journal article Jul 12, 2021

Precisely controlled delivery of plant hormone using poly(vinyl alcohol)/zeolite A hydrofilm composite

Polymer Engineering & Science Vol. 61 No. 8 pp. 2172-2182 · Wiley
View at Publisher Save 10.1002/pen.25744
Abstract
AbstractProgrammable 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.
Topics

No keywords indexed for this article. Browse by subject →

References
54
[2]
Hartmann H. T. (1993)
[6]
Material Safety Data Sheet 1‐NAA MSDS http://www.dcfinechemicals.com(2021).
[7]
Environmental Protection Agency EPA–HQ–OPP–2012–0203;FRL–9386–1 Federal Register EPA 2013 p30213.
[8]
United States Environmental Protection Agency.EPA 738‐R‐07‐07017; E. R. E. D. (RED) 2007.
[14]
Viboonratanasr D. A zeolite hydrofilm composite (ZHF) with high water absorbency for controlled release 1‐Naphthaleneacetic acid (NAA) (2017)
[42]
Database of Zeolite Structures http://www.iza-structure.org/databases(2021).

Showing 50 of 54 references

Related

You May Also Like