共查询到19条相似文献,搜索用时 125 毫秒
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基于大豆分离蛋白的环境友好型包装材料研究进展 总被引:1,自引:0,他引:1
《食品与发酵工业》2019,(24):269-277
大豆分离蛋白膜具有良好的气体阻隔性和生物降解性,常通过干法或湿法进行制备,但其较弱的机械性能限制了其在食品体系中的广泛应用。可以通过对蛋白进行改性处理以及与多糖复合等手段提升单一大豆分离蛋白膜的功能特性。该文论述了以大豆分离蛋白为基础物质构建可食膜材料的方法、改性技术以及相关性能指标,并探讨了大豆分离蛋白基可食膜对功能因子的稳定作用以及在食品保鲜方面的应用;同时对研发性能优良、具有多功能的可食用包装材料进行展望,以期为环境友好型包装材料的开发提供参考。 相似文献
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采用超声波对纳米SiO2进行分散,为探讨纳米SiO2的分散情况对大豆蛋白/PVA复合薄膜性能的影响,通过单因素试验和正交试验,对复合薄膜的性能进行了系统研究。试验结果表明:纳米SiO2的超声时间,超声温度和超声功率对复合薄膜的性能均有影响;当超声温度为45℃,超声功率为160W,超声时间为40min时得到的复合膜性能最佳,其中超声温度对薄膜的性能影响最大,其次是超声功率和超声时间;在最佳条件下,薄膜的抗张强度为9.33MPa,伸长率为76.13%,透光率为21.85%,吸水率为47.77%。 相似文献
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超声波制备纳米SiO2-马铃薯淀粉复合膜性能优化及结构表征 总被引:1,自引:0,他引:1
为提高纳米SiO2在马铃薯淀粉膜中的分散性以增强纳米复合膜的包装保鲜性能,通过2?次超声波处理制备纳米SiO2-马铃薯淀粉复合膜,以马铃薯淀粉用量、甘油用量、纳米SiO2用量为考察因素,对纳米复合膜的性能进行正交试验优化,对其进行微观结构表征,以及对采后双孢蘑菇进行包装保鲜实验。结果表明,超声波使纳米SiO2较均匀地分散在马铃薯淀粉膜中,且适合超声波合成纳米复合膜的最佳膜液配比为马铃薯淀粉用量3.5?g/100?mL、甘油用量3?g/100?mL、纳米SiO2?用量0.3?g/100?mL。X-射线衍射光谱与傅里叶变换红外光谱分析证实超声波合成法使纳米SiO2与马铃薯淀粉分子间形成较强的氢键;紫外光谱分析表明超声波合成的纳米复合膜具有较好的抗紫外光作用。此外,超声波合成的纳米复合膜包装保鲜性能得到增强,其透水率、透氧率、水溶性较普通合成的纳米复合膜分别降低了30.22%、71.16%、39.61%,拉伸强度提高了17.82%,可较好地控制双孢蘑菇贮藏过程中活性氧的代谢,延长其货架期。 相似文献
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改善大豆分离蛋白膜性能的研究进展 总被引:13,自引:0,他引:13
大豆分离蛋白膜可用于水果和肉制品的涂膜保鲜及可食性包装等,是一种很有发展前途的可食性膜,但与其他可食性膜相比,其阻湿性能和机械性能较差,需采用适当的处理方法来改善。常用的处理方法有:热、碱处理、还原剂处理、交联剂处理,添加脂类处理,超声波处理,紫外辐射处理,超高压处理,复合膜处理等。其中,复合膜具有复合的几种材料各自所成膜的优点,是可食性膜今后的发展方向。 相似文献
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Milk Protein-based Edible Film Mechanical Strength Changes due to Ultrasound Process 总被引:4,自引:0,他引:4
The effects of ultrasound frequency, acoustic power, and exposure time on the functional properties of whey protein concentrate and sodium caseinate films were examined. Average tensile strength of the ultrasound treated caseinate films was 224% higher than that of the control. The ultrasonic process was more effective on sodium caseinate than whey protein concentrate film. Resistance to puncture was improved for both types of films treated at an acoustic power of 5.22W. Increased exposure time resulted in stronger films. Elongation at break, water vapor permeability, and moisture content of films were not affected by the treatment. Ultrasound showed potential for improving mechanical strengths of milk protein films. 相似文献
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The effects of ultrasonic/microwave assisted treatment on the properties of soy protein isolate/microcrystalline wheat-bran cellulose film 总被引:2,自引:0,他引:2
Zhe Wang Xiu-xiu Sun Zi-xuan Lian Xiao-xuan Wang Jing Zhou Zhong-su Ma 《Journal of food engineering》2013
Wheat-bran cellulose (WC) and microcrystalline wheat-bran cellulose (MWC) were prepared, and edible films containing different ratios of soy protein isolate (SPI) with WC, MWC, and ultrasonic/microwave modified MWC (MMWC) were made by casting. The different proportions and particle size of the fillers (WC, MWC, and MMWC) affected the properties of each of the films. The SPI/MMWC film demonstrated the best properties: MMWC had a smaller particle size and more free hydroxyls on the surface, enabling the formation of stronger intra-molecular hydrogen bonds with SPI that yielded a blend film with a homogeneous, compact structure. The different thermal properties of the films were also mainly attributed to their structures. In addition, FT-IR showed the association between SPI and the fillers, while SEM showed that the surface morphology of the SPI/MMWC film was smoother and more homogeneous. 相似文献
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利用超声波-微波协同技术制备玉米磷酸酯淀粉/秸秆纤维素(corn distarch phosphate/corn straw cellulose,CDP/CSC)可食膜,探讨超声波-微波处理条件对膜机械性能的影响。以抗拉强度(tensile strength,TS)和断裂伸长率(elongation at break,EAB)为指标,通过响应面分析优化得到最佳工艺条件为:超声波功率600 W、微波功率170 W、超声波-微波时间9 min。在此条件下可食膜的TS和EAB分别达到31.42 MPa和74.33%,与未经超声波-微波处理的膜相比分别提高62.29%和56.88%。通过扫描电子显微镜、傅里叶变换红外光谱分析和X射线衍射对可食膜进行结构观察和表征,经超声波-微波协同处理的CDP/CSC可食膜表面平整,结构致密,分子间作用力加强。超声波-微波联合作用可有效提高CDP/CSC可食膜的机械性能。 相似文献
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Nanomaterials are often introduced to improve the properties of polymers. In this article, the effects of SiO2 nanoparticles with lager specific areas and special microstructural characters on the properties of starch films were investigated. Firstly, the ultrasonic mixing was used to disperse the SiO2 nanoparticles under different dispersion times, and then the dispersed SiO2 nanoparticles with various ratios were added into starch size. The effects of the dispersion time and the SiO2 content on the mechanical properties of the SiO2/starch composite size were analysed. It was found that the dispersion time and the SiO2 content had significant effects on the tensile and abrasion behaviour of the nanocomposite films. The mechanism of the enhanced mechanical properties of the composite films was examined by analysing the size of the dispersed SiO2 nanoparticles in the dispersion, the surface characters of the films and the structures of the fractured surfaces. And the morphology of the abraded surface was analysed by atomic force microscopy, scanning electron microscope and video zoom microscope. 相似文献
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本工作以十二烷基硫酸钠(SDS)和脂肪醇聚氧乙烯醚(AEO-9)为乳化剂,采用细乳液聚合的方法,制备了甲基丙烯酸甲酯(MMA)、丙烯酸丁酯(BA)和全氟烷基丙烯酸酯(FA)三元共聚物。采用Fr—IR、^1H—NMR对聚合物的结构进行了表征;采用接触角法研究聚合物乳胶膜的表面性能。系统考察了超声均质强度(超声功率)、超声时间、FA用量、乳化剂用量等因素对细乳液聚合稳定性和乳液粒径及其分布的影响,优化的较佳细乳化工艺为:超声功率300W、超声时间3min、乳化剂用量为2.5%,FA单体质量分数〉4%;所制备的聚合物乳胶膜在低含氟量下即表现出优异的疏水疏油性能。 相似文献
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利用超声波微波协同技术,制备玉米醇溶蛋白/壳聚糖复合膜。以拉伸强度为考核指标,选择超声波功率、微波温度、超声波微波协同作用时间、搅拌转速作为优化因素,在单因素试验基础上,通过正交试验确定最佳工艺参数。结果表明:最优工艺为超声波功率180 W、微波温度50 ℃、协同作用时间6 min、搅拌转速300 r/min,在此条件下,复合膜的拉伸强度为(19.98±0.34) MPa。微观研究表明,复合膜的微观形态结构得到改善,通过扫描电子显微镜观察,复合膜表面平整,颗粒感较少。红外光谱分析表明超声波微波协同作用对分子结构没有明显破坏。 相似文献