Self‐healable and reprocessible liquid crystalline elastomer and its highly thermal conductive composites by incorporating graphene via in‐situ polymerization

Abstract

The booming of modern electronic devices featuring increasing power and multi-functionalization demands novel high thermal conductive materials with various functions, such as self-healing property and high deformability, while traditional polymer-based or metallic-based materials could hardly provide. Therefore, we report a high thermal conductive and disulfide-based selfhealable and reprocessible liquid crystalline elastomer (SHLCE) composite by incorporating graphene nanoplates (GNPs) fillers. The obtained GNPs/SHLCE composites exhibited desired thermal conductivity (5.08 Wm −1 K −1) when the content of GNPs was 20 wt% to the composites. Moreover, the GNPs/SHLCE composites showed intriguing recycled performance (Tensile strength after recycle could maintain over 93% compared with that of original composites). Furthermore, we concluded that the improved thermal conductivity of GNPs/ SHLCE composites was beneficial to the thermal induced reprocessible and shelf-healable systems.

Haptic perception using optoelectronic robotic flesh for embodied artificially intelligent agents

“…Temperature sensing can be enhanced by optimizing the number of thermochromic layers and their geometry for the desired range and resolution. Furthermore, higher thermal conductivity of the coatings (A and upper B) and thermochromic layers would result in faster thermal equilibrium of the system ( 47 – 50 ), thus allowing rapid temperature changes to be detected. Damage could be accumulated without losing sensitivity by using self-healing elastomers, but this is still an active area of research ( 51 – 53 ).…”

Toward Application of Liquid Crystalline Elastomer for Smart Robotics: State of the Art and Challenges

“…The exchange reaction leads to network rearrangement of the materials, providing new functions such as self-healing, welding, reprocessing, and some specific stimulus responsiveness for polymeric material. To address the adaptability and recyclability of LCEs, a number of novel chemical transformations, such as boronic ester exchange reaction [ 46 ], disulfide metathesis reaction [ 47 , 48 , 49 ], reversible addition fragmentation chain-transfer reactions [ 50 , 51 , 52 ], and siloxane exchange reactions [ 53 , 54 ], have been introduced into LCEs. The general reaction scheme and conditions of dynamic chemistries are given in Table 1 (g–o).…”

Structure–Function Relationships of Nanocarbon/Polymer Composites for Chemiresistive Sensing: A Review

“…Namely, they are in situ electro polymerization [ 49 ], solution/emulsion processing [ 50 ], vacuum-assisted self-assembly [ 51 ], in situ emulsion polymerization [ 20 ], a melt processing method [ 52 ], sol gel [ 53 ], electrochemical polymerization [ 54 ], an electro spinning method [ 55 ], melt electrospinning [ 56 ], melt mixing [ 57 ], and atom transfer radical polymerization [ 58 ]. The methods that are mostly reported for the preparation of nanocarbon/polymer composite chemiresistive layers are solution/emulsion mixing [ 59 , 60 ], self-assembly approaches [ 61 ], and in situ polymerization [ 62 , 63 ]. They are summarized below:…”