In order to solve the problem that the water vapor barrier performance of the existing flexible polymer composite membrane is low,and it is difficult to optimize the water vapor transmission,mechanical strength and optical transmission at the same time,a new magnesium oxide heterocyclic olefin copolymer composite membrane(MgO/COC)was developed in this paper.The effects of MgO content on the mechanical properties,thermal properties,hydrophobic properties and water vapor barrier properties of the composite membrane were explored.The results show that MgO has good dispersion in COC composite film.When 1 wt％MgO was doped with COC,the contact angle reached the highest of 106.8°,indicating good hydrophobic properties of the MgO/COC composite film.The water vapor barrier performance of the composite membrane is 63.1％higher than that of the pure COC membrane,and the minimum water vapor transmission rate reaches 0.21 g/(m2·d),which is the lowest water vapor transmission rate of the doped polymer composite membrane publicly reported at present.The excellent water vapor barrier performance is attributed to the reaction between MgO and water vapor to form magnesium hydroxide,and magnesium hydroxide has excellent water vapor barrier performance.The double mechanism water vapor barrier property of the composite film provides a new idea for the water va-por barrier design of food packaging and pharmaceutical packaging.
关键词
水汽阻隔/COC/氧化镁/复合膜/反应型
Key words
water vapor barrier/COC/magnesium oxide/composite membrane/reactive type
维普
万方数据