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387 results on '"Yuan, Wenjing"'

23. Exploration and Practice of Teaching Reform of Injection Molding Process and Mold Design (CAD/CAE) under the Ideological and Political Concept of the Course.

Author

YAN Gai, YUAN Wenjing, and QIN Mingying

Abstract

Under the ideological and political concept of the course, the teaching reform of the course on the "injection molding process and mold design (CAD/CAE)" is explored and practiced by exploiting the ideological and political elements in the basic theory of the injection molding process and mold design. Firstly, it analyzes the importance of ideological and political education; secondly, the goal of ideological and political education is established; finally, the ideological and political teaching and evaluation system of professional courses has been established by adhering to the principle of technological self-confidence as the starting point, innovative ability training as the goal, moral education as the fundamental task, and "publicizing the spirit of model workers, shaping the spirit of craftsmanship, and cultivating patriotism" as the guideline of ideological and political education. The teaching practice shows that the effect of the ideological and political reform of the curriculum is excellent, and the research provides a reference for the ideological and political reform of the curriculum in the new era. [ABSTRACT FROM AUTHOR]

Published
2024
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39. Covalent Triazine Framework Nanosheets: Synthesis and Energy Conversion and Storage†.

Author

Liu, Zhao, Wang, Congxu, Yuan, Wenjing, and Xu, Yuxi

Subjects
ENERGY conversion, NANOSTRUCTURED materials, TECHNOLOGICAL innovations, ELECTROCHEMICAL electrodes, ENERGY storage
Abstract

Comprehensive Summary: Covalent triazine framework nanosheets (CTF NSs), an emerging class of two‐dimensional nanomaterials, have received great attention due to their abundant active sites, permanent porosity, molecular structural diversity, superior chemical/thermal stability, and short charge diffusion path, enabling technological breakthroughs in a myriad of applications. The forefront developments and applications of CTF NSs as photocatalysts and electrochemical electrodes have conferred superior performance and made great impact in the field of energy and advanced catalysis. This forward‐looking review aims to summarize the research trends, synthesis, properties of CTF NSs and their CTF counterpart, and highlight their progress in applications with respect to energy storage and conversion devices. Finally, the current challenges and future perspectives for CTF NSs are also presented. [ABSTRACT FROM AUTHOR]

Published
2024
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46. Enhanced foamability of isotactic polypropylene/polypropylene-grafted-nanosilica nanocomposites in supercritical carbon dioxide

Author

Yuan, Wenjing, Wang, Feng, Gao, Chong, Liu, Peng, Ding, Yanfen, Zhang, Shimin, and Yang, Mingshu

Subjects
Polymers, Carbon dioxide, Engineering and manufacturing industries, Science and technology
Abstract

Polypropylene-grafted nanosilica (PP-g-Si[O.sub.2]) was prepared by us as a new modified nanosilica with long polymer chains and high grafting density. It was found that the addition of PP-g-Si[O.sub.2] resulted in remarkable strain-hardening behavior of PP. Herein, the foaming behavior of isotactic polypropylene (iPP)/ PP-g-Si[O.sub.2] nanocomposites was investigated by using supercritical carbon dioxide (scC[O.sub.2]) as a blowing agent. The results demonstrated that the incorporation of PP-g-Si[O.sub.2] could obviously enhance the foamability of iPP. In particular, the uniform cell distribution and smaller cell size could be obtained by 1 wt% particle loading, and 5 wt% particle content showed a wider foaming temperature range and higher cell density. The noticeable enhancement in the foamability of iPP was attributed to the reinforced melt strength, high melt elasticity and the increased heterogeneous nucleation caused by well dispersed and long polypropylene chains grafted Si[O.sub.2]. These findings provide new insights to improve the foaming ability of iPP with incorporation of modified nanoparticles. KEYWORDS foamability, nanosilica, polypropylene, rheology, 1 | INTRODUCTION Isotactic polypropylene (iPP) is one of the most extensively used commercial polymers owing to its outstanding overall performance, including superior mechanical and insulation properties, good chemical resistance, [...]

Published
2020
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