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1,124 results on '"XU Xiaoxiao"'

198. Preparation of Cellulose Nanofibrils with the Pretreatments using Inexpensive Protic Ionic Liquids based on Dimeric Oxalic Acid Anions.

Author

Zhu, Deqin, Xu, Xiaoxiao, Liu, Jingjing, Lan, Wenbo, Wei, Ligang, Li, Kunlan, Liu, Na, An, Qingda, Shao, Guolin, and Zhai, Shangru

Subjects
*IONIC liquids, *OXALIC acid, *CELLULOSE, *ANIONS, *CRYSTAL structure, *HYDROGEN bonding
Abstract

Preparation of cellulose nanofibrils (CNFs) with the pretreatments using alkanolamine‐based protic ionic liquids (PILs) with dimeric oxalic acid anions ([(HOA)(H2OA)]−) was fully investigated. The cation type [ethanolamine ([MEA]+), diethanolamine ([DEA]+), triethanolamine ([TEA]+)], and water addition greatly influenced the CNF yields. Under the pretreatment conditions of 110 °C and 3 h, the CNF yields with different PIL‐based systems followed the order: [MEA][(HOA)(H2OA)]>[DEA][(HOA)(H2OA)]>[TEA][(HOA)(H2OA)], similar to their swelling capacities. The highest CNF yield of 85.0 % was obtained after the pretreatment with [MEA][(HOA)(H2OA)]‐water containing 30 wt % PILs. The optimal pH range of PILs‐water was 1.10–1.15. The good recyclability indicated that these inexpensive PILs can be employed as a simple and efficient pretreatment system for preparing CNFs. The physicochemical properties of the prepared CNFs were greatly changed by varying the PILs' pretreatment systems. The thermal stability of CNFs was intimately connected with the crystalline structures and hydrogen bonding modes. [ABSTRACT FROM AUTHOR]

Published
2023
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199. Factors affecting the blockchain application in construction management in China: an ANP-SWOT hybrid approach.

Author

Gao, Yu, Casasayas, Oskar, Wang, Jiayuan, and Xu, Xiaoxiao

Subjects
CONSTRUCTION management, ANALYTIC network process, BLOCKCHAINS
Abstract

As a decentralised ledger and data management technology, blockchain has attracted increasing interest and has been effectively applied in various areas. Despite its promising potential, there are few studies proposing effective strategies for promoting blockchain, particularly in providing a strategic analysis of blockchain in China's construction management. This study aims to investigate the external and internal environments of blockchain application and determine the roadmaps and strategies for blockchain application in construction management in China. A strength, weaknesses, opportunity, and threat (SWOT) analysis is employed to draw a panorama of the blockchain development status. Six roadmaps and strategies for blockchain application are proposed. By using the Analytic Network Process (ANP), a quantitative analysis was conducted to determine the ranking of SWOT sub-factors and roadmaps and strategies. The results show that 'traceability of information', 'high application threshold', 'national policy support', and 'low informatization level of the construction industry' are the most important sub-factors in strengths, weaknesses, opportunities, and threats respectively. The best roadmaps and strategies are 'improving the informatization level of the construction industry', followed by 'promoting the technological innovation of blockchain' and 'providing standard'. This study facilitates an in-depth understanding of the blockchain application in China's construction management. It will not only help researchers to conduct targeted blockchain research for more efficient project management, but also help practitioners to develop effective strategies for adopting blockchain. [ABSTRACT FROM AUTHOR]

Published
2023
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