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以可得然胶为原料制备具有抑菌性能的可得然胶季铵盐,用傅里叶变换衰减全反射红外光谱(ATR-FTIR)和1HNMR表征可得然胶季铵盐的结构。采用反复冷冻-解冻-乳化交联的方法制备可得然胶季铵盐薄膜。并采用SEM、ATR-FTIR、TGA对膜的结构和性能进行表征与分析,考察了不同配方下的膜液稳定性和透水蒸气性能。结果表明:石蜡加量为0.4%~0.8%(以薄膜制备所用水质量计的百分数,下同)的膜液放置7 d后仍为不透明的乳白色液体且不分层,表明膜液具有一定的稳定性;当膜液的冷冻-解冻次数为3次,甘油加量为2.0%,石蜡加量为0.6%时,薄膜的水蒸气透过率为2.12×10~(-7)(mm·h·Pa)~(-1)。抑菌测试结果表明:可得然胶季铵盐薄膜对大肠杆菌、葡萄球菌和镰刀菌均具有抑制作用,对葡萄球菌和镰刀菌的抑制效果要强于对大肠杆菌的抑制效果。
The available quaternary ammonium salt of the available natural rubber with bacteriostasis was prepared from the available natural rubber, and the structure of the natural rubber quaternary ammonium salt was characterized by Fourier transform attenuated total reflection infrared spectroscopy (ATR-FTIR) and 1HNMR. Quaternary ammonium salt films were prepared by repeated freeze-thaw-emulsification cross-linking method. The structure and properties of the membranes were characterized and analyzed by SEM, ATR-FTIR and TGA. The stability of membrane liquid and water vapor permeability were investigated under different formulations. The results show that the paraffin dosage is 0.4% ~ 0.8% (the percentage of the mass of water used in the preparation of the film, the same below) after 7 days of storage is still opaque milky white liquid and does not stratify, indicating that the membrane fluid has a certain The water vapor transmission rate of the film was 2.12 × 10 -7 (mm · h) when the freeze-thaw times of the membrane liquid were 3 times, the amount of glycerol was 2.0% and the amount of paraffin was 0.6% · Pa) ~ (-1). The antibacterial test results showed that the available natural rubber quaternary ammonium salt film on Escherichia coli, Staphylococcus aureus and Fusarium were inhibited, Staphylococcus aureus and Fusarium inhibitory effect is stronger than that of Escherichia coli.