本文選題：離子印跡聚合物　切入點：表面印跡技術(shù)　出處：《青海大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

【摘要】：隨著社會經(jīng)濟(jì)的不斷發(fā)展,水環(huán)境污染日益嚴(yán)重,吸附法處理含金屬離子廢水具有操作簡單,去除效率高等優(yōu)點已得到了廣泛應(yīng)用。然而,傳統(tǒng)吸附劑去除金屬離子存在選擇性差、水熱穩(wěn)定性低、循環(huán)使用性不好等不足。近年來,具有特異識別功能的離子印跡聚合物得到越來越多的關(guān)注。其中,表面印跡技術(shù)又因其結(jié)合位點被限定在具有良好可接近性的材料表面上,吸附速度更快,識別性更好,離子印跡更容易洗脫等優(yōu)點而被深入研究。本論文分別以硅膠、SBA-15為基底材料,采用表面印跡技術(shù),制備離子表面印跡聚合物。利用紅外光譜(FT-IR)、能量色散X射線譜(EDS)、X射線粉末衍射(XRD)、掃描電鏡(SEM)、透射電鏡(TEM)、氮氣吸附-脫附、熱重分析(TGA)等測試手段對產(chǎn)物進(jìn)行表征。研究所制備材料的吸附性能,包括平衡吸附時間、平衡吸附量,選擇性及循環(huán)使用性能等。具體研究結(jié)果如下:(1)以鈷離子為模板離子,硅膠為基底,(3-巰基丙基)三甲氧基硅烷為功能單體,環(huán)氧氯丙烷為交聯(lián)劑,采用表面印跡技術(shù)制備并表征了鈷離子印跡聚合物(Co(II)-IIP),吸附結(jié)果表明,在25°C,pH=5~6時,最大吸附量為20.05 mg/g。Co(II)-IIP對Co(II)/Cd(II)、Co(II)/Pb(II)、Co(II)/Cu(II)、Co(II)/Ni(II)吸附選擇性系數(shù)分別為2.52、1.34、3.61、4.39。經(jīng)5次吸附-解吸循環(huán)后,Co(II)-IIP對鈷離子的吸附效果并沒有明顯下降,表明Co(II)-IIP具有一定的循環(huán)利用性能。(2)以SBA-15為基底,銅離子為模板離子,甲基丙烯酸為功能單體,乙二醇二甲基丙烯酸酯為交聯(lián)劑,成功制備了Cu(II)-IIP。研究結(jié)果表明,在25°C、pH=7時,最大吸附量為25.03 mg/g。Cu(II)-IIP對Cu(II)具有較好的選擇性。(3)采用表面印跡技術(shù),以銫離子為模板,殼聚糖為功能單體,在介孔材料SBA-15表面進(jìn)行氨基化、醛基化修飾,成功制備了Cs(I)-IIP。對產(chǎn)物進(jìn)行了充分表征。結(jié)果表明,Cs(I)被成功印跡,且Cs(I)-IIP仍保持著有序介孔結(jié)構(gòu)。研究了Cs(I)-IIP對水溶液中Cs(I)的吸附性能,在25°C,pH=5~6,最大吸附量為36.19 mg/g,Cs(I)-IIP對Cs(I)具有較好的選擇性。
[Abstract]:With the development of society and economy, the pollution of water environment is becoming more and more serious. The treatment of metal-ion wastewater by adsorption method has many advantages such as simple operation, high removal efficiency and so on. However, the adsorption method has been widely used in the treatment of wastewater containing metal ions. The removal of metal ions by traditional adsorbents has some disadvantages, such as poor selectivity, low hydrothermal stability and poor recycling. In recent years, ionic imprinted polymers with specific recognition function have attracted more and more attention. Surface imprinting technology, because its binding sites are confined to the surfaces of materials with good accessibility, are faster to adsorb and more recognizable. Ion imprinting is more easy to be eluted and has been studied deeply. In this thesis, silicon gel SBA-15 was used as substrate material, and surface imprinting technique was used. Ion surface imprinted polymers were prepared by FTIR spectroscopy, energy dispersive X-ray spectroscopy (EDS), X-ray powder diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), nitrogen adsorption-desorption. Thermogravimetric analysis (TGA) and other testing methods were used to characterize the product. The adsorption properties of the prepared materials, including equilibrium adsorption time, equilibrium adsorption capacity, selectivity and recycling performance, were investigated. The specific results are as follows: 1) the cobalt ion is used as the template ion. The cobalt ion imprinted polymer, CoHI-IIPN, was prepared and characterized by surface imprinting technique with silica gel as substrate, trimethoxysilane as functional monomer and epichlorohydrin as crosslinking agent. The adsorption results showed that the pH value of the imprinted polymer was 5 ~ 6:00 at 25 擄C ~ (-1). The maximum adsorption capacity is 20.05 mg/g.Co(II)-IIP. The adsorption selectivity coefficient of CoII / NII / NiII / CoII / NII / NII / NII / NII / NII / NII / NII / NII / NII / NII / NII is 2.52 / 1.343.61N / 4.39.The adsorption effect of CoIII-IIP on cobalt ion has not been significantly decreased after five adsorption-desorption cycles, indicating that Co(II)-IIP has a certain recycling performance. (2) on the basis of SBA-15, the adsorption efficiency of CoIII-IIP is not significantly decreased, which indicates that CoIII-IIP has a certain recycling performance on the basis of SBA-15, and the adsorption efficiency of CoIII-IIP is not significantly decreased after 5 times of adsorption-desorption cycles. Copper ion was used as template ion, methacrylic acid as functional monomer and ethylene glycol dimethacrylate as crosslinking agent. The maximum adsorption capacity was 25.03 mg/g.Cu(II)-IIP. The best selectivity was obtained by surface imprinting technique. Using cesium ion as template and chitosan as functional monomer, the surface of mesoporous SBA-15 was modified by amination and aldehydation. The products were successfully prepared and characterized. The results showed that the Cs(I)-IIP was imprinted successfully, and the Cs(I)-IIP still maintained an ordered mesoporous structure. The adsorption properties of Cs(I)-IIP for CSI in aqueous solution were studied. The maximum adsorption capacity is 36.19 mg / g / g CsSN I ~ (-) -IIP with a good selectivity for CSI at 25 擄C ~ (2 +) pH ~ (5 ~ (5)) ~ (6).
【學(xué)位授予單位】：青海大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：O631.3

【相似文獻(xiàn)】

相關(guān)期刊論文 前10條

1 朱建華;李欣;強(qiáng)亮生;;銅(Ⅱ)離子印跡聚合物的制備及性能[J];高等學(xué)�；瘜W(xué)學(xué)報;2006年10期

2 劉崢;溫玉清;黃美春;;銅離子印跡聚合物的制備及吸附性能[J];桂林工學(xué)院學(xué)報;2007年01期

3 王玲玲;閆永勝;鄧月華;李春香;徐婉珍;;鉛離子印跡聚合物的制備、表征及其在水溶液中的吸附行為研究[J];分析化學(xué);2009年04期

4 賴曉綺;楊遠(yuǎn)奇;薛s，

本文編號：1628892