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合成驅蚊微膠囊的制備與表征

時間:2019-04-21 08:58來源:畢業論文
以殼聚糖和三聚磷酸鈉為壁材驅蚊劑—e為芯材,通過離子凝聚法來制備合成驅蚊微膠囊。采用生物顯微鏡、紅外光譜等測試技術對所制備的微膠囊的形貌特征、粒徑大小、結構組成進行

摘要:以殼聚糖和三聚磷酸鈉為壁材驅蚊劑—e為芯材,通過離子凝聚法來制備合成驅蚊微膠囊。采用生物顯微鏡、紅外光譜等測試技術對所制備的微膠囊的形貌特征、粒徑大小、結構組成進行了分析與表征。本文主要研究了殼聚糖和三聚磷酸鈉成囊的最優比例,正常情況下的芯壁比,并討論了pH值,溫度,不同分子量的壁材對包埋率和包埋效率的影響。結果表明:CS-HAC與TPP的比例1:1時,CS-HAC和TPP充分成膜。隨著pH值的不斷減小,體系酸性增大,包埋率和包埋效率也隨著緩慢增大,當pH等于5時,達到最優,之后在減小pH值,包埋率和包埋效率隨之下降;改變體系溫度時,當T達到50℃時,包埋率和包埋效率達到最優;而當將殼聚糖換成殼寡糖時,分子量減小,與三聚磷酸鈉復合,大大提高了合成驅蚊微膠囊的包埋效率。34774
畢業論文關鍵字:合成驅蚊劑;微膠囊;離子凝聚法;表征
Preparation and characterization of synthetic repellent microcapsules
Abstract :With chitosan and sodium tripolyphosphate as wall and mosquito repellent -e as core material, synthetic repellent microcapsules prepared by ion aggregation method. The use of biological microscopes, infrared spectrum testing technology for topographical features microcapsules prepared, particle size, structure and composition were analyzed and characterized. This paper studies the optimal ratio of chitosan and sodium tripolyphosphate into a capsule, the proportion of core and wall under normal circumstances, and the influence of PH value, temperature, different molecular weight of the wall material for embedding rate and encapsulation efficiency. The results showed that: the ratio of chitosan and tripolyphosphate into 1:1, chitosan and sodium tripolyphosphate full film. With decreasing PH value, the system acidity increases, embedded and embedding efficiency with the slow increasing, when the PH is equal to 5, optimal, after reducing the PH value, embedding rate and packet buried efficiency fall. When changing the temperature of the system, when the temperature reached 50 ℃, encapsulation efficiency and embedding rate is optimal. And when the shells into chitosan oligosaccharide, molecular weight decreases, and sodium tripolyphosphate compound, greatly improving the embedded efficiency of the synthetic of insect microcapsules.
源¥自%六:維;論-文'網=www.aftnzs.live

Keywords: Synthesis of insect repellent; microcapsule; ion coacervation; characterization
目錄
1、緒論    1
1.1 微膠囊及微膠囊制備技術    1
1.1.1微膠囊的概述    1
1.1.2微膠囊壁材的選擇    1
1.1.3微膠囊的制備方法及研究現狀與趨勢    3
1.2驅蚊劑    3
1.2.1驅蚊劑的概述    3
1.2.2驅蚊劑的選擇    4
1.2.3驅蚊劑的研究現狀    4
1.3合成驅蚊微膠囊    5
1.3.1合成驅蚊微膠囊的特點    5
1.3.2合成驅蚊微膠囊的制備    5
1.3.3合成驅蚊微膠囊的研究現狀    6
2、實驗原理和方法    7
2.1實驗原料及儀器    7
2.1.1實驗原料    7
2.1.2實驗儀器    7
2.2實驗原理    8
2.2.1殼聚糖和三聚磷酸鈉反應原理    8
2.2.2實驗工藝流程    8
2.2.3殼寡糖和三聚磷酸鈉反應原理    9
2.2.4實驗工藝流程    10
2.3實驗方法    10
2.3.1殼聚糖溶于冰醋酸發生質子化反應    11
2.3.2微膠囊化    11
2.3.3固化    11
3、實驗設計    12
3.1實驗內容    12 合成驅蚊微膠囊的制備與表征:http://www.aftnzs.live/huaxue/20190421/32416.html
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