4.1 Article

Construction of PDA@PAM-CMCNa-CaCl2 Vertical Porous Hydrogels for Solar-Powered Spontaneous Atmospheric Water Harvesting

期刊

POLYMER SCIENCE SERIES A
卷 -, 期 -, 页码 -

出版社

MAIK NAUKA/INTERPERIODICA/SPRINGER
DOI: 10.1134/S0965545X23701079

关键词

-

向作者/读者索取更多资源

This paper presents a method to prepare a polydopamine@sodium polyacrylamide carboxymethyl cellulose-calcium chloride composite aerogel for atmospheric water collection. The experimental results show that the aerogel exhibits excellent water vapor adsorption and desorption performance, making it suitable for water harvesting applications in arid regions.
Collecting water from the air could alleviate freshwater shortages in arid regions such as remote and inland areas. However, it is challenging to prepare adsorption materials that have high adsorption and desorption performance using straightforward synthesis routes for water harvesting applications. In this paper, a polydopamine (PDA)@Sodium polyacrylamide carboxymethyl cellulose (PAM-CMCNa)-calcium chloride (CaCl2) composite aerogel (PDCA) with a vertical channel was prepared by salt template method and photopolymerization for atmospheric water collection (AWH). The designed vertical channel promotes the rapid transport of water molecules from the atmosphere to the interior of the hydrogel through capillary action. During this process, the hydrogel further expands to prevent the leakage of the internal salt solution, which effectively improves the water vapor adsorption and desorption by hydrogel. Experimental results showed that the hydrogel can absorb 2.78 g/g of water at 90% relative humidity (RH), where 56.3% of the captured water can be desorbed within 60 min of exposure under 1.0 sun light intensity. After 10 adsorption-desorption cycles, the PDCA still possesses excellent water sorption performance. The indoor water collection test showed that the water collection performance reached 2.143 kg/kg day at 90% RH and 25 & DEG;C adsorption for 12 h and desorption for 6 h. The proposed method for the preparation of PDCA composites can achieve high water harvesting performance over a wide humidity range to enable solar-driven clean water production in remote areas.

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.1
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

暂无数据
暂无数据