化工学报 ›› 2024, Vol. 75 ›› Issue (9): 3348-3359.DOI: 10.11949/0438-1157.20240329
收稿日期:
2024-03-21
修回日期:
2024-04-20
出版日期:
2024-09-25
发布日期:
2024-10-10
通讯作者:
孟晓荣
作者简介:
张丽萍(2000—),女,硕士研究生,zhangliping0108@163.com
基金资助:
Liping ZHANG1(), Xiaorong MENG1,2(), Jinfeng SONG3, Jinjing DU4
Received:
2024-03-21
Revised:
2024-04-20
Online:
2024-09-25
Published:
2024-10-10
Contact:
Xiaorong MENG
摘要:
低成本和规模化的薄膜化生产技术是热致相变性二氧化钒VO2(M)普及应用于节能窗领域的关键。采用硅烷偶联剂γ-氨丙基三乙氧基硅烷/γ-甲基丙烯酰氧基丙基三甲氧基硅烷KH550/KH570对固相法合成的VO2(M)粉体进行表面改性,再经微乳液聚合得到聚苯乙烯(PS)修饰的VO2@KH550/570@PS微球(VSPS),以聚乙烯醇缩丁醛(PVB)、聚氯乙烯(PVC)、聚偏二氟乙烯(PVDF)为聚合物共混基材,系统研究表面修饰对VO2(M)基聚合物复合薄膜的性质及光学、隔热性能的影响规律。结果表明:偶联剂预修饰有利于提升乳液聚合过程中PS与VO2结合,交联剂亚甲基双丙烯酰胺(MBA)的引入增强了VSPS的化学稳定性。相比VO2,VSPS在聚合物溶液体系中的分散能力增加,得到更加均匀的聚合物复合薄膜。其中VS570PS/PVB的可见光透光率Tlum高达86.64%,太阳能调制效率ΔTsol较VO2/PVB提升了12倍,与空白玻璃温差达16℃。这种兼具高透光性和隔热性能的VSPS聚合物复合膜制备技术为VO2(M)的智能窗材料应用提供了有益的思路。
中图分类号:
张丽萍, 孟晓荣, 宋锦峰, 杜金晶. VO2@KH550/570@PS复合薄膜的制备及其热致相变性能[J]. 化工学报, 2024, 75(9): 3348-3359.
Liping ZHANG, Xiaorong MENG, Jinfeng SONG, Jinjing DU. Preparation of VO2@KH550/570@PS composite film and its thermally induced phase change properties[J]. CIESC Journal, 2024, 75(9): 3348-3359.
图5 VSPS粉体的SEM图:(a) VO2, (b) VS550PS, (c) VS570PS, (g) VS550, (h) VS570, (i) VO2@PS;水接触角:(d) VO2, (e)VS550PS,(f) VS570PS, (j) VS550, (k) VS570, (l) VO2@PS
Fig.5 SEM images of VSPS powder: (a) VO2, (b) VS550PS, (c) VS570PS, (g) VS550, (h) VS570, (i) VO2@PS; water contact angle of modified powder: (d) VO2, (e)VS550PS, (f) VS570PS, (j) VS550, (k) VS570, (l) VO2@PS
图6 粉体耐酸性测试图[从左到右依次为VO2 (M)、VS550、VS570、VS550PS、VS570PS]
Fig.6 Acid resistance test diagram of powder [from left to right: VO2 (M), VS550, VS570, VS550PS, VS570PS]
图7 粉体耐氧化性测试图[从左到右依次为VO2 (M)、VS550、VS570、VS550PS、VS570PS]
Fig.7 Powder oxidation resistance test diagram [from left to right: VO2 (M), VS550, VS570, VS550PS, VS570PS]
图9 复合薄膜的SEM图[(a)~(c)]、对应的局部放大SEM图[(d)~(f)]和水接触角[(g)~(i)]
Fig.9 SEM images of composite film [(a)—(c)], corresponding local enlarged SEM images [(d)—(f)], water contact angle [(g)—(i)] of composite film
图10 复合薄膜热致变色性能:(a)、(b) 不同VSPS复合薄膜;(c) 不同VS570PS用量下复合薄膜的光透过率和全红外阻隔率;(d) 不同VSPS用量下复合薄膜的紫外-可见-近红外透射谱图
Fig. 10 Thermochromic properties of composite films: (a),(b) different VSPS composite films; (c) VL transmittance full IR rejection of composite film under different VS570PS dosage; (d) transmittance spectra of composite films with different amounts of VSPS
Sample | Tlum/% | A-Tlum/% | Tsol/% | ΔTsol/% | ||
---|---|---|---|---|---|---|
20℃ | 90℃ | 20℃ | 90℃ | |||
VO2/PVB | 57.60 | 59.65 | 58.63 | 57.28 | 56.94 | 0.34 |
VS550PS/PVB | 81.35 | 83.03 | 82.19 | 80.73 | 78.84 | 1.89 |
VS570PS/PVB | 84.87 | 88.42 | 86.64 | 84.80 | 80.46 | 4.34 |
VS570PS/PVDF | 68.07 | 70.66 | 69.36 | 70.58 | 69.15 | 1.43 |
VS570PS/PVC | 85.84 | 84.97 | 85.41 | 86.00 | 83.79 | 2.21 |
表1 VO2/PVB和VSPS聚合物复合薄膜的Tlum和ΔTsol值(A为高低温可见光透过率平均值)
Table 1 Tlum and Tsol of VO2/PVB and VSPS polymer composite films, (where A is average transmittance of high and low temperature visible light)
Sample | Tlum/% | A-Tlum/% | Tsol/% | ΔTsol/% | ||
---|---|---|---|---|---|---|
20℃ | 90℃ | 20℃ | 90℃ | |||
VO2/PVB | 57.60 | 59.65 | 58.63 | 57.28 | 56.94 | 0.34 |
VS550PS/PVB | 81.35 | 83.03 | 82.19 | 80.73 | 78.84 | 1.89 |
VS570PS/PVB | 84.87 | 88.42 | 86.64 | 84.80 | 80.46 | 4.34 |
VS570PS/PVDF | 68.07 | 70.66 | 69.36 | 70.58 | 69.15 | 1.43 |
VS570PS/PVC | 85.84 | 84.97 | 85.41 | 86.00 | 83.79 | 2.21 |
Sample | K1 (0—180 s) | K2 (210—380 s) | K3 (410—600 s) |
---|---|---|---|
blank glass | 0.607 | 0.159 | 0.0760 |
VO2/PVB | 0.552 | 0.153 | 0.0710 |
VS550PS/PVB | 0.357 | 0.139 | 0.0610 |
VS570PS/PVB | 0.335 | 0.149 | 0.0630 |
VS570PS/PVC | 0.428 | 0.147 | 0.0670 |
VS570PS/PVDF | 0.450 | 0.096 | 0.0610 |
表2 VSPS复合薄膜升温速率K
Table 2 Heating rate K of VSPS composite film
Sample | K1 (0—180 s) | K2 (210—380 s) | K3 (410—600 s) |
---|---|---|---|
blank glass | 0.607 | 0.159 | 0.0760 |
VO2/PVB | 0.552 | 0.153 | 0.0710 |
VS550PS/PVB | 0.357 | 0.139 | 0.0610 |
VS570PS/PVB | 0.335 | 0.149 | 0.0630 |
VS570PS/PVC | 0.428 | 0.147 | 0.0670 |
VS570PS/PVDF | 0.450 | 0.096 | 0.0610 |
图12 不同膜厚的VSPS复合薄膜的光透过率(a)和全红外阻隔率(b)
Fig.12 Light transmittance (a) and total infrared blocking rate (b) of VSPS composite films with different film thicknesses
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