磷钼酸/聚苯乙烯/聚乙烯醇电纺纤维膜的制备及性能

doi:10.7503/cjcu20130913

高等学校化学学报 ›› 2014, Vol. 35 ›› Issue (2): 389.doi: 10.7503/cjcu20130913

磷钼酸/聚苯乙烯/聚乙烯醇电纺纤维膜的制备及性能

李婷婷¹, 刘策², 张志明¹(), 安立宝³, 杨翠环¹

1. 河北联合大学材料科学与工程学院, 河北省无机非金属材料重点实验室, 唐山 063009
2. 化学工程学院, 唐山 063009
3. 机械工程学院, 唐山 063009

收稿日期:2013-09-16 出版日期:2014-02-10 发布日期:2014-01-03
作者简介:联系人简介: 张志明, 男, 博士, 副教授, 主要从事聚合物基纳米复合材料研究. E-mail:zhangzhiming1942@163.com
基金资助:
国家自然科学基金(批准号: 51172062)、河北省科技支撑计划项目(批准号: 12213802)、唐山市科技计划项目(批准号: 12140201A-9)和河北省引进海外高层次人才“百人计划”项目(批准号: 2012000005)资助

Preparation and Performance of POMs/PS/PVA Electrospinning Fiber Membranes^†

LI Tingting¹, LIU Ce², ZHANG Zhiming^1,^*(), AN Libao³, YANG Cuihuan¹

1. Hebei Provincial Key Laboratory of Inorganic Nonmetallic Materials, College of Material Science and Engineering
2. College of Chemical Engineering
3. College of Machnical Engineering, Hebei United University, Tangshan 063009, China

Received:2013-09-16 Online:2014-02-10 Published:2014-01-03
Contact: ZHANG Zhiming E-mail:zhangzhiming1942@163.com
Supported by:
† Supported by the National Natural Science Foundation of China(No.51172062), Science and Technology Support Program of Hebei Province, China(No.12213802), Tangshan Science and Technology Project, China(No.12140201A-9) and the Hundred Talents Program of Hebei Province, China(No.E20121000005)

摘要/Abstract

摘要：

采用静电纺丝法制备了磷钼酸/聚苯乙烯(PS)/聚乙烯醇(PVA)复合纤维, 并将其模压成膜. 利用红外光谱(IR)、扫描电子显微镜(SEM)及X射线能谱(EDX)等对复合纤维及其膜的结构与形貌进行表征, 并对复合纤维膜的光催化性能、力学性能及在水中稳定性进行测试. 结果表明, 在复合纤维中磷钼酸的Keggin结构得到保持. PS与PVA质量比为1∶1时, 复合纤维形貌最佳, 表面光滑, 直径较小且分布均匀, 复合纤维的直径随着磷钼酸含量的增加而减小. 将磷钼酸固载于复合纤维膜上比直接使用具有更高的光催化活性, 光照25 min后接近98%的甲基橙降解; 复合纤维膜易于回收再利用, 5次重复使用后, 复合纤维膜没有破损, 磷钼酸损失较少, 光催化性能无明显下降. 复合纤维膜的强度随磷钼酸含量的增加先增大后减小, 韧性随PVA含量的增加而增大, 随磷钼酸含量的增加而减小.

关键词: 磷钼酸, 聚苯乙烯, 聚乙烯醇, 静电纺丝, 复合纤维膜

Abstract:

POMs(phosphomolybdic acid)/PS(polystyrene)/PVA(polyvinyl alcohol) composite fibers were prepared by electrospinning, which were molded into a membrane. The structure and morphology of the composite fibers were characterized, by infrared(IR) spectroscopy, scanning electron microscopy(SEM) and energy dispersive X-ray(EDX) spectroscopy. The photocatalytic performance and mechanical properties of the composite fibers membranes were also tested. The results show that the Keggin structure of POMs in the composite fiber was not destroyed. When the mass ratio of PS and PVA was 1∶1, the composite fibers got the best morphology, smooth surface and smaller diameter along with uniform distribution. The diameter of composite fibers decreased with the increase of POMs content. UV test showed that the POMs immobilized on composite fiber membranes displayed higher photocatalytic activity than that of the direct use. Around 98% of methyl orange was degraded after 25 min irradiation. The composite fiber membrane was easy to recycle and reuse. After using 5 times repeatedly, the photocatalytic activity of the composite fiber membranes was not significantly reduced. The composite fiber membranes were very few breakages. The composite fiber membranes strength increased first and then decreased with the POMs content increased. The toughness increased with the increase of PVA content but the toughness decreased with the increasing of the POMs content.

Key words: Phosphomolybdic acid, Polystyrene, Polyvinyl alcohol, Electrospinning, Composite fiber membrane

中图分类号:

O631

TrendMD:

李婷婷, 刘策, 张志明, 安立宝, 杨翠环. 磷钼酸/聚苯乙烯/聚乙烯醇电纺纤维膜的制备及性能. 高等学校化学学报, 2014, 35(2): 389.

LI Tingting, LIU Ce, ZHANG Zhiming, AN Libao, YANG Cuihuan. Preparation and Performance of POMs/PS/PVA Electrospinning Fiber Membranes^†. Chem. J. Chinese Universities, 2014, 35(2): 389.

图/表 11

Fig.1 Infrared spectra of POMs(A) and POMs/PS/PVA composite fibers(B)

Fig.2 EDX spectrum of POMs/PS/PVA composite fibers membrane

Fig.3 SEM images of composite fibers with the different mass ratios of PS and PVA Mass ratio of PS and PVA : (A) 1∶2; (B) 1∶1; (C) 3∶2; (D) 2∶1.

Fig.4 SEM images of the composite fibers with different contents of POMs in the spinning solutionContent of POMs/(mg·mL-1): (A) 5; (B) 10; (C) 15; (D) 20.

Fig.5 UV-Vis spectra of reaction of methyl orange catalysed by the POMs/PS/PVA composite fiber membranes at different timeTime of reaction/min: a. 5; b. 10; c. 15; d. 20; e. 25.

Fig.6 Concentration change of methyl orange vs. irradiation time for POMs(a) and POMs/PS/PVA composite fiber membranes(b)

Fig.7 Recycle use of the composite fiber membranes for different cycle times at an interval of 25 minCycle times: a. 1; b. 2; c. 3; d. 4; e. 5.

Table 1 Mass loss of POMs measured at an interval of 25 min(total 5 intervals) after the composite fiber membrane immersed in water*

No.	pH	Mass of POMs in the water/mg	Mass loss of POMs(%)
1	7.18	0	0
2	7.19	0	0
3	7.18	0	0
4	5.35	0.27	0.14
5	5.09	0.49	0.25

Table 2 Tensile strength and elongation of the composite fiber membrane with different mass ratio of PS and PVA

Mass ratio of PS/PVA	Cold pressing(room temperature)		Hot pressing(50 ℃)
Mass ratio of PS/PVA	Tensile strength / MPa	Tensile fracture strain(%)	Tensile strength/MPa	Tensile fracture strain(%)
1∶2	0.43	58.15	8.16	220.77
1∶1	0.44	45.14	9.56	123.56
3∶2	0.47	30.63	10.34	113.46
2∶1	0.68	15.22	11.68	68.85

Table 3 Tensile strength and elongation of composite fiber membranes with different contents of POMs

Mass fraction of POMs(%)	Cold pressing(room temperature)		Hot pressing(50 ℃)
Mass fraction of POMs(%)	Tensile strength/MPa	Tensile fracture strain(%)	Tensile strength/MPa	Tensile fracture strain(%)
4.76	0.42	72.80	9.99	188.88
9.09	0.68	68.15	15.22	183.73
13.04	0.60	65.65	13.43	165.66
16.67	0.44	40.48	10.74	134.03

Fig.8 SEM images of the composite fibers membrane after cold pressing(A) and hot pressing(B)

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磷钼酸/聚苯乙烯/聚乙烯醇电纺纤维膜的制备及性能

Preparation and Performance of POMs/PS/PVA Electrospinning Fiber Membranes^†

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磷钼酸/聚苯乙烯/聚乙烯醇电纺纤维膜的制备及性能

Preparation and Performance of POMs/PS/PVA Electrospinning Fiber Membranes†

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Preparation and Performance of POMs/PS/PVA Electrospinning Fiber Membranes^†