Self‐Adhesive Polydimethylsiloxane Foam Materials Decorated with MXene/Cellulose Nanofiber Interconnected Network for Versatile Functionalities

Abstract

Polydimethylsiloxanes (PDMS) foam as one of next‐generation polymer foam materials shows poor surface adhesion and limited functionality, which greatly restricts its potential applications. Fabrication of advanced PDMS foam materials with multiple functionalities remains a critical challenge. In this study, unprecedented self‐adhesive PDMS foam materials are reported with worm‐like rough structure and reactive groups for fabricating multifunctional PDMS foam nanocomposites decorated with MXene/cellulose nanofiber (MXene/CNF) interconnected network by a facile silicone foaming and dip‐coating strategy followed by silane surface modification. Interestingly, such self‐adhesive PDMS foam produces strong interfacial adhesion with the hybrid MXene/CNF nano‐coatings. Consequently, the optimized PDMS foam nanocomposites have excellent surface super‐hydrophobicity (water contact angle of ≈159o), tunable electrical conductivity (from 10−8 to 10 S m−1), stable compressive cyclic reliability in both wide‐temperature range (from −20 to 200 oC) and complex environments (acid, sodium, and alkali conditions), outstanding flame resistance (LOI value of >27% and low smoke production rate), good thermal insulating performance and reliable strain sensing in various stress modes and complex environmental conditions. It provides a new route for the rational design and development of advanced PDMS foam nanocomposites with versatile multifunctionalities for various promising applications such as intelligent healthcare monitoring and fire‐safe thermal insulation.

Electrical and Joule Heating Capabilities of Multifunctional Coatings based on Recycled Carbon Fiber from Prepreg Scrap

“…Besides, the interface between matrix and carbon fiber can be improved through the chemical reaction between the partially cured resin surrounding the fibers and the polymer matrix, which could lead to improved interfacial adhesion in the coating. This improved interfacial adhesion between polymer and reinforcement through chemical interaction in coatings has been observed by other authors in polymer coatings with different carbon-based reinforcements such as CNF/MXene or graphene oxide. , …”

“…This improved interfacial adhesion between polymer and reinforcement through chemical interaction in coatings has been observed by other authors in polymer coatings with different carbon-based reinforcements such as CNF/MXene or graphene oxide. 44,45 Higher magnification analysis of areas surrounding the fibers reveals a good interface between the fiber and matrix. shows two examples of matrix fibrillation during fiber pull-out, which was observed as one of the main strengthening mechanisms in Figure 3.…”

Mechanically Ductile, Self-Healable, Low-Temperature, and Water-Tolerant Polyurethane for High-Performance Strain Sensor

“…As the core module of smart wearable devices, the flexibility of tactile sensors is an important research direction for smart wearable devices. − Currently, PU films, as flexible substrates for sensors, are transparent, flexible, ductile, and bendable and have met most of the demand scenarios for sensors. However, due to the increasingly complex application environment of flexible sensors, more diverse properties of PU are being pursued.…”

Graphene Oxide and Hydroxyapatite Nanowire-Based Asymmetric Nanocomposite Papers with Heat-Induced Color and Resistance Switching for Dual-Mode Early Fire Warning

“…Upon exposure to flame, nonflammable gases such as CO 2 , H 2 O, and NH 3 are generated to dilute the concentration of the flammable gas, thereby inhibiting the combustion behavior. On the other hand, the thermal decomposition of the APTES molecules leads to the formation of organosilicon oligomers, subsequently creating a dense silica layer on the surface. , In addition, GO is thermally reduced into rGO. The resulting rGO/silica/HAp inhibits the transfer of heat and oxygen and thus protects paper from being broken by fire.…”

“…On the other hand, the thermal decomposition of the APTES molecules leads to the formation of organosilicon oligomers, subsequently creating a dense silica layer on the surface. 67,68 In addition, GO is thermally reduced into rGO. The resulting rGO/silica/HAp inhibits the transfer of heat and oxygen and thus protects paper from being broken by fire.…”