Real-time adsorption of optical brightening agents on cellulose thin films

Sampl, Carina; Eyley, Samuel; Thielemans, Wim; Hirn, Ulrich; Spirk, Stefan

doi:10.1016/j.carbpol.2021.117826

Cited by 6 publications

(7 citation statements)

References 47 publications

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“…The yellowish tinge of the template got reduced significantly to provide a slight bluish tint or bright white appearance to the cellulosic framework. This was because the fluorescent chemicals in the OBs absorb the ultraviolet (UV) region of the electromagnetic spectrum to emit light in the blue‐violet region of the visible spectrum 33 …”

Section: Resultsmentioning

confidence: 99%

“…This cellulose‐OB agent interactions have been explained based on the complex mechanisms stemming from electrostatic and van‐der‐Waals interactions, hydrogen bonding, and varying kinetic factors 44,45 . Amount of non‐polar molecules in OB, amount of sulfonate groups, combined influence of cationic salts in the solution coupled with attractive van‐der‐Waals interaction, and bivalent cation induced coordination polymer formation result in effective OB‐cellulose adsorption 33 . Along with bright appearance, the resultant LTW made from OB treated LMW brought out a highly TW composite with luminescent behavior under UV light.…”

Section: Resultsmentioning

confidence: 99%

“…This was because the fluorescent chemicals in the OBs absorb the ultraviolet (UV) region of the electromagnetic spectrum to emit light in the blueviolet region of the visible spectrum. 33…”

Section: Characterization Of Tw Compositementioning

confidence: 99%

“…The present study addresses the above issue through a simple and cost‐effective strategy involving commercially available optical brightener (OB). OBs, also known as fluorescent whitening agents, are dyes that absorb light in the UV spectrum (340–370 nm) and re‐emit it in the longer wavelength range 33 . OBs are recognized to have a strong affinity for cellulose and they are widely used to alter the visual properties of polymers and papers.…”

Section: Introductionmentioning

confidence: 99%

“…OBs, also known as fluorescent whitening agents, are dyes that absorb light in the UV spectrum (340-370 nm) and re-emit it in the longer wavelength range. 33 OBs are recognized to have a strong affinity for cellulose and they are widely used to alter the visual properties of polymers and papers. Modification of LMW with OBs could therefore be an appropriate choice to mask the yellowness of LMW.…”

Section: Introductionmentioning

confidence: 99%

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Luminescent transparent wood from a woody cellulosic template treated with an optical brightener

Chathoth

Rao

Nair

et al. 2023

J of Applied Polymer Sci

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Transparent wood (TW) has attracted tremendous research interest due to its numerous adaptive features and applications as a sustainable material. The present study unveils a novel and simple method of preparing luminescent transparent wood (LTW) with good optical properties and UV-blocking nature. LTW was prepared by pre-treatment of lignin-modified wood (LMW) with a commercial fabric brightener/optical brightener (Ranipal ® ) prior to polymer infiltration. The resultant LTW showed unique bluish photoluminescence upon UV light irradiation. Under normal light illumination, the LTW exhibited a brilliant bright/white appearance compared to untreated TW samples. LTW fabricated using 1 mm thick silver oak wood veneer exhibited high transparency (82%) and high haze (90%) with enhanced UV blocking property. The novel LTW fabrication method using a readily available and low-cost fabric brightener has significantly reduced the overall process complexity of LTW preparation. The treatment with optical brightener had no adverse effect on the material quality. The fabricated LTW with good optical features can be an excellent bio-based input material to the multifunctional smart material category.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

“…This was because the fluorescent chemicals in the OBs absorb the ultraviolet (UV) region of the electromagnetic spectrum to emit light in the blueviolet region of the visible spectrum. 33…”

Section: Characterization Of Tw Compositementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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