Abstract Inspired by the anti‐freezing mechanisms found in nature, ionic compounds (ZnCl 2 /CaCl 2 ) are integrated into cellulose hydrogel networks to enhance the freezing resistance. In this work, cotton cellulose is dissolved by a specially designed ZnCl 2 /CaCl 2 system, which endows the cellulose hydrogels specific properties such as excellent freeze‐tolerance, good ion conductivity, and superior thermal reversibility. Interestingly, the rate of cellulose coagulation could be promoted by the addition of extra water or glycerol. This new type of cellulose‐based hydrogel may be suitable for the construction of flexible devices used at temperature as low as −70 °C.
This paper aims to the physical characteristics of rock mass in the course of rising from room temperature to 600C.The maximum stress is reduced from 29.95MPa to 15.65MPa when the temperature rises above 400 degrees, the modulus of elasticity decreased by even more than 90% between 250 and 400C.The rock Poisson ratio is gradually increasing when the temperature rises from 30 to 100C, the Poisson's ratio decreases sharply with the temperature rising from 100 to 300C.
At present,there are three psychology theories that explain the cause of autism: the lack of theory of the mind,the obstacle of executive function,and the weak centre coherence.By combining the current research achievements,this paper expatiates the relationship between these theories and autism,points out that the interaction of the three theories may explain the causes of autism, and proposes that combining behavior study with study on nerve process mechanism would be helpful to making an in-depth probe into the causes of autism.
Polymers have made great progress in the field of wearable flexible sensors due to their high flexibility, low cost, and lightweight. The exceptional mechanical properties and inherent self-healing capabilities enable the polymer sensor to function effectively in challenging operational environments. To achieve this, we employed o-aromatic diaminodisulfide and 1,3-dihydroxyacetone from biomass as key components to synthesize polyurethane urea elastomers rich in hydrogen bonds (named PUSS). The material exhibits strong mechanical characteristics (tensile strength >10 MPa, elongation at break >2000%, toughness >140 MJ m–3). The hydrogen bonding interactions of the materials were examined, confirming how they actively promote self-healing. By incorporating MXene and carbon nanofiber into the PUSS matrix, we developed a resistive sensor with robust mechanical properties, high sensitivity, and excellent self-healing capabilities. At room temperature, PUSS exhibited an impressive self-healing efficiency of 85.11% for tensile strength and 79.41% for elongation at break. When employed as a sensor, PUSS maintained a consistent resistance change rate even after being subjected to 50% strain following cutting and self-healing.
The main objective of this research is to study the mediating effect of Smart Community during public administration. As an effective tool for economic reform, there is a need to adopt good governance and Smart Community practices to enhance the public administration towards the governance. Based on an extensive literature review and conceptual background, the theoretical research framework was developed. The results confirmed the causal relationship between Smart Community and public administration. The results also reveal that Smart Community plays a mediating role in the public administration.
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