[1]卢静,孙龙飞,赵寒飞,等.石蜡/TOCNF相变气凝胶的制备及结构性能调控[J].浙江理工大学学报,2024,51-52(自科六):777-786.
LU Jing,SUN Longfei,ZHAO Hanfei,et al.Preparation and structure performance regulation of paraffins/TOCNF phase change aerogels[J].Journal of Zhejiang Sci-Tech University,2024,51-52(自科六):777-786.
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石蜡/TOCNF相变气凝胶的制备及结构性能调控()
LU Jing,SUN Longfei,ZHAO Hanfei,et al.Preparation and structure performance regulation of paraffins/TOCNF phase change aerogels[J].Journal of Zhejiang Sci-Tech University,2024,51-52(自科六):777-786.
浙江理工大学学报[ISSN:1673-3851/CN:33-1338/TS]
- 卷:
- 第51-52卷
- 期数:
- 2024年自科第六期
- 页码:
- 777-786
- 栏目:
- 出版日期:
- 2024-11-20
文章信息/Info
- Title:
- Preparation and structure performance regulation of paraffins/TOCNF phase change aerogels
- 关键词:
- 纤维素纳米纤维; Pickering乳液; 乳液稳定性; 相变材料; 气凝胶
- 分类号:
- TB332
- 文献标志码:
- A
- 摘要:
- 为了防止固液相变材料在相变过程中的液体泄漏，提高相变材料的稳定性，减少团聚，增加传热表面积，以TEMPO氧化纤维素纳米纤维（TEMPO oxidized cellulose nanofibers，TOCNF）作为稳定剂，以石蜡作为油相，经过高速分散得到石蜡/TOCNF Pickering乳液（paraffins/TOCNF Pickering emulsion，PTPE），并将其与作为气凝胶主体的TOCNF混合，通过冷冻干燥制备石蜡/TOCNF相变气凝胶（paraffins/TOCNF phase change aerogels, PTA )；分析TOCNF质量分数、溶液pH值对Pickering乳液尺寸形貌及稳定性的影响，探讨不同Pickering乳液添加量下所得PTA的形貌结构、储热容量、热稳定性和力学性能等。结果表明：当稳定剂TOCNF质量分数为0.5%、pH值为7~11时，所得Pickering乳液粒径较小且尺寸均一，平均粒径分布在8.3 ~14.8 μm，具有优异的稳定性；经乳化分散后，石蜡颗粒均匀镶嵌在PTA孔壁表面，无液体泄漏。所得PTA潜热值可高达225.8 J/g，并具有良好的机械性能。该文以TOCNF作为乳化剂和气凝胶的骨架，通过Pickering乳液模板法制备的具有三维多孔网络结构的相变气凝胶，一定程度上解决了目前纤维素复合相变气凝胶存在的液体泄漏、潜热低与机械强度差等难题。
参考文献/References:
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备注/Memo
- 备注/Memo:
-
收稿日期： 2024-03-27
网络出版日期2024-09-13
基金项目： 国家自然科学基金项目(22375181)；浙江省重点研发计划项目（2022C03093）
作者简介： 卢静(2000—)，女，湖南涟源人，硕士研究生，主要从事纤维素的功能化应用方面的研究
通信作者： 刘琳，E-mail：linliu@zstu.edu.cn
