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老化对农用薄膜光学、机械和热性能的影响。

Influence of Ageing on Optical, Mechanical, and Thermal Properties of Agricultural Films.

作者信息

Rujnić Havstad Maja, Tucman Ines, Katančić Zvonimir, Pilipović Ana

机构信息

University of Zagreb Faculty of Mechanical Engineering and Naval Architecture, Ivana Lučića 5, 10000 Zagreb, Croatia.

University of Zagreb Faculty of Chemical Engineering and Technology, Trg Marka Marulića 19, 10000 Zagreb, Croatia.

出版信息

Polymers (Basel). 2023 Sep 4;15(17):3638. doi: 10.3390/polym15173638.

DOI:10.3390/polym15173638
PMID:37688264
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10489779/
Abstract

Plastic films utilized as greenhouse coverings play a vital role in safeguarding plantations from diverse weather conditions like sunlight, rain, hail, and wind. It is essential for these films to preserve their properties even after extended exposure to sunlight and water, while also maintaining transparency to support the unhindered growth of plants. The purpose of the study was to compare the properties of three types of plastic films: low density polyethylene diffuse film, low density polyethylene clear film, and ethylene tetrafluoroethylene film, before and after their ageing in weather test chamber with xenon-arc light in the presence of moisture. Two distinct types of PE films were chosen based on their suitability for specific regions in Croatia, whereas ETFE film was chosen as a potential new material that is gaining popularity across various industries, including agriculture. The properties investigated were tensile properties, transmittance by spectral analysis, and viscoelastic properties by dynamic mechanical analysis. Also, untreated films and the ones exposed to artificial ageing were compared by means of Fourier-transform infrared spectroscopy, differential scanning calorimetry and thermogravimetric analysis. The administered tests revealed a certain level of property degradation due to ageing in all three films. However, none of the films showed a substantial level of deterioration, indicating their suitability as greenhouse coverings.

摘要

用作温室覆盖物的塑料薄膜在保护种植园免受阳光、雨水、冰雹和风等各种天气条件影响方面发挥着至关重要的作用。即使在长时间暴露于阳光和水之后，这些薄膜仍能保持其性能，同时保持透明度以支持植物不受阻碍地生长，这一点至关重要。本研究的目的是比较三种塑料薄膜：低密度聚乙烯漫射膜、低密度聚乙烯透明膜和乙烯四氟乙烯膜，在含有氙弧灯且有水分的气候试验箱中老化前后的性能。基于它们对克罗地亚特定地区的适用性选择了两种不同类型的聚乙烯薄膜，而乙烯四氟乙烯膜则作为一种在包括农业在内的各个行业中越来越受欢迎的潜在新材料被选中。所研究的性能包括拉伸性能、光谱分析的透过率以及动态力学分析的粘弹性性能。此外，通过傅里叶变换红外光谱、差示扫描量热法和热重分析对未处理的薄膜和经过人工老化的薄膜进行了比较。所进行的测试表明，由于老化，所有三种薄膜都出现了一定程度的性能下降。然而，没有一种薄膜显示出严重的劣化，表明它们适合用作温室覆盖物。

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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d40f/10489779/75636f6afe1a/polymers-15-03638-g017.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d40f/10489779/98fa4dc33f08/polymers-15-03638-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d40f/10489779/8fdf24c4a1f5/polymers-15-03638-g011.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d40f/10489779/90140948e2ac/polymers-15-03638-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d40f/10489779/0c5cf5ae605d/polymers-15-03638-g002.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d40f/10489779/70ed2e730fdc/polymers-15-03638-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d40f/10489779/1a395b8cb39c/polymers-15-03638-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d40f/10489779/2c3bbd377e49/polymers-15-03638-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d40f/10489779/d7cd767eda29/polymers-15-03638-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d40f/10489779/678414b1ec77/polymers-15-03638-g012.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d40f/10489779/c832427be3ef/polymers-15-03638-g013.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d40f/10489779/2dbdb7329d85/polymers-15-03638-g014.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d40f/10489779/cdeb7dad37fd/polymers-15-03638-g015.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d40f/10489779/6bfbcedf9cd9/polymers-15-03638-g016.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d40f/10489779/75636f6afe1a/polymers-15-03638-g017.jpg

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