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Career-related parental support plays an important role in career adaptability. However, the condition and mechanism of parental career-related support on four dimensions of career adaptability are little known. Guided by the social cognitive career theory, positive psychological capital theory, and career construction theory, the current study investigates resilience and hope as two potential mediators between career-related parental support and different aspects of career adaptability. A sample of 636 vocational high school students responded to this study. The results indicated that: (a) students who often discussed future career plans with their parents had a higher level of career concern, career control, career curiosity, and career confidence than those who occasionally or never discussed future career plans; (b) career-related parental support positively related to the four dimensions of career adaptability; (c) parental career-related support was associated with more resilience, which related to a higher level of hope; ultimately, more hope related to higher career adaptabilities (i.e., career concern, career control, career curiosity, and career confidence); (d) parental career-related support related to different aspects of career adaptability through indirect pathways by more resilience or more hope. These findings advise educators to give various career-related support and pertinent career training to vocational high school students., Author(s): Qing Zeng [sup.1] , Jia Li [sup.1] , Sijuan Huang [sup.1] , Jinqing Wang [sup.1] , Feifei Huang [sup.1] , Derong Kang [sup.1] , Minqiang Zhang [sup.1] [sup.2] [sup.3] [...]

In this article, a hybrid of reduced graphene oxide (rGO) sheets decorated by zinc oxide (ZnO) particles was synthesized by a simple hydrothermal method, and its thermosetting polyimide (TPI) composites were prepared by an in situ polymerization method. The mechanical and tribological properties of the ZnO-rGO/TPI composite under dry sliding conditions were studied. The compression strength and modulus of 0.8 wt% ZnO-rGO/TPI composite reached 120.67 [+ or -] 2 MPa and 1.77 [+ or -] 0.06 GPa, which were 28.1% and 51.3% higher than those of TPI, respectively. The wear rate of 0.8 wt% ZnO-rGO/TPI was also reduced to 1.54 * [10.sup.-8] [mm.sup.3] [N.sup.-1] [m.sup.-1] at 100 N load, which is about two order of magnitude lower than that of TPI. Compared with the addition of GO alone, the results also demonstrate more significant enhancements in mechanical and tribological properties of TPI by ZnO-rGO hybrid. Furthermore, the tribological mechanism exploration indicates that the 'particle-on-plane' structure and chemical bonding between ZnO and rGO lead to the crack suppression and strength increment, contributing to the extraordinary improvement of mechanical and tribological properties. Thus, this ZnO-rGO/TPI composite presents promising potential as high-performance tribological materials under dry-sliding conditions in industrial applications. KEYWORDS mechanical properties, synergistic effect, thermosetting polyimide, tribological properties, ZnO-rGO hybrid, 1 | INTRODUCTION Polymer and its inorganic composites have been applied in various areas due to their outstanding mechanical properties, thermal stability, chemical stability, and wear resistance. [1-4] Polyimide (PI), [...]

The development of environmentally friendly and cost-effective lubricating materials to reduce friction and wear at the macroscale is crucial for reducing fuel consumption and exhaust emissions, thereby enhancing sustainability. Deep eutectic solvents (DESs) have emerged as viable alternatives to traditional lubricants due to their ease of preparation, affordability, reproducibility, and superior tribological properties. Herein, a series of natural ternary DESs (TDESs) are successfully developed by blending eco-friendly and economical D -sorbitol and ethanolamine with quaternary ammonium salts through hydrogen bond interactions that may be regarded as a new and green liquid lubricating system. The synthesized TDESs exhibit exceptional thermal stability, rheological properties, corrosion resistance, and wettability towards metallic substrates. Moreover, the experimental results combined with molecular dynamics simulations indicate that the TDESs can form a robust protective lubricating film on steel surfaces through polar adsorption and tribochemical reactions. Consequently, the synthesized TDESs demonstrate a low friction coefficient (∼0.1) and ultra-low wear rate (as low as 7.8 × 10−10 mm3 N−1 m−1), exhibiting a near-zero wear behavior on steel surfaces under high load (100 N) and multi-environment scenarios. This research not only highlights the potential applications of DESs in tribology but also provides guidance for the future generation of green and high-performance liquid lubricating materials. [ABSTRACT FROM AUTHOR]

Axial piston pumps with compact structures and high efficiency are widely used in construction machinery. The efficiency and lifetime strongly depend on the tribological performance of the pump's valve plate pair. To enhance the tribological performance of the valve plate pair, surface textures, and H-DLC coatings were fabricated to modify the CuAl10Fe5Ni5 surfaces. The influences of elliptic textures of different sizes and textured H-DLC coatings on the surface friction and wear properties of the valve plate surface under oil lubrication were evaluated using a ring-on-disk tribometer. The results reveal that the friction and wear properties of the CuAl10Fe5Ni5 surfaces are significantly enhanced by elliptic textures, and the friction coefficient and wear rate of textured CuAl10Fe5Ni5 with E90 are maximally decreased by 95% and 87%, respectively. Compared with the surface textures and H-DLC coatings, the textured H-DLC coating has the greatest ability to reduce wear and adhesion. The wear rate of the textured H-DLC coating is further reduced by 98%. This improvement can be explained by the synergistic effect of the elliptic textures and H-DLC coatings, which are attributed to the reduced contact area, debris capture, and secondary lubrication of the elliptic textures, and increased surface hardness. [ABSTRACT FROM AUTHOR]