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33 results on '"Sun, Enhui"'

11. Highly charged hydrogel with enhanced donnan exclusion toward ammonium for efficient solar-driven water remediation

Author

Xiao, Qingbo, primary, Zhu, Yan, additional, Xi, Yonglan, additional, Kong, Xiangping, additional, Ye, Xiaomei, additional, Zhang, Zhiyang, additional, Qiu, Cunpu, additional, Xu, Wenlong, additional, Cheng, Shuang, additional, Zhang, Jing, additional, Jia, Mingli, additional, Sun, Enhui, additional, Lin, Hongzhen, additional, and Wang, Jian, additional

Published
2022
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15. Biodegradable copolymer-based composites made from straw fiber for biocomposite flowerpots application

Author

Guofeng Wu, Sun Enhui, Hongying Huang, Qian Zhang, Guangfu Liao, and Qu Ping

Subjects
education.field_of_study, Materials science, Mechanical Engineering, Population, 02 engineering and technology, Straw, Biodegradation, 010402 general chemistry, 021001 nanoscience & nanotechnology, 01 natural sciences, Industrial and Manufacturing Engineering, 0104 chemical sciences, Hydrolysis, Mechanics of Materials, Ceramics and Composites, Copolymer, Fiber, Adhesive, Composite material, Biocomposite, 0210 nano-technology, education
Abstract

Biodegradable copolymer-based composites produced from straw fiber (SF) with hydrolyzed soybean protein isolate/urea/formaldehyde (HSPI/U/F) copolymer-based adhesive for biocomposite flowerpots (BFP) application was presented in this work, and molecular structure, morphology, biodegradability and microbial population of the resulting materials were also investigated. FTIR and SEM results indicated that the copolymer resin have been successfully prepared. The prepared BFP showed good biodegradation, and the introduction of HSPI increased the degradation rate of BFP, which was nearly 50% at 24 months. After 30 days of controlled composting, the CO2 release accumulation of BFP could reach 24 g. During the process of BFP degradation, the number of bacteria and fungi on the surface was higher than that of actinomyces, indicating the bacteria and fungi selectively accumulated on the BFP composites surface to accelerate its degradation. At the same time, nitrate ion could also be formed by nitrobacteria, which promoted plant growth. There is no doubt that the obtained biodegradable copolymer possessed great potential for BFP application.

Published
2019
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17. The characteristic changes of rice straw fibers in anaerobic digestion and its effect on rice straw-reinforced composites

Author

Guofeng Wu, Xiaochen Jin, Tengfei Xia, Sun Enhui, Wanying Tang, and Hongying Huang

Subjects
animal structures, Anaerobic respiration, Chemistry, 020209 energy, food and beverages, 02 engineering and technology, 010501 environmental sciences, Polyethylene, 01 natural sciences, chemistry.chemical_compound, Low-density polyethylene, Anaerobic digestion, Biogas, 0202 electrical engineering, electronic engineering, information engineering, Lignin, Hemicellulose, Cellulose, Composite material, Agronomy and Crop Science, 0105 earth and related environmental sciences
Abstract

Rice straw (RS) was utilized to produce biogas, and its biogas residues (BR) were studied on different degradation time. When rice straw was digested, much biogas was produced with average 50% methane. In anaerobic condition, non-fiber contents were mainly digested in the initial 10 days. Meanwhile, the surface of rice straw fibers became rough and its onset decomposition temperature also rose from 170 °C to 210 °C. Cellulose and hemicellulose were digested from 10 days to 30 days, and it determined that the cellulose crystallinity declined from 44.9% to 40.1% and hydroxyl groups was also seen to decrease, which conduces to the reduction of polarity and hydroscopicity. However, lignin was hardly digested in the whole anaerobic process. Inevitably, lignin was accumulated to contribute to the thermal stability and mechanical properties of rice straw fibers. Furthermore, rice straw/low-density polyethylene (RS/LDPE) and biogas residues/low-density polyethylene (BR/LDPE) composites were prepared. Compared with RS/LDPE composites, BR/LDPE composites showed obviously better tensile and flexural properties. Consequently, biogas residues of rice straw have better chemical and physical properties than the undigested rice straw.

Published
2018
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21. Biological fermentation pretreatment accelerated the depolymerization of straw fiber and its mechanical properties as raw material for mulch film

Author

Qu Ping, Huang Hongying, Xu Yueding, Yong Cheng, Sun Enhui, and Zhang Yue

Subjects
Renewable Energy, Sustainability and the Environment, Chemistry, 020209 energy, Strategy and Management, 05 social sciences, food and beverages, Environmental pollution, 02 engineering and technology, Straw, Raw material, Industrial and Manufacturing Engineering, Crystallinity, chemistry.chemical_compound, Ultimate tensile strength, 050501 criminology, 0202 electrical engineering, electronic engineering, information engineering, Fermentation, Hemicellulose, Fiber, Food science, 0505 law, General Environmental Science
Abstract

In order to reduce the negative ecological effects and environmental pollution caused by large-scale herbicide application in rice cultivation, a straw fiber mulch film (FMF) was developed. This study applied high-temperature enzymatic solution technology as a pretreatment process for rice straw (RS) fibers, causing beneficial physicochemical structural changes. Chemical composition, crystallinity index (CrI), degree of polymerization (DP), thermal stability, and other parameters of deconstructed RS fibers were analyzed. The change in CrI showed that appropriate pretreatment times can improve crystallinity, while excessively long pretreatment times caused crystallinity to sharply decrease from 44.65 wt% to 41.34 wt%. The C O bonds between lignin and hemicellulose were almost completely destroyed, confirming the deconstruction of linkages within RS fibers, making the material significantly softer and looser. Compared with untreated straw fibers, the mechanical pulping beating time decreased significantly, reducing energy consumption by 43.75%. The FMFs prepared with appropriate fermenting times exhibited improved mechanical properties. The tensile strength of FMF prepared using biological pretreatment fermentation (BPF) as a raw material increased from 11.26 N m g−1 to 15.68 N m g−1, exhibiting an increase of 39.25% compared to traditional fermentation (TF). This work provides a novel method, which has the potential to effectively control herbicides and support the development of sustainable agricultural systems.

Published
2021
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23. Perspective of S−CO2 power cycles

Author

Xu, Jinliang, primary, Liu, Chao, additional, Sun, Enhui, additional, Xie, Jian, additional, Li, Mingjia, additional, Yang, Yongping, additional, and Liu, Jizhen, additional

Published
2019
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