本文選題：大豆分離蛋白膜　切入點：復(fù)合改性　出處：《北京林業(yè)大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：塑料包裝材料可降解性差,是“白色污染”的主要來源。研發(fā)性能優(yōu)良、可自然降解的新型膜材料是塑料包裝領(lǐng)域的重要課題。大豆分離蛋白膜材料是一種“新型綠色生物質(zhì)膜材料”,具有良好成膜性和可生物降解性,但存在著耐水性差和和機械性能低等缺點,限制了其在包裝工業(yè)中的應(yīng)用。本文以大豆分離蛋白為基材,丙三醇三縮水甘油醚(PTGE)、聚乙烯醇(PVA)、聚丙烯酰胺(PAM)等為改性劑,制備了改性大豆分離蛋白膜,以探究大豆蛋白膜的耐水性和機械性能。利用傅立葉變換紅外光譜儀(FTIR)、X-射線衍射(XRD)、熱重分析(TG)、掃描電子顯微鏡(SEM)等對膜性能和微觀結(jié)構(gòu)進行了分析。得出主要結(jié)論如下：(1)PVA的加入能夠降低復(fù)合膜的氨基含量,提高其結(jié)晶度,并與大豆分離蛋白之間形成氫鍵,從而提高膜的熱穩(wěn)定性、力學(xué)性能和耐水性；添加PVA和PTGE后,通過PVA、SPI和PTGE之間發(fā)生的交聯(lián)反應(yīng),復(fù)合膜的熱穩(wěn)定性和表面親水性顯著提高,膜的力學(xué)性能和耐水性也均有所提高。(2)PAM與大豆分離蛋白的相容性較好,并能形成氫鍵,從而使復(fù)合膜的熱穩(wěn)定性、力學(xué)性能和耐水性顯著提高；PAM與PTGE的加入對復(fù)合膜的結(jié)構(gòu)影響較大。復(fù)合膜的結(jié)晶峰變得尖且窄,并且PAM、SPI和PTGE之間能夠發(fā)生化學(xué)交聯(lián)反應(yīng),使復(fù)合膜的熱穩(wěn)定性、力學(xué)性能和耐水性均有所提高。
[Abstract]:The poor degradability of plastic packaging materials is the main source of "white pollution". Biodegradable membrane material is an important subject in the field of plastic packaging. Soybean protein isolate membrane material is a "new green biomass membrane material" with good film-forming and biodegradability. However, there are some disadvantages such as poor water resistance and low mechanical properties, which limit its application in packaging industry. In this paper, soybean protein isolate, triglycidyl triglycidyl triglyceride (PTGEN), polyvinyl alcohol (PVA), polyacrylamide (PAM) and so on are used as modifiers. The modified soybean protein isolate membrane was prepared. In order to explore the water resistance and mechanical properties of soybean protein films, the properties and microstructure of the films were analyzed by FTIR spectrometer, TGX, TGX, SEM and so on. The main results were as follows: (1) the main results are as follows: (1) the main results are as follows: (1) the main results are as follows: (1) the main conclusions are as follows: (1) the main conclusions are as follows: 1. The addition of PVA as follows can reduce the amino content of the composite membrane. By increasing the crystallinity and forming hydrogen bond with soybean protein isolate, the thermal stability, mechanical properties and water resistance of the membrane were improved. The thermal stability and surface hydrophilicity of the composite membrane were significantly improved, and the mechanical properties and water resistance of the composite membrane were also improved. The compatibility of PAM with soybean protein isolate was better, and the hydrogen bond could be formed, so that the thermal stability of the composite membrane could be improved. The addition of PAM and PTGE has a great influence on the structure of the composite membrane. The crystallization peak of the composite film becomes sharp and narrow, and the chemical crosslinking reaction can take place between PTGE and PAM, which makes the thermal stability of the composite membrane. Both mechanical properties and water resistance were improved.
【學(xué)位授予單位】：北京林業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TQ051.893

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