气体输送到纤维素材料中,用于具有高度多孔结构的纤维素材料
Sunghyun Byun1, Sang Wook Kang1
1Department of Chemistry and Energy Engineering, Sangmyung University, Seoul 03016, Republic of Korea.
Carbohydrate polymers
|September 22, 2023
概括
研究人员使用甘油酸创建了多孔纤维素酸盐 (CA) 膜,具有增强的多孔性. 这种方法可以产生具有较小孔径的膜,从而改善潜在应用的材料特性.
科学领域:
- 材料科学 材料科学 材料科学
- 聚合物化学 聚合物化学
- 膜技术 膜技术 膜技术
背景情况:
- 聚烯膜的热稳定性较低,限制了它们的应用.
- 开发具有改进性能的新型多孔材料对于先进的分离工艺至关重要.
研究的目的:
- 开发一种用于制造有控孔结构的多孔纤维素酸盐 (CA) 膜的方法.
- 研究添加剂和气体压力在CA膜内的孔形成中的作用.
主要方法:
- 使用纤维素酸盐 (CA) 作为基础材料.
- 加入糖醇酸作为添加剂,使CA膜变质.
- 施加气体压力以诱导塑化区域的孔隙形成.
- 使用孔径测量和扫描电子显微镜 (SEM) 进行了孔径大小,孔径和表面形态的特征.
- 使用红外 (IR) 光谱分析了CA和甘油酸之间的化学相互作用.
- 使用热重力测量分析 (TGA) 评估了热稳定性.
主要成果:
- 成功制备的CA/甘油酸膜,平均孔径为150nm,孔隙度为77%.
- SEM证实了膜表面和横截面上大量的细孔的存在.
- 红外分析表明,糖醇酸被去除,这表明它在毛孔形成过程中与CA相互作用.
- TGA结果显示,热稳定性下降,与多孔性增加相关.
结论:
- 开发的方法有效地创造了具有理想孔状特性的多孔CA膜.
- 甘油酸在气体压力下的CA膜中起到孔形成剂的作用.
- 由此产生的多孔CA膜为需要特定的多孔性和毛孔大小分布的应用提供了潜在的替代方案.
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