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Electrospinning preparation and near-infrared absorption properties of a silica/cesium tungsten bronze micro–nano fiber membrane
RSC Advances ( IF 3.9 ) Pub Date : 2021-09-20 , DOI: 10.1039/d1ra06157g Yilong Song 1 , Fang Zhao 1 , Zhizun Li 1 , Zhaogang Cheng 1 , Hongjing Wan 2
RSC Advances ( IF 3.9 ) Pub Date : 2021-09-20 , DOI: 10.1039/d1ra06157g Yilong Song 1 , Fang Zhao 1 , Zhizun Li 1 , Zhaogang Cheng 1 , Hongjing Wan 2
Affiliation
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Silica/cesium tungsten bronze (SiO2/CsxWO3) composite micro–nano fiber membranes were prepared by the co-precursor electrostatic spinning method using cesium chloride, tungsten powder and tetraethyl orthosilicate as raw materials. TGA, XRD, FT-IR, XPS, SEM and ultraviolet-visible-near red spectrophotometry were used to analyze the thermal decomposition process, phase composition, microscopic morphology and near-infrared absorption properties of the product. Studies have shown that as the ratio of Cs/W of raw materials increases, the crystallinity of CsxWO3 in the product increases first and then decreases. When n(Cs)/n(W) reaches 0.5, its crystallinity is the most complete; similarly, calcination also contributes to the crystallization of Cs0.33WO3, but high temperatures above 800 °C will also destroy its crystal structure. The study found that after calcination at 700 °C, the fiber membrane with a Cs/W atomic ratio of 0.5 has the best infrared absorption performance. The average absorbance of near-infrared light at 780–2500 nm is 1.5, which is 5.56 times that of the pure SiO2 fiber membrane. The tensile strength reaches 2.4 MPa, which can meet practical requirements. This research provides a basis for the development of flexible solar shading materials under complex outdoor conditions.
中文翻译：
二氧化硅/铯钨青铜微纳米纤维膜的静电纺丝制备及其近红外吸收性能
以氯化铯、钨粉和原硅酸四乙酯为原料，采用共前驱体静电纺丝法制备了二氧化硅/铯钨青铜（SiO 2 /Cs x WO 3 ）复合微纳米纤维膜。采用TGA、XRD、FT-IR、XPS、SEM和紫外-可见-近红分光光度法对产物的热分解过程、物相组成、微观形貌和近红外吸收性能进行了分析。研究表明，随着原料Cs/W比例的增大，产品中Cs x WO 3的结晶度先增大后减小。当n (Cs)/ n (W)达到0.5时，其结晶度最完全；同样，煅烧也有助于Cs 0.33 WO 3的结晶，但800℃以上的高温也会破坏其晶体结构。研究发现，经700℃煅烧后，Cs/W原子比为0.5的纤维膜具有最佳的红外吸收性能。近红外光在780~2500 nm处的平均吸光度为1.5，是纯SiO 2纤维膜的5.56倍。抗拉强度达到2.4MPa，可以满足实际使用要求。该研究为复杂室外条件下柔性遮阳材料的开发提供了基础。
更新日期：2021-09-20
中文翻译：
二氧化硅/铯钨青铜微纳米纤维膜的静电纺丝制备及其近红外吸收性能
以氯化铯、钨粉和原硅酸四乙酯为原料，采用共前驱体静电纺丝法制备了二氧化硅/铯钨青铜（SiO 2 /Cs x WO 3 ）复合微纳米纤维膜。采用TGA、XRD、FT-IR、XPS、SEM和紫外-可见-近红分光光度法对产物的热分解过程、物相组成、微观形貌和近红外吸收性能进行了分析。研究表明，随着原料Cs/W比例的增大，产品中Cs x WO 3的结晶度先增大后减小。当n (Cs)/ n (W)达到0.5时，其结晶度最完全；同样，煅烧也有助于Cs 0.33 WO 3的结晶，但800℃以上的高温也会破坏其晶体结构。研究发现，经700℃煅烧后，Cs/W原子比为0.5的纤维膜具有最佳的红外吸收性能。近红外光在780~2500 nm处的平均吸光度为1.5，是纯SiO 2纤维膜的5.56倍。抗拉强度达到2.4MPa，可以满足实际使用要求。该研究为复杂室外条件下柔性遮阳材料的开发提供了基础。
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