抑制水中藻类生物包装材料的制备及性能表征

Preparation and Characterization of Algae⁃Resistant Biological Packaging Materials

以山梨酸钾(PS)、氟酸(FA)和盐粉作为抑菌剂,聚甘油酯(PGE)为分散剂,对基材聚丙烯(PP)树脂进行改性,通过不同比例的抑菌剂与基料经共混熔融、造粒流延等工艺制备了憎藻薄膜。对憎藻薄膜的力学、光学、透气、透湿、疏水和耐水等性能指标进行了测试,并通过微生物菌落总数的测定考察憎藻薄膜对藻类微生物的抑制效果。结果表明,添加4%的山梨酸钾后憎藻薄膜横纵向拉伸强度均达到最大值,分别是(21.44±1.63)、(32.03±1.26)MPa;随着抑菌剂浓度的增加,憎藻薄膜的光学性能、透气率和透湿率下降,疏水性能提高;微生物菌落总数的测定结果表明山梨酸钾和FA均可抑制藻类微生物的生长,且随着抑菌剂添加量的增加,抑菌效果越明显,表现出了良好的防污性和抗菌性。

A series of anti‑algal polypropylene films were prepared by melt blending and granulation flow using potassium sorbate(PS),fluoride acid(FA)and salt as bacteriostatic agents,and polyester glycerin as a dispersant.The mechanical and optical performance,permeability,moisture permeability,and hydrophobic and water‑resistant properties of the films were evaluated,and their algal microbial inhibition effect was investigated through the determination of the total number of microbial colonies.The results indicated that the film containing 4 wt%PS achieved optimal transverse and longitudinal tensile strength of(21.44±1.63)and(32.03±1.26)MPa,respectively.The optical properties,air permeability and moisture permeability of the films decreased with an increase in the concentration of bacteriostatic agent,but their hydrophobic properties increased.Both PS and FA can inhibit the growth of algae microorganisms.Such an antibacterial effect becomes more significant with an increase in the concentration of antibacterial agent.The films exhibit good antifouling and antibacterial properties.