Processing and properties of a graphene-reinforced superhydrophobic siloxane
文献类型：期刊论文
| 作者 | He, Li1; Wang, Dongfang1; Ma, Tiantian1,2; Song, Jinliang1,3; Wu, Yongkang1,5; Li, Yucheng1,4; Deng, Yongfeng6; Zhang, Guoping1 |
| 刊名 | MATERIALS & DESIGN
 |
| 出版日期 | 2023-05-01 |
| 卷号 | 229期号:-页码:- |
| ISSN号 | 0264-1275 |
| 关键词 | Alkali activation Cavitation Graphene Siloxane Sol-gel Superhydrophobicity |
| 英文摘要 | Three-dimensional superhydrophobic materials are characterized by a low surface energy and extremely low strength, and hence require reinforcement for viable applications. An experimental study is presented of the processing and mechanical properties of a graphene-reinforced superhydrophobic siloxane, synthesized by a sol-gel approach integrating alkali activation of metakaolin, hydrolysis of alkoxysilane, dispersion of graphene into the precursor, and co-condensation. To promote uniform dispersion and distribution of graphene, three processing techniques were used: while ultrasonication was adopted to disperse graphene nanoplatelets, accelerated condensation at 50 and 75 & DEG;C and varying the precursor's viscosity used to prevent graphene from floating and re-aggregation. Results of nanoindentation, porosimetry, and unconfined compression show that adding 0.9 wt% graphene increases the strength of the superhydrophobic composites from ti 0 to 34 MPa. Slow condensation and curing at 25 & DEG;C allow graphene to re-aggregate and float upward in the sol, leading to its heterogeneous distribution. Despite its function in improving microscale dispersion, ultrasonication detrimentally decreases the composite's strength due to acoustic cavitation. Similarly, curing at elevated temperatures accelerates cocondensation and results in a more uniform distribution of graphene, but induces thermal cavitation and bubble formation, because the threshold for acoustic and thermal cavitations is significantly reduced by superhydrophobicity.& COPY; 2023 The Author(s). Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND |
| 学科主题 | Materials Science |
| 语种 | 英语 |
| 出版者 | ELSEVIER SCI LTD |
| WOS记录号 | WOS:001029610200001 |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/35543]  |
| 专题 | 中科院武汉岩土力学所 |
| 作者单位 | 1.Department of Civil and Environmental Engineering, University of Massachusetts Amherst, Amherst, MA 01003, USA 2.State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan, Hubei 430071, China 3.College of Transportation Engineering, Dalian Maritime University, Dalian, Liaoning 116026, China 4.Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education, Tongji University, Shanghai, 200092, China 5.School of Civil Engineering, Beijing Jiaotong University, Beijing, 100044, China 6.nstitute of Geotechnical Engineering, School of Transportation, Southeast University, Nanjing 211189, China |
| 推荐引用方式 GB/T 7714 | He, Li,Wang, Dongfang,Ma, Tiantian,et al. Processing and properties of a graphene-reinforced superhydrophobic siloxane[J]. MATERIALS & DESIGN,2023,229(-):-. |
| APA | He, Li.,Wang, Dongfang.,Ma, Tiantian.,Song, Jinliang.,Wu, Yongkang.,...&Zhang, Guoping.(2023).Processing and properties of a graphene-reinforced superhydrophobic siloxane.MATERIALS & DESIGN,229(-),-. |
| MLA | He, Li,et al."Processing and properties of a graphene-reinforced superhydrophobic siloxane".MATERIALS & DESIGN 229.-(2023):-. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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