Low density polyethylene(LDPE)/lignin blends were prepared using melt blending.Two kinds of compatibilizers, ethylene-vinylacetate(EVA) which is softer than LDPE and polyethylene grafted with maleic anhydride(PE-g-MA)...Low density polyethylene(LDPE)/lignin blends were prepared using melt blending.Two kinds of compatibilizers, ethylene-vinylacetate(EVA) which is softer than LDPE and polyethylene grafted with maleic anhydride(PE-g-MA) which is harder than LDPE were used to improve the interfacial adhesion.Scanning electron microscope(SEM) was used to investigate the dispersion of lignin in LDPE matrix.The results showed that both of the compatibilizers could improve the interaction between the low density polyethylene and l...展开更多
Low density polyethylene film surface-grafted phenolic resole was prepared by a sequential processes. Firstly, acrylic acid was grafted to the surface of low density polyethylene by photo-grafting. Secondly, the carbo...Low density polyethylene film surface-grafted phenolic resole was prepared by a sequential processes. Firstly, acrylic acid was grafted to the surface of low density polyethylene by photo-grafting. Secondly, the carboxylic groups in poly（acrylic acid） chains were transferred to sulfonic groups by the reaction of carboxylic groups with sulfanilic acid. Finally, a thin layer of phenolic resole was cured onto the surface of low density polyethylene. The grafting process was characterized by FTIR-ATR and gravimetric analysis. A possible model was proposed to interpret the experimental results.展开更多
为比较不同厚度的低密度聚乙烯(LDPE)膜对平菇保鲜效果的影响,分别以0.015mm、0.030mm和0.045 mm 3种不同厚度的LDPE膜为包装材料,在模拟超市冷鲜货架温湿度条件(温度约14±1℃,贮藏环境相对湿度约85%)下,探讨了不同厚度LDPE膜对平...为比较不同厚度的低密度聚乙烯(LDPE)膜对平菇保鲜效果的影响,分别以0.015mm、0.030mm和0.045 mm 3种不同厚度的LDPE膜为包装材料,在模拟超市冷鲜货架温湿度条件(温度约14±1℃,贮藏环境相对湿度约85%)下,探讨了不同厚度LDPE膜对平菇保鲜效果的影响。结果表明:与0.015mm膜和0.030mm膜相比,0.045 mm LDPE膜虽能显著提高平菇的失重率,保持包装内的较高的CO2体积分数和较低O2的体积分数(P<0.05);但在贮藏的第4天后,0.045mm LDPE膜对抑制平菇呼吸强度、维持细胞膜透性,提高平菇感官分值的效果显著低于0.030mm LDPE膜(P<0.05)。3种不同厚度的保鲜膜以0.030mm LDPE膜对平菇的保鲜效果最佳。展开更多
基金supported by the National Natural Science Foundation of China(Nos.50533050,20634050)
文摘Low density polyethylene(LDPE)/lignin blends were prepared using melt blending.Two kinds of compatibilizers, ethylene-vinylacetate(EVA) which is softer than LDPE and polyethylene grafted with maleic anhydride(PE-g-MA) which is harder than LDPE were used to improve the interfacial adhesion.Scanning electron microscope(SEM) was used to investigate the dispersion of lignin in LDPE matrix.The results showed that both of the compatibilizers could improve the interaction between the low density polyethylene and l...
文摘Low density polyethylene film surface-grafted phenolic resole was prepared by a sequential processes. Firstly, acrylic acid was grafted to the surface of low density polyethylene by photo-grafting. Secondly, the carboxylic groups in poly（acrylic acid） chains were transferred to sulfonic groups by the reaction of carboxylic groups with sulfanilic acid. Finally, a thin layer of phenolic resole was cured onto the surface of low density polyethylene. The grafting process was characterized by FTIR-ATR and gravimetric analysis. A possible model was proposed to interpret the experimental results.
文摘为比较不同厚度的低密度聚乙烯(LDPE)膜对平菇保鲜效果的影响,分别以0.015mm、0.030mm和0.045 mm 3种不同厚度的LDPE膜为包装材料,在模拟超市冷鲜货架温湿度条件(温度约14±1℃,贮藏环境相对湿度约85%)下,探讨了不同厚度LDPE膜对平菇保鲜效果的影响。结果表明:与0.015mm膜和0.030mm膜相比,0.045 mm LDPE膜虽能显著提高平菇的失重率,保持包装内的较高的CO2体积分数和较低O2的体积分数(P<0.05);但在贮藏的第4天后,0.045mm LDPE膜对抑制平菇呼吸强度、维持细胞膜透性,提高平菇感官分值的效果显著低于0.030mm LDPE膜(P<0.05)。3种不同厚度的保鲜膜以0.030mm LDPE膜对平菇的保鲜效果最佳。
