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膜技术在气体分离中的研究和应用(连载):1.气体分离膜和膜材料 总被引:3,自引:0,他引:3
综合评述了膜技术在气体分离中的研究应用和国际发展动向。重点在于膜和膜材料,主要分离体系的应用情况及其经济性。本文包括膜原理简介,气体分离膜材料及其研究现状。 相似文献
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综合与评述了膜技术在气体分离中的研究应用和国际发展动向。重点在于膜和膜材料,主要分离体系的应用情况及其经济性。本文介绍气体分离膜的主要应用和过程经济性。 相似文献
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玻璃分离膜的制备,性能与应用 总被引:2,自引:1,他引:1
本文综述了近年来玻璃分离膜的制备工艺,性能及应用研究方面的进展,介绍了玻璃分离膜的主要制备方法,影响玻璃膜性能的因素,并对玻璃分离膜的应用及发展前景进行了讨论。append 相似文献
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本文从载体选择、膜的制备方法及表征、分子筛膜在气液分离、反应过程等方面总结了分子筛膜领域研究现状及进展情况,重点介绍了金硅沸石、ZSM-5沸石膜的制备、表征方法,并提出了一些关于开展分子筛膜制备及工业性应用研究方面的看法。 相似文献
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3种壳聚糖膜的制备及性能比较 总被引:1,自引:1,他引:0
以壳聚糖为原料,采用流延法制备了壳聚糖膜、N-乙酰化壳聚糖膜。采用FTIR、XRD和SEN对3种膜的结构和形貌进行了表征,并比较了3种膜的性能。结果表明,N-乙酰化壳聚糖膜的力学性能和耐酸性能好于其它两种膜。 相似文献
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制备了一种新型阴离子交换膜——壳聚糖/壳聚糖季铵盐交联共混膜,并用FTIR对共混膜进行了初步表征;分析研究了不同交联度及配比对离子交换膜相关性能的影响;并运用测试膜电位的方法估算了离子的迁移数和选择透过度。研究表明,膜呈现较好的电化学性能,而膜的力学性能较差、含水量高、选择透过度稍低。HACC含量为25%,交联度为0.2%的共混膜干强与湿强分别为53.10 MPa和8.40 MPa,含水量66.4%,IEC为1.97 mmol/g,面电阻2.67Ω.cm2,离子迁移数为0.91,选择透过度为81.6%。 相似文献
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Sodium zeolite‐Y (NaY zeolite) filled chitosan polymeric membranes were developed and characterized. The impact of adding different concentrations of NaY zeolite into the homogeneous chitosan membrane was investigated. The surface morphology, mechanical–physical properties, sorption, and pervaporation performance for the dehydration of isopropanol–water mixture separation by the pervaporation process were studied and evaluated. A homogeneous chitosan membrane showed preferential water sorption and permeation compared to isopropanol. The optimum concentration of NaY zeolite added to the homogeneous chitosan membrane was 0.4 wt %, which showed that the dispersion of the NaY zeolite was the most homogeneous and finely covered by the chitosan polymer in the zeolite–chitosan polymer interface. The tensile strength and percent strain at maximum of this membrane were 59.347 MPa and 27.5%, respectively. The sorption experiments showed that the degree of swelling was 6.54% with 1.01 wt % isopropanol sorbed in these membranes. The pervaporation separation tests demonstrated that the NaY zeolite filled chitosan membrane was capable for isopropanol–water mixture separation and improved the pervaporation separation index from 272 (homogeneous chitosan membrane) to 2687. © 2005 Wiley Periodicals, Inc. J Appl Polym Sci 99: 1740–1751, 2006 相似文献
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丝素/羧甲基壳聚糖共混膜的结构性能探讨 总被引:1,自引:0,他引:1
将含有甘油和戊二醛的丝素与羧甲基壳聚糖按一定比例混合,制得丝素/羧甲基壳聚糖共混膜,对共混膜的结构与性能进行了探讨。结果表明:随着羧甲基壳聚糖含量的增加,共混膜的透气率增大,加入交联剂戊二醛有效地改善了共混膜的力学性能,但其透气率有所降低;当丝素与羧甲基壳聚糖的质量比为4/1时,共混膜的断裂强度最大,力学性能较好,共混膜相容性较好,其断面光滑、致密。制备丝素/羧甲基壳聚糖共混膜的较佳条件为:丝素中的甘油质量分数为15%,戊二醛质量分数为0.075%,丝素与羧甲基壳聚糖质量比为4/1。 相似文献
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壳聚糖(CTS)和水杨醛、环氧氯丙烷交联制备壳聚糖衍生物(RS-CTS-E),并制备相应衍生物的凝胶膜,将凝胶膜浸没在一定浓度碘乙醇溶液中,制备改性壳聚糖加碘膜(RS-CTS-E-I2),并对其进行了IR、SEM等表征。碘含量分析表明:改性壳聚糖凝胶膜对单质碘吸附量随碘乙醇溶液浓度增加而增大。碘吸附动力学结果表明其平衡吸附时间为6 h。抑菌性测试结果表明,w(I2)=19.05%时RS-CTS-E-I2膜对金黄色葡萄球菌抑菌环和大肠杆菌抑菌环的抑菌环直径分别为(31±1)mm和(30±1)mm,均为高度敏感。 相似文献
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Chitosan scaffolds have gained much attention in tissue engineering. However, brittleness and low biodegradability limit scaffolds application, especially in use as guided tissue regeneration membranes (GTRm) in surgical operations. The first objective of this work is to improve the brittleness of the chitosan membrane, which is not desired for use via adding polyethylene glycol (PEG) to chitosan, and the second objective is to accelerate the degradation rate by blending gelatin with the binary chitosan‐PEG mixture. The addition of PEG softened the blend membrane in vision and in touch. The tensile compliant increased from 7.87 × 10?3 (MPa?1) for chitosan membrane to 3.63 × 10?1 (MPa?1) for chitosan‐PEG‐gelatin (CPG) membrane. Degradation results in vitro indicated that CPG membrane degraded faster and weight loss increased more significantly than chitosan membrane and the lowest tensile strength of CPG membrane could meet the requirement of the application. CPG membrane showed significant improvement in degradation and flexibility in comparison with the chitosan membrane. Cell adhesion, viability, and proliferation onto the external surface of CPG membrane with C2C12 cell had been evaluated in vitro and quantified by a methyl thiazolyl tetrazolium (MTT) reduction assay. © 2009 Wiley Periodicals, Inc. J Appl Polym Sci, 2009 相似文献
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凝固浴处理对聚氨基葡糖超滤膜分离性能的影响 总被引:2,自引:0,他引:2
采用凝固浴凝胶工艺处理聚氨基葡糖超滤膜,实验结果表明,经凝固浴处理后,聚氨基葡糖超滤膜对酸性红B溶液的截留率提高了83.7%;凝固浴的温度、凝固剂的浓度、凝固时间等参数对聚氨基葡糖超滤膜的截留率、渗透通量和孔结构均有一定的影响,选择适当的处理条件可提高膜的分离效率. 相似文献
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以天然高分子材料壳聚糖为原料,采用流延法制备了壳聚糖膜。研究了N-乙酰化和交联壳聚糖膜的制备方法及性能特性等。通过FTIR、XRD和SEM方法表征结构,并测试了力学性能。试验结果表明交联和乙酰化可以增加壳聚糖膜的拉伸强度提高膜的性能。 相似文献