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<p>Smart inks have displayed drawbacks, such as suboptimal performance, high expenses, and inadequate durability. In contrast, self-healing gels provide superior strength and high durability relative to traditional inks. A hydrogel composed of organic and inorganic components was developed from a composite of cellulose nanocrystals (CNCs), carboxymethyl cellulose (CMC), and nanoparticles of rare-earth aluminate (NRA). The usage of CNCs as a dispersant and nanofiller prevents the aggregation of NRA. For the production of a transparent print, NRA must be uniformly distributed throughout the CNC@CMC composite. The colorimetric parameters and photoluminescence profiles demonstrated a color shift to green when the transparent hydrogel film was subjected to UV light. The stamped paper samples were excited at 365&#xa0;nm, producing an emission peak at 518&#xa0;nm. Numerous analysis techniques were used to describe the morphology of the printed samples. The morphologies of NRA and CNCs were evaluated by transmission electron microscopy (TEM). The crystal of NRA was also studied by X-ray diffraction (XRD). NRA indicated diameters from 30 to 170&#xa0;nm, while CNCs exhibited diameters between 55 and 125&#xa0;nm. The current hydrogel offers a dependable anticounterfeiting mechanism for several commercial items.</p>

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Cellulose nanowhisker-reinforced carboxymethyl cellulose hydrogel for anticounterfeiting

  • 期刊论文

  • 发表日期：

    2025年9月25日

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  • Mohamed Gouda,
  • Manal F. Abou Taleb

摘要

Smart inks have displayed drawbacks, such as suboptimal performance, high expenses, and inadequate durability. In contrast, self-healing gels provide superior strength and high durability relative to traditional inks. A hydrogel composed of organic and inorganic components was developed from a composite of cellulose nanocrystals (CNCs), carboxymethyl cellulose (CMC), and nanoparticles of rare-earth aluminate (NRA). The usage of CNCs as a dispersant and nanofiller prevents the aggregation of NRA. For the production of a transparent print, NRA must be uniformly distributed throughout the CNC@CMC composite. The colorimetric parameters and photoluminescence profiles demonstrated a color shift to green when the transparent hydrogel film was subjected to UV light. The stamped paper samples were excited at 365 nm, producing an emission peak at 518 nm. Numerous analysis techniques were used to describe the morphology of the printed samples. The morphologies of NRA and CNCs were evaluated by transmission electron microscopy (TEM). The crystal of NRA was also studied by X-ray diffraction (XRD). NRA indicated diameters from 30 to 170 nm, while CNCs exhibited diameters between 55 and 125 nm. The current hydrogel offers a dependable anticounterfeiting mechanism for several commercial items.