本文選題：膜　切入點(diǎn)：卟啉　出處：《天津工業(yè)大學(xué)》2017年碩士論文

【摘要】：卟啉因其特殊的化學(xué)結(jié)構(gòu)和光電特性而被廣泛地應(yīng)用于生物、化學(xué)以及物理領(lǐng)域,本文利用TMPyP的帶電性,分別將其負(fù)載在PSF-PNaSS和水解PAN膜表面,并根據(jù)TMPyP易與重金屬離子配位的特性著重研究了PSF-PNaSS/TMPyP 和 PAN-TMPyP-(PAH-PSS)n功能膜對 Cd2+的檢測效果。PSF-PNaSS/TMPyP功能膜在動(dòng)態(tài)條件下對Cd2+的檢測。由于TMPyP與Cd2+的可逆配位作用,功能膜表現(xiàn)出對水中Cd2+良好的富集作用,并通過光譜和表觀顏色的變化,實(shí)現(xiàn)檢測功能,同時(shí)具有很好的再生能力。研究表明,Cd2+初始溶液濃度越小,流速越小,功能膜吸附檢測速率越緩慢;通過控制TMPyP負(fù)載量等條件,可實(shí)現(xiàn)對痕量Cd2+的富集與檢測;與靜態(tài)吸附檢測過程相比,動(dòng)態(tài)條件更有利于Cd2+的擴(kuò)散及在膜表面的富集,鎘離子濃度為0.01mg/L時(shí),功能膜對鎘離子的檢測時(shí)間由靜態(tài)時(shí)的6h減少到60分鐘左右。通過層層自組裝技術(shù)在PAN-TMPyP功能膜表面交替吸附帶正電的聚電解質(zhì)聚丙烯胺鹽酸鹽(PAH)和帶負(fù)電的聚電解質(zhì)對苯乙烯磺酸鈉(PSS),從而使TMPyP在膜表面更加穩(wěn)定,同時(shí)解決了聚砜/卟啉功能膜(PSF-PNaSS/TMPyP)上TMPyP分布不均勻、SI-ATRP法接枝率不好控制以及TMPyP在膜表面穩(wěn)定性不好等缺點(diǎn)。研究表明PAN-TMPyP-(PAH-PSS)n功能膜對鎘離子的檢測和PSF-PNaSS/TMPyP功能膜相似:Cd2+進(jìn)料液濃度越大、透過液流速越快、卟啉(TMPyP)負(fù)載量越小,功能膜吸附檢測速率越快,與靜態(tài)吸附檢測過程相比,動(dòng)態(tài)條件更有利于功能膜對Cd2+的檢測,功能膜顯示出更快的檢測速度,鎘離子濃度為0.001mg/L時(shí),PAN-TMPyP-(PAH-PSS),功能膜對鎘離子的檢測時(shí)間由靜態(tài)時(shí)的3h減少到100分鐘左右。PAN-TMPyP-(PAH-PSS)n功能膜可以通過調(diào)節(jié)膜結(jié)構(gòu)使功能膜對鎘離子有截留作用,截留作用使進(jìn)料液一側(cè)鎘離子的濃度大大提高,從而提高了功能膜對鎘離子的檢測速度,截留率為55%的PAN-TMPyP-(PAH-PSS)n功能膜檢測1mg/L的鎘離子溶液達(dá)到平衡需要75mL,而截留率為80%的PAN-TMPyP-(PAH-PSS)n功能膜檢測1mg/L的鎘離子溶液達(dá)到平衡需要25mL。
[Abstract]:Porphyrins are widely used in biological, chemical and physical fields because of their special chemical structure and photoelectric properties. In this paper, porphyrins are loaded on the surface of PSF-PNaSS and hydrolyzed PAN films respectively by using the charge property of TMPyP. According to the characteristics of TMPyP easy to coordinate with heavy metal ions, the detection effect of PSF-PNaSS/TMPyP and PAN-TMPyP-(PAH-PSS)n functional membrane on Cd2. PSF-PNASS / TMPyP functional membrane was used to detect Cd2 under dynamic conditions. Because of the reversible coordination between TMPyP and Cd2, The functional membrane showed a good enrichment effect on Cd2 in water, and the detection function was realized by changing the spectrum and apparent color. The results showed that the lower the initial concentration of CD _ 2, the lower the flow rate, and the better the regeneration ability was. By controlling the loading amount of TMPyP, trace Cd2 can be enriched and detected. Compared with static adsorption, the dynamic conditions are more favorable to the diffusion of Cd2 and the enrichment on the membrane surface. When the concentration of cadmium ion is 0.01mg/L, The detection time of cadmium ion by functional membrane was reduced from 6 h at static state to about 60 minutes. The polyelectrolyte polyelectrolyte polyacrylamide hydrochloride with positive charge and negative charge were adsorbed alternately on the surface of PAN-TMPyP functional membrane by layer by layer self-assembly technique. The hydrolysis of sodium styrenesulfonate (TMPyP) made TMPyP more stable on the surface of the membrane. At the same time, the defects such as poor grafting rate of TMPyP and poor stability of TMPyP on the surface of PSF-PNaSS / TMPyP-) were solved. The results showed that the concentration of CD _ 2 in PAN-TMPyP-(PAH-PSS)n functional membrane was higher than that in PSF-PNaSS/TMPyP functional membrane, which was similar to that of PSF-PNaSS/TMPyP functional membrane, and the grafted ratio of TMPyP on the surface of the membrane was not well controlled by SI-ATRP method, the results showed that the concentration of CD _ 2 was similar to the concentration of CD _ 2 in PAN-TMPyP-(PAH-PSS)n functional membrane. The faster the flow rate of permeation liquid, the smaller the loading of porphyrin monophosphate, and the faster the detection rate of functional membrane adsorption. Compared with the static adsorption detection process, the dynamic condition is more favorable to the detection of Cd2 by functional membrane, and the detection speed of functional membrane is faster than that of static adsorption detection process. When the concentration of cadmium ion is 0.001mg/L, the detection time of PAN-TMPyP-NPAH-PSSN can be reduced from 3h at static state to about 100min. PAN-TMPyP-PAH-PSSn functional membrane can intercept cadmium ion by adjusting the membrane structure. The concentration of cadmium ions on one side of the feed solution was greatly increased by interception, and the detection speed of cadmium ion was improved by the functional membrane. For PAN-TMPyP-(PAH-PSS)n functional membrane with a rejection rate of 55%, the CD ion solution of 1mg/L needs 75 mL to achieve equilibrium, while for 80% PAN-TMPyP-(PAH-PSS)n functional membrane to reach the equilibrium of CD ion solution in 1mg/L, 25 mL is required for the detection of CD ion solution in 1mg/L.
【學(xué)位授予單位】：天津工業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TQ028.8

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