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聚乙烯醇胺肟螯合纤维的合成及对钯的吸附 总被引:4,自引:0,他引:4
利用^60Co-γ射线预辐照接枝和胺肟化反应合成了聚乙烯醇胺肟螯合纤维。预辐照剂量支液的组成对接枝率,胺肟基因含量和吸附容量有影响。研究了PVAAO螯合纤维对钯的吸附性能。 相似文献
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含羧基的聚乙烯醇胺肟螯合纤维的合成及对金的吸附 总被引:2,自引:0,他引:2
利用^60Co-γ射线预辐照接枝和胺肟化反应合成了含羧基的聚乙烯醇胺肟螯合纤维。预辐照剂量和接枝单体的比率对接枝率和胺肟基团含量有影响。研究了PVAAO-AAc螯合纤维对金的吸附性能。 相似文献
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利用一次辐照接枝和胺肟化反应合成了含羧基的聚丙烯胺肟(PPAO-AA)螯合纤维。研究了影响接枝率,胺肟基团含量和吸附容量的因素,结果表明,接枝率随预辐照剂量的增加而增加,单体摩尔比为1时,接枝率最高,在pH=5时,对Cu(II)离子的吸附容量达0.84mmol/g干纤维。 相似文献
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含羧基的聚丙烯胺肟型螯合纤维的合成及性能 总被引:7,自引:0,他引:7
利用预辐照接枝法合成了含羧基的聚丙烯胺肟(PPAO-AAc)型螯合纤维。研究了影响接枝率和胺肟基团含量的因素。该纤维对铜(Ⅲ)离子的吸附容量达1.23mgN/g干纤维。 相似文献
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聚丙烯胺肟螯合纤维的合成及性能 总被引:5,自引:0,他引:5
采用^60Co-γ射线预辐照方法合成了聚丙烯胺肟(PPAO)螯合纤维。研究了影响接枝率和胺肟基团含量的因素。结果表明,接枝率随预辐照剂量、单体浓度、反应时间和反应温度的增加而增加。羟胺溶液的pH=7时,胺肟基团含量最高。胺肟化反应时间大于1.5h,胺肟基团含量不再增加。该纤维对金的吸附容量为99.1mg/g干纤维,对钯和铜也有较好的吸附性能。 相似文献
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以水合联胺为交联剂,利用"热致相分离"原理制备了聚丙烯腈/二甲亚砜(PAN/DMSO)交联(C-PAN)凝胶,将其进一步与羟胺(NH2OH)反应后得到交联型偕胺肟(C-PAO)凝胶,交联型偕胺肟凝胶可用于吸附强碱性模拟拜耳溶液中的镓离子(Ga~(3+))。文中采用了超临界CO_2萃取干燥法取代真空干燥,并探讨了不同溶度参数的交换溶剂对凝胶孔径的影响。红外测试结果表明,凝胶成功偕胺肟化且偕胺肟基团与镓离子发生了螯合作用;扫描电镜照片显示,当交换溶剂的溶度参数与PAN基体的差值(Δδ)增加,得到的凝胶孔径减小;吸附测试结果显示,偕胺肟凝胶对模拟拜耳溶液中镓离子的饱和吸附量为15.8 mg/g,平衡时间为140 min。 相似文献
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Debije MG Verbunt PP Nadkarni PJ Velate S Bhaumik K Nedumbamana S Rowan BC Richards BS Hoeks TL 《Applied optics》2011,50(2):163-169
We describe the synthesis of a dye based on a perylene perinone and evaluate its potential as the functional material for use in the luminescent solar concentrator (LSC). The dye extends the absorption wavelength of LSCs using the perylene-based dye Lumogen Red 305 by more than ~50 nm, translating into the collection of potentially 25% more photons at a reasonable fluorescent quantum yield and photostability. When the new perinone is used in a two-waveguide LSC in conjunction with Red 305, the integrated edge emission of the total LSC system may be increased more than 24% when compared to the Red 305 dye alone. 相似文献
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泡沫铝在噪声控制中的应用 总被引:12,自引:1,他引:11
在基体中分散着无数气泡的泡沫铝是一种用途广泛的功能材料。文中概述了泡沫铝的吸声机理、吸声结构,以及气孔率、压缩率、板厚、空气层厚度对泡沫铝吸声性能的影响,给出了泡沫铝用于噪声控制的典型实例。 相似文献
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H. K. Seo Farheen S. A. Ansari Nazish Parveen Shabeena Qadir H. Fouad H. S. Shin Moo Hwan Cho S. G. Ansari Z. A. Ansari 《Journal of Materials Science: Materials in Electronics》2017,28(4):3210-3216
Extensive research have been made in improving the dye sensitized solar cells (DSSC) performance by designing, tailoring and enhancing the photoconversion properties of the matrix. The approaches used are material synthesis, dye permutation combinations, use of natural extracts or using several sensitizers. The polymers are also being explored in this regards in their pristine or composite forms. Therefore, in this study an attempt is made to synthesize a mesoporous polyaniline–titanium dioxide (PANI–TiO2) nanocomposites with one pot synthesis approach at different concentrations of PANI (0.3–0.7 ml). Titanium isopropoxide was used as precursor for TiO2 with aniline and the material was synthesized at ice bath temperature. Morphological observations showed that the composite is a mesoporous material with tubular structure where TiO2 particles are seen entrapped in the polymer matrix and found that intercalation can be tailored with PANI concentration. Structural, functional and optical characterization indicate anatase phase of TiO2, with several functional bands that can help in dye interaction and broad absorption bands within visible region. The photocurrent-voltage response was measured with simulated light and source-meter. It is interesting to note that increasing PANI concentration enhances the mesoporous structure and hence increases the dye loading capacity and photoconductivity of the material. The efficiency increased by about 22 % with addition of 0.5 ml of PANI from 0.3 ml. The proposed study has indicated that such material have the potential to be used for DSSC fabrication with which the device performance can further be increased to a better levels. 相似文献
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类石墨烯氮化碳具有与石墨烯非常相似的结构特征,已在光催化、润滑等领域表现出极优越的性能,成为二维纳米功能材料领域的新热点。本文重点介绍了基于微波辐照合成类石墨烯氮化碳的研究进展,并通过与氧化刻蚀、液相超声剥离、热聚合等传统合成方法的比较,分析了微波合成在制备效率、效果上的优势;并指出采用高功率微波设备和石墨粉、短切碳纤维等对微波具有强烈响应的微波吸收剂,通过增强能量传递与吸收效率,强化微波电磁场环境下合成反应的非稳态程度,有助于提高合成效率、效果,并获取得到特殊形态、结构的新产物。 相似文献
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The influence of roughness of plastic substrate was investigated regarding low e functional film properties. Using a rough surface results in increased absorption in the visible spectral range. This absorption is mainly caused by surface plasmon excitation. In order to achieve high transmittance (Tvis) – which is required for the application in insulating glass units – it is required to use smooth substrate surfaces. An appropriate pre conditioning of the substrate can provide improved surface conditions. The strength and spectral position of the plasmon resonance is also determined by the dielectric material surrounding the silver. A high refractive index material is required to anti‐reflect the silver properly. But on rough surfaces this may result in increased absorption. One possibility to overcome the strong absorption is applying an intermediate layer with lower index next to the silver. 相似文献
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聚二甲基二烯丙基氯化铵合成及与牛血清蛋白络合表征研究 总被引:4,自引:0,他引:4
用过硫酸盐氧化还原体系在一定条件下合成的聚二甲基二烯丙基氯化铵(PDADMAC)高聚物是具有多种用途的离子型功率高分子材料,可作为生物高分子材料应用于医学技术上,并可与蛋白质进行络合,通过紫外吸收光谱法测定出一定环境下此高聚物与牛血清蛋白(BSA)的络合比,并观察了pH值和离子浓度对络合的影响。 相似文献
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以氧化石墨烯(GO)、硝酸银和聚乙烯亚胺(PEI)为原料,制备了纳米银片/改性石墨烯(rGO-PEI-AgNPs)复合材料,并以二浸二轧的方式处理到棉织物上。通过FTIR、XPS、XRD、UV等测试手段对rGO-PEI-AgNPs材料以及rGO-PEI-AgNPs材料负载的棉织物进行结构表征,利用矢量网络分析仪(VNA)对rGO-PEI-AgNPs材料及其负载棉织物进行了微波吸收性能测试。SEM测试结果显示,GO-PEI材料表面成功生长了三角形状的纳米银片。研究表明,当rGO-PEI-AgNPs的质量分数为5 %时,材料的最小反射损耗可达到-37.8 dB,织物的最小反射损耗可达到-29 dB。本文制备的米银片/改性石墨烯(rGO-PEI-AgNPs)复合材料,能够有效赋予棉织物微波吸收性能,不仅可促进功能性纺织品发展,也拓宽了吸波材料的应用范围。 相似文献