The desire for this lightweight and flexible electronics has grown increasingly, and the flexible and wearable electronic textiles can be realized by coating traditional textiles with conductive materials. Here, the conductive silk fabrics are prepared by coating graphene oxide (GO) onto silk fabrics and followed by thermal reduction. The scanning electron microscope results show that the GO coated onto silk fabrics successfully forms a continuous thin film. The oxygen functional groups are removed by thermal reduction. The main structure (β‐sheet structure) of silk fabrics is not destroyed through a series of treatment, guaranteeing good mechanical properties. The resistivity and conductivity of silk fabrics using regenerated silk fibroin as a glue can reach 3.28 KΩ cm−1, 3.06 × 10−4 S cm−1 respectively, which can meet the electron conductive requirement of wearable electronics. Thus, it can be used for sensors, portable devices, and wearable electronic textiles.

Wound healing generally has four stages: hemostasis, inflammation, proliferation, and remolding. Most wound dressings only just take one or two phases into account. Herein, to develop a novel wound dressing that works at different stages, the blended alginate sodium/carboxymethyl chitosan membranes with a hydrogel-like structure are fabricated through a freeze-drying process together with a dual-ion (Sr2+ and Zn2+) cross-linking approach. The fabricated membranes show excellent properties in the swelling ratio, water vapor transmission rate, tensile strength, sustained release, cell adhesiveness, and biocompatibility, proving its general performance for application in wound healing. In particular, the membranes with optimal ion concentrations of 45 mM Sr2+ and 0.74 mM Zn2+ presented the antibacterial activity and accelerating function of wound healing. More specifically, the formation of epithelium and blood vessels is evidently advanced compared with a commercial dressing in vivo experiment, and the expression of main growth factors such as epidermal growth factor, basic fibroblast growth factor, vascular endothelial growth factor, and transforming growth factor is upregulated which also have good effects on the remolding of skin. The prepared wound dressings in this study have good effects on each stage of wound healing, which is important for the healing of chronic wounds. It provides more choices for wound healing, especially for chronic wound healing.

Wearable intelligent sensor materials have broad application prospects for human health detection and robot kinematics. 3D structure sensors have the advantages of high sensitivity, a wide detection range, and high strength, as is widely reported in existing research. Here, a sandwich structure involving an encapsulation layer, a 3D conductive network, and an encapsulation layer is prepared. Polyaniline acts as an active conductive filler for the 3D conductive network, while silk fibroin and poly (lactic‐co‐glycolic acid) are used to form a network for carrying conductive materials. Additionally, K‐carrageenan is added to encapsulate the 3D conductive network and prepare a high‐performance green skin sensor. The sensor exhibits high sensitivity (2.54 kPa−1) and a wide linear detection range (165.3 kPa). In addition, the pressure sensor possesses excellent durability (>2000 cycles) and a fast response time of 160 ms. Moreover, the sensor is compatible and biodegradable and encapsulated by a nontoxic water‐soluble polymer. On this basis, skin sensors for health monitoring systems and intelligent interactive systems are reported, thus enabling future applications in medical detection and human–machine interaction.

No abstract

No abstract

Recently, great efforts have been made to gain highly conductive fabrics for smart textiles and flexible electromagnetic shielding materials. Different from the conventional chemical synthesis method, fibrillar polypyrrole was synthesized on the cotton fabrics via a simple chemical polymerization process with micelles of cationic surfactant (cetyltrimethylammonium bromide, CTAB) as soft template. The modified cotton fabric exhibited excellent electrical conductivity and electromagnetic interference shielding effectiveness due to the formation of fibrillar polypyrrole on the fiber surface. Electrical conductivity of fabric surface were studied by four-probe resistivity system. The highly conductive fabric with surface conductivity of 5.8 S cm 21 could be obtained by changing cationic surfactant concentration. The electromagnetic interference shielding effectiveness (EMI SE) of the modified fabrics was evaluated by the vector network analyzer instrument. Compared with the sample without using surfactant, the EMI SE value of PPy-coated cotton fabrics increased by 28% after using 0.03 M CTAB as soft template.

No abstract

No abstract