响应曲面法优化可食玉米醇溶蛋白膜制备工艺

通过单因素试验和响应曲面法,优化了可食玉米醇溶蛋白膜制备工艺。以乙醇体积分数、固液比、油酸用量和膜液加热温度为因素,以断裂伸长率(E)、拉伸强度(TS)、水蒸气透过系数(WVP)为响应值对实验进行响应面设计,建立了断裂伸长率(E)、拉伸强度(TS)、水蒸气透过系数(WVP)的回归模型,优化的工艺条件为乙醇体积分数82%、固液比(g∶mL)1∶10、油酸用量0.5mL/g玉米醇溶蛋白、膜液加热温度70℃。     

响应面法优化马铃薯薯渣可食性膜封口工艺

采用响应面法对可食性膜的封口工艺进行优化。选取膜厚度,封口时间和封口温度为随机因子。在单因素试验的基础上,根据Box-Benhnken中心组合方法进行三因素三水平的试验设计。以封合强度为响应值,进行响应面分析(RSA),结果表明,可食性膜热封试验的最佳工艺条件为:膜厚度为0.083 mm,封合时间为4.6 s,封合温度140.2℃,在此条件下,可食性膜的封合强度理论值为7.493 N/15 mm,验证实测值为7.471 N/15 mm,与理论值相对误差为0.29%。     

可食性包装薄膜的研究进展

通过对近年来可食性薄膜的研究进行综合分析,从而得出当前可食性薄膜的主要制备方法及其发展趋势,为可食性薄膜的深入研究奠定理论基础。经过研究发现,当前国内外可食性薄膜的加工方法大体一致,原材料种类繁多,以多糖类和蛋白质类可食性薄膜居多,薄膜性质大体相同。综合分析得出:国内外可食性薄膜的实验室研究阶段基本成熟,但是,在可食性薄膜的应用方面还有待进一步推广。可食性薄膜是绿色包装材料的典型代表,成膜工艺基本成熟,但工业化生产和推广应用还有待提升,因此,加大对可食性薄膜工业化生产和推广应用的研究势在必行。     

基于响应面分析法的可食性小麦蛋白膜的研究

应用响应面分析法研究了谷朊粉浓度、甘油浓度、pH值、成膜温度对成膜特性的影响。实验结果表明，甘油浓度与pH值及其交互作用对蛋白膜抗拉强度和延伸率影响比较显著；对膜的透水性影响比较大的因素是甘油浓度、温度、谷朊粉浓度及甘油浓度与温度的交互作用；谷朊粉浓度、甘油浓度、pH值、温度以及它们的交互作用对蛋白膜的透氧性的影响都是比较显著的。     

基于响应面分析法的可食性小麦蛋白膜的研究

应用响应面分析法研究了谷朊粉浓度、甘油浓度、pH值、成膜温度对成膜特性的影响。实验结果表明,甘油浓度与pH值及其交互作用对蛋白膜抗拉强度和延伸率影响比较显著;对膜的透水性影响比较大的因素是甘油浓度、温度、谷朊粉浓度及甘油浓度与温度的交互作用;谷朊粉浓度、甘油浓度、pH值、温度以及它们的交互作用对蛋白膜的透氧性的影响都是比较显著的。     

可食性包装膜的研究进展及其发展前景

本文从可食性膜的分类、特点、以及发展趋势等几个方面对可食性膜近几年来国内外研究进展进行了综述。从目前的现状来看,世界一些发达国家已投入了相当的人力、物力,对可食性膜的成膜特性及其性能进行了研究。     

可食用抗菌膜在食品包装领域的应用及研究进展

保鲜贮藏技术在延长易腐食品的保质期方面具有重要作用,随着消费者环保和安全意识的增强,可食用抗菌包装膜因具有天然、无毒的良好特性而逐渐受到青睐。本文详细介绍可食用抗菌膜的基材、制备方法与抗菌剂的种类,并总结可食用抗菌膜在食品包装领域的实际应用,同时阐述未来抗菌功能食品包装的发展趋势。以期为减少白色塑料污染并为对工农业产生的废物进行回收和开发利用提供参考,同时为食品保鲜贮藏提供科学依据和理论基础。     

膳食纤维及其在可食性包装中的应用

通过对膳食纤维的物化特性和生理功能的介绍,以及对可食性包装的简述,探讨膳食纤维在可食性包装方面的研究现状及前景。     

脂质-马铃薯淀粉基可食包装膜储藏性能研究

通过对脂质-马铃薯淀粉基可食膜在不同的储藏条件下储藏性能的研究,确定了适宜的储藏条件;将该膜应用于方便面调料的包装,通过对包装后的调料包在储藏过程中失重和油脂过氧化值的变化进行分析,进一步验证了脂质-马铃薯淀粉基可食膜具有优良的阻隔性能。     

可食性蛋白膜在食品包装中的应用研究进展

随着人们环保意识的增强和对食品的保藏品质和包装要求的提高,研发绿色天然的食品包装膜成为了焦点,其中无毒无害、环境友好的可食性蛋白膜已成为近几年的研究热点。本文概述了动物蛋白膜、植物蛋白膜、复合蛋白膜三种可食性蛋白膜的优缺点、制备方法和主要应用的食品领域,对近年来国内外有关可食性蛋白膜在食品包装中的应用研究的特点、作用和进展进行了梳理和总结,为后续可食性蛋白膜的应用研究和产业化发展提供了一定的参考。未来随着制备工艺的不断优化,可食性蛋白膜有望向着多功能、智能化的方向更好地发展。     

可食性包装膜的研究进展

可食性包装膜主要有多糖类可食性包装膜、蛋白质类可食性包装膜、微生物共聚聚酯可食性包装膜和多糖、蛋白质、脂肪酸复合型包装膜。     

蛋白质基可食性生物聚合膜的研究进展

可食性生物聚合膜的开发和应用是食品、药品和包装行业十分重视的课题。其中,蛋白膜以其营养丰富和隔油阻气等性能,成为国内外研究的热点。主要介绍以蛋白质为基质的可食性生物聚合膜的研究进展,并对其发展趋势提出观点。     

活性可食性膜在食品包装中的应用

讨论了活性可食性膜的主要成膜基质及其特性,可添加的活性物质,探讨了影响活性可食性膜性能的主要因素,提出了它在食品包装中的应用前景。     

魔芋葡甘聚糖/乙基纤维素复合膜配方优化及其在蜂蜜包装中的应用

研究了魔芋葡甘聚糖(KGM)和乙基纤维素(EC)复合膜最优配方,并探究KGM/EC膜在蜂蜜包装中的应用.以KGM、EC和癸二酸二丁酯(DBS)为基材,以水和乙酸乙酯作为溶剂制备KGM/EC膜,在单因素实验的基础上,采用Miscellaneous试验设计结合响应面分析法优化KGM/EC复合膜配方,结果表明,复合膜最佳配方...     

Fatty Acid Distribution and Its Effect on Oxygen Permeability in Laminated Edible Films

Lipid contents, distributed fatty acid concentrations and oxygen permeability of laminated methylcellulose/corn zein-fatty acid films and methylcellulose films separated from the laminate were investigated. Total lipid contents ranged from 0.056 to 0.157 g/cm³ for the laminated edible film structure, and distributed fatty acid contents ranged from 0.062 to 0.220 g/cm³ in the methylcellulose layer. Fatty acid distribution increased with chain length and fatty acid concentration. Oxygen permeabilities of both laminated methylcellulose/corn zein-fatty acid films and methylcellulose films separated from the laminate increased as chain length of fatty acid decreased and concentration of fatty acid increased. Scanning electron microscopy and Soxhlet extraction appeared to show distribution of fatty acids from the corn zein layer into and through the methylcellulose layer.     

Nanocomposite Edible Films from Mango Puree Reinforced with Cellulose Nanofibers

ABSTRACT:  Cellulose nanoreinforcements have been used to improve mechanical and barrier properties of biopolymers, whose performance is usually poor when compared to those of synthetic polymers. Nanocomposite edible films have been developed by adding cellulose nanofibers (CNF) in different concentrations (up to 36 g/100 g) as nanoreinforcement to mango puree based edible films. The effect of CNF was studied in terms of tensile properties, water vapor permeability, and glass transition temperature ( T _g) of the nanocomposite films. CNF were effective in increasing tensile strength, and its effect on Young's modulus was even more noticeable, especially at higher concentrations, suggesting the formation of a fibrillar network within the matrix. The addition of CNF was also effective to improve water vapor barrier of the films. Its influence on T _g was small but significant. The study demonstrated that the properties of mango puree edible films can be significantly improved through CNF reinforcement.     

可食性涂膜包装对鲜切马铃薯褐变抑制的研究

选用卡拉胶、壳聚糖、海藻酸钠为主要原料作为涂膜原料,对马铃薯进行涂膜处理。低温下冷藏,分别对马铃薯进行褐变度、色差值、多酚氧化酶活性及感官色泽测定。并与马铃薯护色剂处理作对照,以比较其褐变抑制效果。     

响应面法优化纳米SiOx/鸡蛋清蛋白可食性膜的琥珀酰化改性工艺

目的：以鸡蛋清蛋白为原料,制备纳米SiOx/鸡蛋清蛋白可食性膜,研究琥珀酰化改性工艺对膜性能的影响。方法：以琥珀酸酐添加量、反应时间、反应温度及反应pH值为影响因素,以拉伸强度、断裂伸长率、水蒸气透过系数及透油系数为响应值,采用单因素试验和响应面分析法,优化可食性膜的琥珀酰化改性工艺。结果：建立了回归模型,优化琥珀酰化改性工艺为琥珀酸酐添加量0.70 g、反应时间40.35 min、反应温度34.87 ℃、反应pH 8.30,在此条件下可食性膜拉伸强度、断裂伸长率、水蒸气透过系数及透油系数的预测值分别为4.935 MPa、75.446%、3.499 g·mm/（m2·d·kPa）、0.874 g·mm/（m2·d）,验证值为：（4.891±0.126）MPa、（73.560±4.329）%、（3.651±0.097）g·mm/（m2·d·kPa）、（0.914±0.008）g·mm/（m2·d）,与之接近,优化结果可靠。结论：琥珀酸酐添加量和反应pH值是影响膜性能的主要因素。     

Development of Soybean Protein-Isolate Edible Films Incorporated with Beeswax,Span 20, and Glycerol

Abstract: The effect of the beeswax, Span 20, and glycerol content on qualities of soybean-protein-isolate edible films was evaluated. Beeswax and Span 20 were selected to improve qualities of soybean-protein-isolate films from 11 emulsifiers. The content of beeswax, Span 20, and glycerol was further optimized by response surface analysis. The optimal composite emulsifier was beeswax (1.87% of soybean protein-isolate), Span 20 (10.25% of soybean protein-isolate), and glycerol (29.12% of soybean protein-isolate) with tensile strength of 908 MPa, percentage elongation at break of 25.8%, water vapor permeability of 19.2 g/m·d·MPa, and oxygen permeability of 0 cm³/m·d·MPa. The quality of soybean-protein-isolate films incorporated with the optimal composite emulsifier was 2.34 times higher than that of the control. Furthermore, the disulfide bond content of soybean-protein-isolate films showed a positive correlation with their quality, which provided a simple and rapid way to rank quality of soybean-protein-isolate films. Therefore, our result will not only give an instruction to soybean-protein-isolate-film production, but also give a simple and rapid way to rank film qualities. Practical Application: Our results give the optimal composite emulsifiers for the soybean-protein-isolate-film production. The soybean-protein-isolate films based on the optimal composite emulsifiers show their tensile strength of 908 MPa, percentage elongation at break of 25.8%, water vapor permeability of 19.2 g/m·d·MPa, and oxygen permeability of 0 cm³/m·d·MPa, being stronger than the control. Moreover, our results give a simple and rapid way to rank film qualities, because the disulfide bond content of soybean-protein-isolate films showed a positive correlation with their quality. Hence, the disulfide bond content was an indicator to rank qualities of soybean-protein-isolate films.