PBAT微孔膜/汉麻水刺非织造布复合功能膜的制备及防水透湿性能
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天津工业大学

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国家自然科学基金资助项目(11802205),天津市非织造布技术工程中心(天津工业大学)开放课题(KF202105)


Preparation and waterproof and moisture permeability of PBAT microporous membrane / hemp spunlaced nonwovens composite functional membrane
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    摘要:

    为开发具有一定防水透湿功能的绿色环保可降解医用防护材料,制备了聚己二酸/对苯二甲酸丁二醇酯(PBAT)微孔膜/汉麻水刺非织造布复合膜。首先,采用水刺工艺将汉麻、棉纤维混合制备非织造布,然后利用非溶剂致相分离法在汉麻/棉水刺非织造材料上制备PBAT微孔膜。对不同铸膜液浓度、不同预蒸发时间、不同膜厚度微孔膜/水刺非织造布复合膜的平均孔径进行单因素实验,并通过响应曲面试验优化了复合膜的最优工艺。探究了覆膜前后材料的力学性能、孔径、接触角、耐静水压、透湿性能并进行对比分析。结果表明:PBAT微孔膜最佳制备工艺条件如下所示,铸膜液浓度为14.34 %、预蒸发时间为44.63 s、膜厚度为0.16 mm。使用最优工艺制备的复合膜力学性能与耐静水压均大于水刺非织造材料,孔径和透湿量均小于水刺非织造材料,接触角略小于水刺非织造材料。

    Abstract:

    In order to develop environmental and degradable medical protective materials with the functionality of waterproof and moisture permeability, Poly (butyleneadipate-co-terephthalate) (PBAT) microporous membrane/hemp spunlaced nonwoven composite material was prepared. Firstly, hemp and cotton fibers were mixed and then spunlaced to prepare nonwovens. The PBAT microporous membrane was prepared on hemp/cotton spunlaced nonwovens via nonsolvent induce phase separation method. Single factor experiments were used to preliminarily explore the average pore size of microporous membrane/spunlaced nonwoven composite material with different casting solution concentration, pre-evaporation time and membrane thickness. Next, the optimal process of composite membrane was optimized by response surface methodology. The mechanical properties, pore diameter, contact angle, hydrostatic pressure resistance and moisture permeability of the materials before and after coating were compared and analyzed. The results show that the optimum preparation conditions of PBAT microporous membrane are as follows. The concentration of casting solution is 14.34%, the pre-evaporation time is 44.63 s and the membrane thickness is 0.16 mm. The mechanical property and hydrostatic pressure resistance of the composite material with the optimal process are larger than those of spunlaced nonwovens, the pore diameter and moisture permeability are smaller than those of nonwovens. The contact angle is slightly smaller than that of nonwovens.

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  • 收稿日期:2021-11-05
  • 最后修改日期:2022-01-11
  • 录用日期:2022-03-27
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