiency of active polylactic acid nanofibrous films in comparison with the pristine counterpart. Furthermore, the as-received DMPT demonstrates great capability in monitoring physiological activities of wrist pulse, knuckle bending, swallowing, and vocalization. This work opens up a new paradigm for developing and optimizing high-performance degradable on-body electronics.

Electrically Conductive AgNPs/TPU-Electrospun Fibers with Hierarchical Microstructures by a One-Step Method for a High-Performance Flexible Pressure Sensor

“…Table S1 shows the sensitivity and R linearly with increasing pressure until it reached a nearly constant at around 100 kPa, reflecting that the sensor had a relatively wide linear detection range. 42 Moreover, the sensitivity also reached 1.72 kPa −1 , which is also a moderate value. These should be attributed to the special microstructure of the sensor.…”

“…It indicates that there is a good Ohmic contact between the nanofiber film and the fork finger electrode. 42 Figure 5e shows that the relative current changes of the AgNPs/TPU pressure sensor were able to respond significantly differently to the different loading pressures, which indicates that the sensor can distinguish and recognize different pressures by the relative current change. Figure 5f shows that the AgNPs/TPU pressure sensors were compressed sequentially at strains of 20, 40, 60, 80, 60, 40, and 20% at a loading rate of 50 mm/min.…”

“…The AgNPs/TPU nanofiber film was sandwiched between the PU tape protection layer and a flexible fork finger electrode with a polyimide substrate to assemble the AgNPs/TPU pressure sensor. 42 The film surface with the microstructures was covered with the forkfinger electrode. The assembly structure of the sensor is shown in Figure 1b.…”

Bioinspired and Biodegradable Functionalized Graphene Oxide/Deacetylated Cellulose Acetate Composite Janus Membranes for Water Evaporation-Induced Electricity Generation

“…However, silk fibroin and starch have limited applications in electronics due to their inferior mechanical properties. Likewise, the slow degradation rate, brittleness, and poor hydrophilicity of PLA restrict its potential applications . In contrast, cellulose is the most abundant bio-based polymer on Earth, with an annual production of approximately 100 billion tons. , It is widely found in the cell walls of plants and possesses hydroxyl groups that give it a high water transport capacity.…”

“…The present generators pose a substantial environmental threat as they comprise non-biodegradable materials and frequently contain dangerous elements such as mercury, arsenic, chromium, and lead. 24 Therefore, it is essential to develop degradable or recyclable power generators to minimize their environmental impact. Silk fibroin, starch, polylactic acid (PLA), and cellulose are among the most commonly used biodegradable materials.…”