Treatment of N-t-butylbenzenesulfonamide with an excess of BuLi, followed by the reaction with methyl 2-（4-methylphenyl）propanoate, gave the corresponding 2-carboxybenzenesulfonamide, which underwent a sequence of c...Treatment of N-t-butylbenzenesulfonamide with an excess of BuLi, followed by the reaction with methyl 2-（4-methylphenyl）propanoate, gave the corresponding 2-carboxybenzenesulfonamide, which underwent a sequence of consecutive N-deprotective cyclization process mediated by TMSCI-NaI-MeCN reagent to afford the N-sulfonylimine. Following the bromination and ring expansion, 3-methyl-3-（4-methylphenyl）-2H-benzo[e][1,2]thiazine-l,l,4-trione was obtained. Optical resolution of the racemic benzosultam using （-）-menthoxyacetyl chloride, furnished the optically p.ure （＋）- and （-）-3-methyl-3-（4-methylphenyl）-2H- benzo[e][1,2]thiazine-1,1,4-triones, which were fluorinated with FC103 to produce the corresponding chiral N-F agents.展开更多
目的]制备一种新型羧甲基纤维素(CMC)/丙烯酸酯无氟防油剂,将其应用于食品包装中。[方法]以CMC、甲基丙烯酸甲酯(MMA)、丙烯酸丁酯(BA)和甲基丙烯酸(MAA)为原料,通过单因素试验优化防油剂的制备工艺,采用傅里叶红外光谱(FTIR)、纳米粒度...目的]制备一种新型羧甲基纤维素(CMC)/丙烯酸酯无氟防油剂,将其应用于食品包装中。[方法]以CMC、甲基丙烯酸甲酯(MMA)、丙烯酸丁酯(BA)和甲基丙烯酸(MAA)为原料,通过单因素试验优化防油剂的制备工艺,采用傅里叶红外光谱(FTIR)、纳米粒度及Zeta电位分析仪、扫描电镜(SEM)分析防油剂的化学结构、粒径、电荷和成膜性能。采用动态油接触角和防油等级来评价食品包装纸的防油性能。[结果]在最优工艺(m_(MMA)∶m_(BA)=4∶6、APS用量为2.5%、SDS用量为10.0%、CMC用量为8.0%、MAA用量为4.0%)下,防油剂平均粒径为66.64 nm、Zeta电位为-21.91 m V,具有良好的成膜性能。当涂布量为6.0 g/m^(2)时,制备的食品包装纸的防油等级可达最高(12.0级),食品包装纸具有良好的可回收性能,纤维回收率可达94.7%。[结论]CMC/丙烯酸酯防油剂是一种防油性能良好的无氟防油剂,在食品包装纸中有广阔的应用前景。展开更多
基金the Scientific Research Foundation for the Returned Oversea Chinese Scholars of Shandong University.
文摘Treatment of N-t-butylbenzenesulfonamide with an excess of BuLi, followed by the reaction with methyl 2-（4-methylphenyl）propanoate, gave the corresponding 2-carboxybenzenesulfonamide, which underwent a sequence of consecutive N-deprotective cyclization process mediated by TMSCI-NaI-MeCN reagent to afford the N-sulfonylimine. Following the bromination and ring expansion, 3-methyl-3-（4-methylphenyl）-2H-benzo[e][1,2]thiazine-l,l,4-trione was obtained. Optical resolution of the racemic benzosultam using （-）-menthoxyacetyl chloride, furnished the optically p.ure （＋）- and （-）-3-methyl-3-（4-methylphenyl）-2H- benzo[e][1,2]thiazine-1,1,4-triones, which were fluorinated with FC103 to produce the corresponding chiral N-F agents.
文摘目的]制备一种新型羧甲基纤维素(CMC)/丙烯酸酯无氟防油剂,将其应用于食品包装中。[方法]以CMC、甲基丙烯酸甲酯(MMA)、丙烯酸丁酯(BA)和甲基丙烯酸(MAA)为原料,通过单因素试验优化防油剂的制备工艺,采用傅里叶红外光谱(FTIR)、纳米粒度及Zeta电位分析仪、扫描电镜(SEM)分析防油剂的化学结构、粒径、电荷和成膜性能。采用动态油接触角和防油等级来评价食品包装纸的防油性能。[结果]在最优工艺(m_(MMA)∶m_(BA)=4∶6、APS用量为2.5%、SDS用量为10.0%、CMC用量为8.0%、MAA用量为4.0%)下,防油剂平均粒径为66.64 nm、Zeta电位为-21.91 m V,具有良好的成膜性能。当涂布量为6.0 g/m^(2)时,制备的食品包装纸的防油等级可达最高(12.0级),食品包装纸具有良好的可回收性能,纤维回收率可达94.7%。[结论]CMC/丙烯酸酯防油剂是一种防油性能良好的无氟防油剂,在食品包装纸中有广阔的应用前景。
