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Precisely controlled delivery of plant hormone using poly(vinyl alcohol)/zeolite A hydrofilm composite
Polymer Engineering and Science ( IF 3.2 ) Pub Date : 2021-07-12 , DOI: 10.1002/pen.25744
Duangkamon Viboonratanasri 1 , Paptawan Thongdee 2 , Malee Prajuabsuk 2 , Pornpan Pungpo 2 , Lapporn Vayachuta 1 , Panida Prompinit 1
Affiliation  

Programmable release of a plant hormone, 1-naphthylacetic acid (NAA), could be achieved by using a novel zeolite–hydrofilm (ZHF) composite. The ZHF was prepared using poly(vinyl alcohol) and glutaraldehyde as a cross-linking agent with the addition of different amounts of zeolite A (0, 1.5, 2.0, 2.5, and 3.0 wt%). This reveals that ZHF was formed as a phase-separated microcomposite with chemical interactions between zeolite A and polymer matrix. We found that the composite film with 2.5 wt% zeolite A had the largest pore size, which exhibited the highest water absorbency and the longest water retention time of over 7 h with high thermal and mechanical stabilities. Release profile displayed rapid desorption of NAA from the film at the initial stage, followed by sustained release thereafter. This behavior was explained by the Korsmeyer–Peppas model with a predominant mechanism of simple Fickian diffusion. Additionally, ZHF with NAA could effectively enhance adventitious root formation of Ocimum basilicum Linn. (sweet basil) cuttings due to accurate releasing NAA and time duration for releasing plant hormone. Finally, the NAA released at the film surface could be in a controlled manner with less negative impact on plant and environment.

中文翻译:

使用聚乙烯醇/沸石 A 水膜复合材料精确控制植物激素的传递

通过使用新型沸石-水膜 (ZHF) 复合材料,可以实现植物激素 1-萘乙酸 (NAA) 的可编程释放。ZHF 是使用聚乙烯醇和戊二醛作为交联剂,加入不同量的沸石 A(0、1.5、2.0、2.5 和 3.0 wt%)制备的。这表明 ZHF 是作为相分离的微复合材料形成的,沸石 A 和聚合物基质之间存在化学相互作用。我们发现含有 2.5 wt% 沸石 A 的复合膜具有最大的孔径,表现出最高的吸水率和最长的保水时间超过 7 小时,具有较高的热稳定性和机械稳定性。释放曲线显示 NAA 在初始阶段从薄膜中快速解吸,然后持续释放。这种行为由 Korsmeyer-Peppas 模型解释,其主要机制是简单的 Fickian 扩散。此外,含有 NAA 的 ZHF 可以有效促进不定根的形成。Ocimum basilicum Linn。(甜罗勒)扦插由于准确释放 NAA 和释放植物激素的持续时间。最后,在薄膜表面释放的 NAA 可以以可控的方式释放,对植物和环境的负面影响较小。
更新日期:2021-08-05
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