Pressure sensitive adhesives for quantifying microplastic isolation
Pressure sensitive adhesives for quantifying microplastic isolation
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DOI：
10.1016/j.seppur.2022.122819
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发表时间：
2023-02
影响因子：
8.6
通讯作者：
Julie M. Rieland;Zeyuan Hu;Julian S. Deese;B. Love
中科院分区：
文献类型：
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作者：
Julie M. Rieland;Zeyuan Hu;Julian S. Deese;B. Love
微塑料是一个日益受到关注的环境问题，大量证据记录了塑料材料在几乎所有环境分区中的分布。有助于结合、聚合或合并这些集合的对策可能会降低人类和动物的暴露程度。压敏粘合剂 (PSA) 已被确定为一种可行的微塑料 (MP) 捕获机制，具有一系列潜在的使用条件。与任何对策一样，需要在收集效率、成本、安装简易性、稳健性等方面评估潜在的解决方案。在我们之前的工作基础上，对喷涂的 PSA 作为浸没表面进行了研究，用于快速、低成本的定量方法来评估水介质中 MP 的结合。将含有两种不同分子量的聚（丙烯酸 2-乙基己酯）PSA（92k 和 950k）的树脂以及两种树脂重量比为 50:50 的混合物用作喷涂基材，以比较树脂组合物对 MP 粘合剂粘合的影响。使用商用气刷将 PSA 薄膜（92 k 6 ± 1 μm、950 k 4 ± 2 μm、50:50 BD 6.5 ± 1 μm）喷涂在硼硅酸盐载玻片上。将直径尺寸从 15 到 30 µm 不等的多分散尼龙 12 颗粒以 0.01 到 5 mg mL−1 的浓度分散在水中，并在环境条件下搅拌，以评估粘合剂结合力，作为微粒捕获的定量比较。还进行了混合测定，比较了常见 MP 种类的结合，包括聚乙烯 (50、200 µm)、聚苯乙烯 (10 µm) 和聚酯纤维 (1000 µm)，以了解不同的成分、尺寸和形状因素如何影响吸附。载玻片方法显示，随着粘合剂暴露时间和 MP 浓度的增加，颗粒结合的线性趋势增加。粘合剂对颗粒的润湿性表明了边界参数，在该参数下，较软的粘合剂在 MP 捕获方面表现出色，但可能会损害粘合剂膜的完整性。粘合剂测试方法成本低、样品制备方便且占地面积小，这表明其在资源贫乏地区和现场工作中的研究应用前景广阔。
Microplastics are a growing environmental concern, with a large body of evidence documenting distribution of plastic material in virtually all environmental compartments. Countermeasures that help to bind, aggregate, or coalesce these collections might result in lower human and animal exposures. Pressure sensitive adhesives (PSAs) have been identified as a viable microplastic (MP) capture mechanism with a range of potential use conditions. As with any countermeasure, there is a need to evaluate potential solutions in terms of collection efficiency, cost, ease of installation, robustness etc. Expanding on our previous work, spray-coated PSAs were investigated as submerged surfaces for use in a quick and low-cost quantitative method to assess MP binding in aqueous mediums. Resins containing two differing molecular weights of poly(2-ethylhexyl acrylate) PSA (92 k and 950 k), and a 50:50 by weight mixture of the two resins were applied as spray-coated substrates to compare the effect of resin composition on MP-adhesive binding. Thin films of PSA (92 k 6 ± 1 μm, 950 k 4 ± 2 μm, 50:50 BD 6.5 ± 1 μm) were sprayed on borosilicate glass slides using a commercial air brush. Polydisperse nylon-12 particles varying in size from 15 to 30 µm in diameter were dispersed in water at concentrations between 0.01 and 5 mg mL−1and agitated under ambient conditions to assess adhesive binding as quantitative comparisons of microparticle capture. Mixed assays were also performed comparing binding of common MP species including polyethylene (50, 200 µm), polystyrene (10 µm), and polyester fibers (1000 µm) to understand how varying composition, size, and form factor affect adsorption. The glass slide method showed increasing linear trends of particle binding with increased adhesive exposure time and MP concentration. The adhesive wettability to particles demonstrates bounding parameters under which softer adhesives excel at MP capture but may compromise adhesive film integrity. Low cost, ease of sample preparation, and small footprint of the adhesive testing method suggest promise for research use in under-resourced regions and field work.