本文選題：量子點 + 應(yīng)變監(jiān)測　； 參考：《華東理工大學(xué)》2017年碩士論文

【摘要】：設(shè)備失效作為影響工業(yè)生產(chǎn)的重要問題之一,通常是由于未能及時監(jiān)測到設(shè)備應(yīng)力應(yīng)變狀況發(fā)生改變,從而影響設(shè)備結(jié)構(gòu)的安全運(yùn)行。而現(xiàn)有的應(yīng)力應(yīng)變監(jiān)測技術(shù)仍存在局限性,并不能廣泛應(yīng)用于工業(yè)生產(chǎn)中。本文基于CdSe/ZnS核殼量子點,研究其在不同載荷下熒光特征的變化情況。以量子點為對象,研究其在不同的環(huán)境條件下,測試其熒光特征光譜的穩(wěn)定性,并對其光活化機(jī)機(jī)理進(jìn)行探索;同時,通過實驗測試量子點-環(huán)氧樹脂復(fù)合材料的熒光特征強(qiáng)度與應(yīng)力應(yīng)變之間的關(guān)系并進(jìn)行機(jī)理解析。論文主要獲得以下研究成果:(1)量子點在紫外激發(fā)下,水分子能夠?qū)ζ浔砻娴娜毕葸M(jìn)行鈍化,并增強(qiáng)其熒光特征強(qiáng)度;而空氣中的氧氣則會對量子點表面進(jìn)行氧化腐蝕,并減小其尺寸。(2)通過分析量子點-環(huán)氧樹脂試樣在實驗前后的TEM圖像,結(jié)果顯示試樣熒光特征強(qiáng)度在受到拉伸、壓縮及沖擊載荷時發(fā)生改變的現(xiàn)象主要是由于量子點在環(huán)氧樹脂中的濃度變化引起的。
[Abstract]:As one of the most important problems affecting industrial production, equipment failure is usually due to the failure to monitor the change of equipment stress and strain state in time, thus affecting the safe operation of equipment structure. However, the existing stress-strain monitoring technology is still limited and can not be widely used in industrial production. Based on CdSe/ZnS core-shell quantum dots, the variation of fluorescence characteristics under different loads is studied. The stability of fluorescence characteristic spectra of quantum dots under different environmental conditions was studied, and the mechanism of their photoactivators was explored. The relationship between the fluorescence characteristic strength and stress strain of quantum dot-epoxy resin composite was measured and the mechanism was analyzed. In this paper, the following research results are obtained: (1) under UV excitation, water molecules can passivate the defects on the surface of quantum dots and enhance their fluorescence characteristic strength, while oxygen in the air can oxidize the surface of the quantum dots. By analyzing the TEM images of quantum dot-epoxy resin samples before and after the experiment, the results show that the fluorescence characteristic strength of the samples is tensile. The change of compression and impact load is mainly due to the change of quantum dot concentration in epoxy resin.
【學(xué)位授予單位】：華東理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：O657.3;TB332

【相似文獻(xiàn)】

相關(guān)期刊論文 前10條

1 季雷華;高素蓮;張斌;;量子點的合成、毒理學(xué)及其應(yīng)用[J];環(huán)境化學(xué);2008年05期

2 王富;劉春艷;;發(fā)光碳量子點的合成及應(yīng)用[J];影像科學(xué)與光化學(xué);2011年04期

3 伊魁宇;王猛;邵明云;;量子點作為離子探針的分析應(yīng)用[J];廣州化工;2012年11期

4 羅慧;李曦;方婷婷;劉鵬;;量子點的毒性研究進(jìn)展[J];材料導(dǎo)報;2013年19期

5 田瑞雪;武玲玲;趙清;胡勝亮;楊金龍;;碳量子點的氨基化及其對發(fā)光性能的影響[J];化工新型材料;2014年01期

6 ;“量子點”晶體將推動部分物理工藝的進(jìn)步[J];光機(jī)電信息;2002年10期

7 徐萬幫;汪勇先;許榮輝;尹端l，

本文編號：1945089