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Biodegradable Layered Double Hydroxide/Polymer Films for Efficient Oxygen and Water Vapor Barriers
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2022-01-12 , DOI: 10.1021/acs.iecr.1c04069 Zeya Yang 1 , Kaiqiang Shi 1 , Zuchao Jin 1 , Ziru Liu 1 , Yong Li 1, 2 , Yongwang Huang 2 , Feng Gao 2 , Jingbin Han 1
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2022-01-12 , DOI: 10.1021/acs.iecr.1c04069 Zeya Yang 1 , Kaiqiang Shi 1 , Zuchao Jin 1 , Ziru Liu 1 , Yong Li 1, 2 , Yongwang Huang 2 , Feng Gao 2 , Jingbin Han 1
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Two-dimensional (2D) materials with platelet-like morphology have emerged as nano-building blocks to construct high-barrier films. In this work, hybrid biodegradable films with simultaneous oxygen and water vapor barrier performance were fabricated by a scraping method, which were composed of polylactic acid (PLA) and MgAl-layered double hydroxide (LDH) nanoplatelets modified by 3-aminopropyltriethoxysilane (APTES) (APTES@LDH). The oxygen transmission rates of APTES@LDH(5%)/PLA and APTES@LDH(10%)/PLA hybrid films are lower than the testing limit of an instrument (<0.005 cm3/(m2·24 h·0.1 MPa)). The water vapor transmission rate of the APTES@LDH(10%)/PLA hybrid film is only 0.026 g/(m2·24 h·0.1 MPa), 94.1% lower than that of the pure PLA film. In addition, the hybrid films can be hydrolyzed by protease K in a Tris-HCl buffer system, losing its 30% weight after 7 days, which means such films are biodegradable. Their excellent gas barrier performance is mainly based on the tortuous effect of 2D LDH nanoplatelets. In addition, hydrogen bonds form between the incoming water molecules and hydroxyl groups of LDH, which further inhibits the transmission of water vapor. The enhancement of mechanical strength of the hybrid films compared with pure PLA is also proved. Taking advantage of these advanced properties, the hybrid films have potential application prospects in the fields of biodegradable packaging for foods, pharmaceuticals, and electronic devices.
中文翻译：
用于高效氧气和水蒸气屏障的可生物降解层状双氢氧化物/聚合物薄膜
具有片状形态的二维 (2D) 材料已成为构建高阻隔薄膜的纳米构件。在这项工作中，通过刮擦法制备了具有同时阻氧和水蒸气阻隔性能的混合生物降解薄膜，该薄膜由聚乳酸（PLA）和 3-氨基丙基三乙氧基硅烷（APTES）改性的 MgAl 层状双氢氧化物（LDH）纳米片组成。 APTES@LDH)。APTES@LDH(5%)/PLA和APTES@LDH(10%)/PLA杂化膜的透氧率低于仪器检测极限(<0.005 cm 3 /(m 2 ·24 h·0.1 MPa ) ））。APTES@LDH(10%)/PLA杂化膜的水蒸气透过率仅为0.026 g/(m 2·24 h·0.1 MPa)，比纯PLA薄膜低94.1%。此外，杂化薄膜可以在 Tris-HCl 缓冲系统中被蛋白酶 K 水解，7 天后重量减少 30%，这意味着这种薄膜是可生物降解的。它们优异的阻气性能主要是基于二维LDH纳米片的曲折效应。此外，进入的水分子与LDH的羟基之间形成氢键，进一步抑制了水蒸气的传输。与纯PLA相比，杂化薄膜的机械强度也得到了提高。利用这些先进性能，混合薄膜在食品、药品和电子设备的可生物降解包装领域具有潜在的应用前景。
更新日期：2022-01-26
中文翻译：
用于高效氧气和水蒸气屏障的可生物降解层状双氢氧化物/聚合物薄膜
具有片状形态的二维 (2D) 材料已成为构建高阻隔薄膜的纳米构件。在这项工作中，通过刮擦法制备了具有同时阻氧和水蒸气阻隔性能的混合生物降解薄膜，该薄膜由聚乳酸（PLA）和 3-氨基丙基三乙氧基硅烷（APTES）改性的 MgAl 层状双氢氧化物（LDH）纳米片组成。 APTES@LDH)。APTES@LDH(5%)/PLA和APTES@LDH(10%)/PLA杂化膜的透氧率低于仪器检测极限(<0.005 cm 3 /(m 2 ·24 h·0.1 MPa ) ））。APTES@LDH(10%)/PLA杂化膜的水蒸气透过率仅为0.026 g/(m 2·24 h·0.1 MPa)，比纯PLA薄膜低94.1%。此外，杂化薄膜可以在 Tris-HCl 缓冲系统中被蛋白酶 K 水解，7 天后重量减少 30%，这意味着这种薄膜是可生物降解的。它们优异的阻气性能主要是基于二维LDH纳米片的曲折效应。此外，进入的水分子与LDH的羟基之间形成氢键，进一步抑制了水蒸气的传输。与纯PLA相比，杂化薄膜的机械强度也得到了提高。利用这些先进性能，混合薄膜在食品、药品和电子设备的可生物降解包装领域具有潜在的应用前景。
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