用響應面法優(yōu)化在微波輻射下殼聚糖降解性能的研究畢業(yè)論文設計-wenkub
2023-07-10 23:05:12 本頁面
【正文】 耗大、污染嚴重。由于分子中Ｃ2 位上的氨基反應活性大于 因制備工藝條件和需求的不同，脫乙酰度為60% ～100% 不等。the degree of deacetylation目錄引言 ....................................................................................................................................................11 實驗部分 ........................................................................................................................................21. 1 實驗儀器及藥品 ................................................................................................................21. 2 實驗方法 ............................................................................................................................21. 2. 1 殼聚糖溶液的制備 ................................................................................................21. 2. 2 殼聚糖的微波降解 ................................................................................................21. 2. 3 脫乙酰度的測定 ....................................................................................................21. 2. 4 相對分子質量的測定 [7].........................................................................................31. 2. 5 響應面分析因素水平的選取 ........................................................................................3 結果與分析 .........................................................................................................................32 結果與討論 ....................................................................................................................................62. 1 輻射功率對殼聚糖降解性能的影響 ................................................................................62. 2 輻射時間對殼聚糖降解性能的影響 ................................................................................62. 3 pH 值對殼聚糖降解性能的影響 ......................................................................................72. 4 pH 值為 7~ 8 時反應時間對降解的影響 ........................................................................72. 5 微波促進殼聚糖降解機理的探討 ....................................................................................73 結論 ................................................................................................................................................8參考文獻 ............................................................................................................................................9致謝 ..................................................................................................................................................101引言甲殼素是自然界貯量僅次于纖維素的第二大天然高分子材料, 廣泛存在蝦、蟹和昆蟲等節(jié)肢類動物的外殼及菌、藻等低等植物的細胞壁中, 估計自然
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