Abstract
Diffraction gratings are recorded in a holographic photopolymer containing nematic liquid crystal and peppermint oil. The presence of the oil modifies the polymerization and the holographic response. The composite containing oil adulterated with triethyl citrate obtains a diffraction efficiency related to the oil’s purity. The results obtained suggest the possibility of developing a holographic chemical analysis method for quality control of raw materials.
Highlights
Essential oils are known as volatile oils, ethereal oils, or as the oil of the plant from which they were extracted, such as the peppermint oil that we have been working on in our research
Compatibility of Peppermint Oil with the holographic polymer-dispersed liquid crystals (HPDLC) Samples exposed to the holographic recording were analyzed by scanning elec7torfo1n2 microscopy (SEM) to check that the introduction of peppermint oil in the photopolymer formulation does not affect the diffraction grating formation
Incorporating peppermint essential oil into an HPDLC photopolymer yields a composite material that can be used as a holographic recording material
Summary
Essential oils are known as volatile oils, ethereal oils, or as the oil of the plant from which they were extracted, such as the peppermint oil that we have been working on in our research The biosynthesis of these volatile components is done in dedicated cell types present in almost all parts of the plant, from the leaves or flower to the roots depending on the plant’s genus. Perhaps the most important is the flexibility in the variation of its formulation to obtain specific characteristics [17] This is very important for application in sensors; for example, hydrophilic photopolymers based on poly(vinyl alcohol) and acrylamide have been used to detect humidity and different chemical substances [18,19]. HPDLC is used to detect peppermint oil adulterated with triethyl citrate by variations obtained in recording a holographic diffraction grating. In order to make this, peppermint oil is introduced in the HPDLC formulation to obtain a composite whose holographic response allows the detection of potential adulterants in the oil
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