ZnO Deposited on Natural Rubber Films by Different Coating Methods

Materials Science Forum Pub Date : 2024-07-18 DOI:10.4028/p-owd6ws

Noottiyaporn Suwantrakit, P. Sujaridworakun, O. Boondamnoen

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Abstract

This study was focused on the incorporation of ZnO on natural rubber (NR) films using acrylic as a binder. Firstly, the dispersion of ZnO was prepared by dispersing ZnO into a mixture of acrylic emulsion and sodium cocoyl isethionate (SCI). The concentrations of acrylic emulsion were observed at 0.1 % and 0.5 %w/v while the ratio of ZnO:SCI was fixed at 1:0.25. The result shows higher concentration of acrylic emulsion could provide higher dispersion stability compared to the lower concentration. Subsequently, NR films were coated with ZnO through two-pot and one-pot methods. It was found that the surface of NR film from two-pot method (2P_film) presented uneven distribution of the ZnO while plate structure of ZnO and acrylic were observed on films surfaces one-pot method (1P0.1_film and 1P0.5_film). The Zn content on 2P_film surfaces observed by EDS was found at 14 % while 1P0.1_film and 1P0.5_film contain at 28 % and 19 %, respectively, due to higher concentration acrylic emulsion results a greater polymer network anchoring on the ZnO. The reductions of antibacterial of 2P_film, 1P0.1_film and 1P0.5_film are similar results at over 99%. It reveals that the low content of ZnO could sufficiently achieve an excellent antibacterial performance. Nevertheless, the lower concentration of ZnO/Acrylic will be conducted in further study.

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用不同镀膜方法在天然橡胶薄膜上沉积氧化锌

本研究的重点是以丙烯酸为粘合剂在天然橡胶（NR）薄膜上掺入氧化锌。首先，将氧化锌分散到丙烯酸乳液和椰油酰异硫酸钠（SCI）的混合物中，制备氧化锌分散液。丙烯酸乳液的浓度分别为 0.1 % 和 0.5 %w/v，而氧化锌与 SCI 的比例固定为 1:0.25。结果表明，与低浓度相比，高浓度的丙烯酸乳液具有更高的分散稳定性。随后，通过二锅法和一锅法将氧化锌涂覆在 NR 薄膜上。结果发现，双锅法制备的 NR 薄膜（2P_film）表面 ZnO 分布不均匀，而单锅法制备的薄膜（1P0.1_film 和 1P0.5_film）表面 ZnO 和丙烯酸呈板状结构。通过 EDS 观察发现，2P_薄膜表面的 Zn 含量为 14%，而 1P0.1_film 和 1P0.5_film 的 Zn 含量分别为 28% 和 19%，这是因为丙烯酸乳液的浓度较高，导致 ZnO 上的聚合物网络锚定较大。2P_film 、1P0.1_film 和 1P0.5_film 的抗菌率降低幅度相似，都超过 99%。这表明，低浓度的氧化锌足以实现优异的抗菌性能。不过，我们还将进一步研究更低浓度的 ZnO/丙烯酸。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Materials Science Forum

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