Pure Films Research Articles

Joint experimental-computational: Revealing the role of sodium poly(heptazineimide) in the selective separation of CO2 in PEBAX-based mixed matrix membranes

Mixed matrix membranes (MMMs) with the dual properties of porous materials and polymer matrix membranes have become one of the most optimal solutions to the gas separation problem. However, the adapted porous material and the explicit transport mechanism of gases within the mixed matrix membrane hinder its further commercialization. Thanks to their porous nature and tunable gas adsorption properties, heteroatom-doped porous materials, especially nitrogen-doped porous materials, are widely used to design and prepare advanced CO2 separation membranes. Herein, a layered two-dimensional nano-sheet with a nitrogen content of 44.7 % was successfully synthesized via thermal polymerization. And nano-sheets were homogeneously dispersed in a Pebax matrix to make a composite film. Since the CO2 affinity of the nitrogen functional site and the PEO flexible chain, realizing the synergistic improvement of CO2 permeability and selectivity. A comprehensive combined permeation experimental/simulation characterization reveals the CO2 transport pathway within the membrane, indicating the mechanism of action of nitrogen-doped porous packing on CO2 diffusion. Among these, the CO2 permeability of the mixed matrix film containing 5 wt% sodium poly(heptazine imide) (NaPHI) reached 153 Barrer at a feed gas pressure of 9 bar, nearly 149 % compared to the pure Pebax film. The selectivity of CO2/N2 was enhanced to 105, exhibiting a remarkable increase of 159 % and exceeding the 2019 Robeson limit. Importantly, the present work further reveals and demonstrates the gas separation mechanism of nitrogen-doped porous filler/polymer hybrid matrix membranes, which provides new ideas for the design and application of heteroatom-doped porous fillers in the field of gas separation.

Structural, Electronic Structure, and Electrical Properties of Pure and Vanadium-Doped CuCrO2 Thin Films

Structural, Electronic Structure, and Electrical Properties of Pure and Vanadium-Doped CuCrO2 Thin Films

Properties of WS2-based multiple-layer films deposited by electrohydrodynamic jet deposition

This paper aims to provide efficient methods for enhancing the mechanical properties and tribological performance of WS2-based film. Pure WS2 film (SW), WS2-Ni composite film (SWN), WS2/WS2-Ni/Ni multiple-layer film (SWN-g), and WS2/WS2-Ni/Ni multiple-layer film on textured surface (SWN-t) were prepared on the cemented carbides substrates by electrohydrodynamic jet deposition. The surface morphology and composition of the deposited films were observed through scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDS) elemental analysis. The mechanical properties of films were measured through nanoindentation experiments, while the adhesion strength between the film and substrate was evaluated through scratch tests. The friction and wear performance were investigated through reciprocating sliding friction tests. Results indicated that multiple-layer film deposited on the textured surface (SWN-t) exhibited great tribological properties, it has the lowest friction coefficient and the highest adhesion strength. Compared with the pure WS2 film, the average friction coefficient decreased by 66.1 %, and the adhesion strength between films and substrate increased by 50.4 %.

Constructing Heterostructured MWCNT-BN Hybrid Fillers in Electrospun TPU Films to Achieve Superior Thermal Conductivity and Electrical Insulation Properties.

The development of thermally conductive polymer/boron nitride (BN) composites with excellent electrically insulating properties is urgently demanded for electronic devices. However, the method of constructing an efficient thermally conductive network is still challenging. In the present work, heterostructured multi-walled carbon nanotube-boron nitride (MWCNT-BN) hybrids were easily prepared using an electrostatic self-assembly method. The thermally conductive network of the MWCNT-BN in the thermoplastic polyurethane (TPU) matrix was achieved by the electrospinning and stack-molding process. As a result, the in-plane thermal conductivity of TPU composite films reached 7.28 W m-1 K-1, an increase of 959.4% compared to pure TPU films. In addition, the Foygel model showed that the MWCNT-BN hybrid filler could largely decrease thermal resistance compared to that of BN filler and further reduce phonon scattering. Finally, the excellent electrically insulating properties (about 1012 Ω·cm) and superior flexibility of composite film make it a promising material in electronic equipment. This work offers a new idea for designing BN-based hybrids, which have broad prospects in preparing thermally conductive composites for further practical thermal management fields.

Self-assembly TiO2@Silane@SiO2 core-shell as s-scheme heterojunction photocatalyst against methylene blue degradation: synthesis and mechanism insights

Pollutants are the most critical threats to the health of water resources. On this basis, fabricating a core-shell as an S-scheme heterojunction photocatalyst for the treatment of wastewater from methylene blue (MB) dye was aimed in this research. In this study, TiO2-doped silanized silica dielectric nanocomposites were synthesized as self-assembly TiO2@Silane@SiO2 heterojunction through sol-gel and solvothermal methods using tetrabutyl orthotitanate (TBOT) as precursor followed by calcination at 650 °C for 3 h. Silanization of silica nanoparticles was done at two different concentrations. The results showed that layer-by-layer synthesis (i.e. self-assembly of APTES on SiO2, precipitation of TiO2 layer on it by sol-gel technique and then calcination) was the optimum preparation method. The structural and morphological features were investigated by XRD, FTIR, BET, TGA-DTG, FE-SEM, EIS and ESR techniques. It was found that the band gap energy of nanocomposite particles reduced from 3.14 eV for the sample prepared by the solvothermal method (i.e. without APTES) to 2.91 eV (i.e. shifting the light absorption from UV to the visible region) for the sample prepared by the sol-gel layer-by-layer method. The prepared samples were used against the photo-degradation of MB. TiO2@Silane@SiO2 core-shell nanoparticles exhibited efficient photocatalytic degradation against MB with a photodegradation efficiency of 85 % under UV and 60 % under visible irradiation. Finally, the prepared nanocomposite particles were incorporated to an emulsion acrylic resin to prepare photocatalytic polymer film. The prepared films were evaluated for photocatalytic degradation of MB stain and mechanical performances. It was found that the TiO2@Silane@SiO2 nanocomposite particles that prepared by layer-by-layer method caused about 56 % improvement in hydrophobicity, 276.7 % increment in the tensile strength, 109.6 times enhancement in the modulus, 381.4 times enhancement in the toughness and 57.6 times improvement in the elongation at break of the acrylic film compared to the pure TiO2-containing acrylic film, respectively.

Preparation of polyimide films with ultralow dielectric loss at high frequency by reducing intermolecular friction

Due to the rapid development of high frequency and high rate communication technology, polyimide (PI) films with ultra-low dielectric loss (Df) at high frequency, excellent thermal and mechanical properties are urgently needed. A series of PI films with ultra-low Df were prepared by introducing different mesogen units. Among them, one novel PI film with biphenyl liquid-crystal-like units (BAHQ-TFMB) achieve a recorded low Df of 0.00169 (10 GHz) which surpasses previous studies on pure PI bulk films. Importantly, the high degree of collinearity of the friction work (Wf) and Df of PI films (Pearson's r = 0.992) was confirmed, which indicate that Wf among PI macromolecules plays an important role in determining Df of PI films. To reveal underlying reason for reducing the Wf and Df of PI films, the contribution of the degree of orientation and crystallinity of PI films with or without liquid-crystal-like structures were comparative studied. Through a two-dimensional orientation determinant, it is found that increasing the crystallinity of liquid-crystal-like PI films is the main contribution to reducing Wf and corresponding Df of PI films while the orientation of PI films seems to have weak effect. Moreover, BAHQ-TFMB PI film exhibits excellent mechanical properties. The tensile strengths is 145.5 ± 12.0 MPa and Young's moduli is 4.76 ± 0.28 GPa.

Alumina fiber/reduced graphene oxide composite films for high-temperature heating and sensing

Reduced graphene oxide (rGO) and its composite films have aroused intense interest in electrical heating and temperature sensing fields, but the working temperature is usually limited because the internal layer-stacked structure is breakable at high temperature. In order to promote structure stability, a series of Al2O3 fiber/rGO composite films were developed. It is found that gaseous products mainly including CO2 and CO during thermal reduction contribute to pores, bulges and intervals in rGO films, while appropriate Al2O3 fiber has an adhesion effect on rGO sheets and tightens them together, in which case defects can hardly form and the layered structure is significantly compacted. Therefore, the degree of stacking order and tensile strength tend to increase, resulting in the improvement of structure stability and decrease of electrical resistivity. However, excess Al2O3 fiber makes the formation of debris and cracks, causing the deterioration of conductivity and mechanical properties. With 20 wt% Al2O3 fiber, the composite films can bear higher heating voltage than pure rGO films and stabilize at 634.65 °C under 36 V, which also keep a good linearity between resistance and temperature from 25 to 600 °C, exhibiting a considerable temperature coefficient of resistance (TCR) with −1.70×10−3 /°C at room temperature.

Fabrication of antibacterial food packaging from polyvinyl alcohol/sodium caseinate composite films cross‐linked with lactic acid

AbstractIn this study, Polyvinyl Alcohol (PVA)/Sodium Caseinate (NaCAS) were cross‐linked by mixing with Lactic acid (LA) in different proportions (0.5%, 1%, 2%, and 4%). Composite films were obtained from the prepared solutions using the solution casting method. The obtained composite films were appeared as slightly opaque and lightly yellowish, but mostly transparent. As the amount of LA increased, the polarized microscope surface images of the composite films became rougher. It was explained that cross‐linking occurred with the aldehyde groups (CHO) determined in the Fourier transform infrared spectroscopy (FTIR) analysis. The increasing 5% weight loss temperature of the films because of cross‐linking also increased the thermal strength. In X‐ray diffraction analysis (XRD), the 2θ peak intensity of the 2% LA‐added film, which had the highest cross‐link density, was indicated to be the lowest. It was reported that 4% and above the LA contribution rate negatively affects the physical and mechanical properties of the PVA/NaCAS matrix. The pure PVA/NaCAS film had 30.08 MPa tensile strength and 1.49% tensile strain. The film with 2% LA added showed the tensile strength value closest to the pure film with 23.89 MPa. With a 6.52% value, the film containing 2% LA showed the lowest moisture retention behavior. Pure PVA/NaCAS film, which has a hydrophilic structure with a contact angle of 57°, gained hydrophobic ability with the addition of LA. The 1% LA‐added film exhibited the highest hydrophobic behavior with a contact angle value of 99°. With the LA additive, an increase in the contact angle values of the composite films was observed between approximately 61% and 74%. In addition, the water vapor permeability (WVTR) with 582.37 g/m2 day value of pure PVA/NaCAS composite film decreased after the addition of LA. It was degraded to 322.72 g/m2 day WVTR value in the 1% LA‐added film. 100% antibacterial activity against both E. coli and S. aureus was observed in composite films containing 1% or more LA additive. The resulting films were suggested to be used as active food packaging with antibacterial effects.Highlights LA can be used as a crosslinking agent for PVA/NaCAS blends. 2% LA contribution has shown the highest cross‐linking density. 4% LA and higher LA contribution would negatively affect the mechanical properties of the matrix. High antibacterial activity was obtained against both E. coli and S. aureus in films containing 1% or more LA.

Synthesis and Characterization Studies of Pure and Co Doped ZnO Nano Thin Films

General Background: Thin-film technology is pivotal in advancing modern optoelectronic devices due to its ability to tailor material properties at the nanoscale. Specific Background: Zinc oxide (ZnO) and cobalt oxide (CoO) are prominent materials in this field, with doping techniques such as cobalt incorporation offering potential enhancements in film properties. Knowledge Gap: The impact of cobalt doping on the structural and optical properties of ZnO thin films remains inadequately explored, particularly concerning varying doping concentrations. Aims: Aims to elucidate the effects of cobalt doping on ZnO thin films' structural and optical characteristics, with concentrations of Zn0.6Co0.4O and Zn0.8Co0.2O compared to pure ZnO and CoO films. Results: Thin films were prepared via spin coating on glass substrates at 3000 rpm for 30 seconds. X-ray diffraction analysis revealed that pure ZnO films possess a hexagonal polycrystalline structure, whereas CoO films exhibit a cubic structure. Doping with cobalt resulted in a decrease in peak intensity at the (111) orientation and an increase in grain size. Optical measurements indicated enhanced transmittance and modified absorbance spectra with increased cobalt content, showing maximum absorbance at short wavelengths and diminished values in the visible region. Reflectivity increased with photon energy before decreasing at higher energies. Novelty: Cobalt doping significantly alters both structural and optical properties of ZnO films, with distinct changes in lattice constants, grain size, and optical behavior, suggesting a potential route for optimizing ZnO-based materials. Implications: Cobalt-doped ZnO films hold promise for improved performance in optoelectronic applications, such as solar cells and sensors, necessitating further research into diverse doping strategies to fully harness their technological potential. Highlights: Cobalt doping alters ZnO thin films' structural and optical properties. Spin coating method used at 3000 rpm for 30 seconds. Enhanced optical properties suitable for optoelectronic applications. Keywords: Thin films, Zinc oxide, Cobalt doping, Optical properties, X-ray diffraction

Electrodeposition of ReMo alloys

The electrodeposition of superconducting ReMo alloys is investigated using highly concentrated electrolytes with acetate, citrate, and the two oxometallate anions, MoO42− and ReO4−. The effects of applied deposition current, the concentrations of acetate, citrate, and metal source in the electrolyte on the film composition, faraday efficiency as well as the partial current densities of Re and Mo are systematically studied. A hybrid complex species, such as (MoO42−)(ReO4−)(HCit3−)2 and its partially reduced form, is proposed to form and mediate the co-deposition reaction. The morphology and superconductivity of alloy films are characterized using microscopy and cryogenic four-probe measurements. The electrodeposited ReMo alloy films maintain the same amorphous grain structure and the same enhanced superconducting transition temperature as pure Re films.

Production of nanocomposite films based on low density polyethylene/surface activated nanoperlite for modified atmosphere packaging applications

The modified atmosphere packaging films based on polyethylene nanocomposites reinforced with perlite nanoparticles were prepared using a blow molding machine. The perlite particles were first reduced to nano dimensions using an abrasive mill, then the porosity of nanoperlite was increased to improve their efficiency in absorbing ethylene gas. For this purpose, 6 normal sodium hydroxide solution at 50°C temperature was used. Finally, perlite nanoparticles were modified by polymethyl hydrogen siloxane silane compound. In each of the stages of grinding and modifying the perlite surface, the necessary tests including dynamic light diffraction test, nitrogen absorption test and ethylene gas absorption test were performed using gas chromatography method. The results showed that the size of perlite particles was reduced to 500 nm by using an abrasive mill, and the surface modification process increased the specific surface area of perlite by 10 times. Based on this, the amount of ethylene gas absorption in perlite nanoparticles with modified surface increased up to 3 times compared to normal perlite. The results of the gas chromatography test showed that the nanocomposite film based on polyethylene reinforced with 6% by weight of modified perlite nanoparticles has several times the efficiency in absorbing ethylene gas compared to the potassium permanganate sachets The results of the mechanical properties tests of nanocomposite film in comparison with pure polyethylene film showed that nanocomposite film has higher properties than pure polyethylene. The results of shelf-life tests of green tomatoes packed in nanocomposite film based on polyethylene reinforced with modified nanoperlite showed that green tomatoes can be stored for two months using the prepared modified atmosphere packaging.

Self-Diffusion of Ge in Amorphous Ge x Si1-x Films Studied In Situ by Neutron Reflectometry.

Ge x Si1-x alloys are gaining renewed interest for many applications in electronics and optics, especially for miniaturized devices showing quantum size effects. Point defects and atomic diffusion play a crucial role in miniaturized and metastable systems. In the present work, Ge self-diffusion in sputter deposited amorphous Ge x Si1-x alloys is studied in situ as a function of Ge content x = 0.13, 0.43, 0.8, and 1.0 by neutron reflectometry. The determined Ge self-diffusivities obey the Arrhenius law in the investigated temperature ranges. The higher the Ge content x, the higher the Ge self-diffusivity at the same temperature. The activation enthalpy decreases with x from 4.4 eV for self-diffusion in pure silicon films to about 2 eV self-diffusion in Ge0.8Si0.2 and Ge. The decrease of the activation enthalpy for amorphous Ge x Si1-x is similar to the case of crystalline Ge x Si1-x . Possible explanations are discussed.

Superhydrophilic antireflection films with excellent optical and mechanical performance for perovskite solar cells

SiO2-based antireflection (AR) films can obviously improve the transmittance of the glass cover on the solar cells. Nevertheless, it’s still challenging to fabricate SiO2 films in a facile way with great antireflective properties, high hardness and good weather resistance to ensure their long-term use in outdoor environments. To solve this problem, a double-layer broadband SiO2 antireflective film with high transmittance increase and excellent mechanical properties was successfully prepared via an acid-catalyzed sol–gel method using polyethylene glycol (PEG) as pore-forming agent. The porous PEG2000-modified SiO2 films were selected as the outer layer for coating onto the pure SiO2 film to form double-layer SiO2 films with graded refractive index. When the mass ratio of PEG2000 to TEOS was 40 %, the obtained film showed the highest transmittance increase of 3.03 % in the wavelength range of 380–1100 nm and a high hardness of 3H. After applied to the perovskite solar cell, a significant enhancement of 1.19 % in photoelectric conversion efficiency (PCE) was achieved compared to the solar cell covered with bare substrate. Furthermore, the water contact angle (WCA) was also reduced to 6° while that of pure SiO2 film was 51.3°, endowing the double-layer SiO2 film superhydrophilic and anti-fogging performance. After the weather resistance test, the transmittance loss of the film was only 0.38 %. Therefore, this work demonstrated that the use of an appropriate amount of pore-forming agent PEG and the double-layer graded refractive index structure can enhance the transmittance of acid-catalyzed SiO₂ films, while maintaining high hardness and good weathering resistance for perovskite solar cells.

Magnetic biochar from spent coffee grounds as filler in bioplastic composites

This study focuses on the synthesis of magnetic biochar derived from spent coffee grounds and their use in biodegradable pectin composite films. X-ray diffraction and Raman spectroscopy confirmed an amorphous char structure with embedded crystalline magnetite in the magnetic biochar. For the composite films, the hysteresis loops show a magnetic behavior reminiscent of a soft magnet with a low coercive field of 90 Oe and 14 % remanence. Thermogravimetric analysis revealed improved thermal stability of the composite films compared to pure pectin films. The proposed approach offers enhanced thermal properties and magnetic functionality, with potential applications in sustainable packaging, electromagnetic shielding and environmental sensing.

Investigation on optical and electrical properties of multilayer ITO/AZO/ITO transparent conductive oxides

This paper examines how varying the thickness of the indium tin oxide (ITO) seed layer, ranging from 8 to 20 nm, impacts the optical, electrical, and structural properties of triple-layer transparent conductive oxide ITO/aluminum doped zinc oxide (AZO)/ITO. ITO and AZO films were deposited by DC and RF magnetron sputtering, respectively. The thickness and density of each layer were measured by X-ray reflectometry (XRR). X-ray diffraction showed that as the thickness of the ITO seed layer increased, both the average size of the crystallites and the volume of the crystalline phase in the AZO film also increased. Measurements of the electrical characteristics indicated a decrease in resistivity as the thickness of the ITO seed layer increased. This reduction is attributed to enhanced charge mobility, resulting from improved crystallinity. It has been shown that a 20-nm-thick ITO seed layer is sufficient to achieve a charge mobility comparable to that of pure ITO films. The photoluminescence spectra have shown a decrease in the concentration of the oxygen vacancies with the introduction of both the cover and seed layers of ITO. The figure of merits (FOM) of the triple-layer coatings and the optical constants of the AZO and ITO films were calculated. The results of this paper indicate that the ITO20/AZO48/ITO12 triple-layer coating possesses optimal characteristics for use in high-efficiency silicon solar cells.

Biodegradable chitosan-based biofilms incorporated with Camellia oleifera residue protein for food packaging

Biodegradable films have attracted considerable eco-friendly applications in food packaging, preservation, and separation. This research used a protein mixture containing polyphenols, flavonoids, and tea saponins extracted from Camellia oleifera residues through alkaline dissolution and acid precipitation to prepare biodegradable films. By blending the protein with chitosan, the obtained biopolymer films exhibited improved properties such as hydration, permeability, strength and flexibility, while also showing reduced water solubility. In addition, chitosan-based C. oleifera residue protein biofilms also possessed a significant enhancement in the biofilm's antioxidant, antimicrobial and biodegradable capabilities. Scanning electron microscopy revealed slight irregularities on the film surface when augmented with C. oleifera residue protein, leading to increased cross-sectional roughness and porosity compared to pure chitosan films. These enhancements notably prolonged the shelf life of perishable fruits such as strawberries. Overall, this research used a protein mixture strength, and flexibility while showing reduced also significantly enhanced the biofilm's antioxidant, creating eco-friendly and effective biodegradable food packaging biofilms, contributing to the advancement of sustainable packaging materials.

High‐performance cross‐linked SiCOH/polyimide composite film with an ultralow dielectric constant at high frequency

AbstractUltralow‐k materials with promising comprehensive performance to meet the increasing requirements of high‐frequency communication are highly desired. Here, a cross‐linked porous polymer SiCOH, synthesized via simple sol–gel method, was used as the filler to prepare SiCOH/PI composite films by physically blending, which demonstrates ultralow dielectric constant at high frequency. Notably, only 2.5% of SiCOH in the composite can significantly reduce the dielectric constant of PI from 3.0 to an ultralow value of 1.7 in the 9.5–12.4 GHz, together with a low dielectric loss of 0.029. Additionally, the SiCOH/PI composite maintains a high tensile strength of 82.4 MPa and a tensile modulus of 1.82 GPa, which is comparable to pure PI film. While the glass transition temperature (Tg) increases to 370°C and the linear expansion coefficient is reduced to 30.7 ppm/°C, both of which are superior to those of pure PI film. Moreover, by introducing the hydrophobic SiCOH into PI, the contact angle of the composite films increased to 92.0°–99.0°. This simple and low‐cost method not only effectively lowers the dielectric constant of PI but also improves the thermal stability, mechanical properties, and hydrophobic ability, greatly boosts the practical application of PI in high‐frequency communication in the future.

Inspirations, techniques and institutionality. Animation in Józef Robakowski’s experimental oeuvre

Józef Robakowski’s cinematic oeuvre functions mainly as an experimental form of audiovisual art exhibited in gallery spaces. In his avant-garde activities this intermedia artist, associated with the Film Form Workshop, often used techniques of animated film, as is evidenced by the author’s textual analysis of the films: Market (1970), Test 1 (1971), Test II (1971), Dynamic Rectangle (1971), 22x (1971), Impulsator (2000), Impulsator VI (2001), Attention Light! (2004). The analysis focuses on the techniques used by Robakowski as well as his potential or explicit inspirations. Creating experimental animations, often in the spirit of “pure film”, the avant-gardist has been appropriated by other scholarly disciplines such as art history or new media. The aim of this article is to include Józef Robakowski in the discourse of film studies: to demonstrate his stance as an animator over the course of his artistic work to date, but above all to place him in the history of Polish animated film.

Introducing steric groups to thermally activated delayed fluorescence emitter for constructing efficient non-doped solution-processed organic light-emitting diodes

Solution-processed organic light-emitting diodes (OLEDs) remain a reliable approach towards large-area and flexible display devices, but also hold higher requirement on luminescent materials. It is still challenge to develop emitting layers with great solution-processable property and excellent luminous behavior, and especially difficult for non-doped emitting materials. In this work, a TADF emitter, namely 2,3,5,6-tetrakis(4-([1,1':3′,1″-terphenyl]-5′-yl)-9H-carbazol-9-yl)benzonitrile (3Ph-4CzBN), was designed and synthesized by introducing the steric-hindrance triphenyl unit to 2,3,5,6-tetrakis(carbazol-9-yl) benzonitrile (4CzBN) which is usually applied to vacuum evaporation. The incorporation of triphenyl groups significantly increased the molecule weight, thereby rendering 3Ph-4CzBN suitable for solution-processed OLEDs. Meanwhile, 3Ph-4CzBN exhibited two-fold of photoluminescence quantum yield values in pure film than 4CzBN, indicating fluorescence quenching was relatively suppressed by steric groups. The solution-processed OLEDs employed 3Ph-4CzBN as non-doped emitting layer, achieved a maximum external quantum efficiency of 12.8 %, as well as current efficiency and power efficiency up to 34.2 cd A−1 and 23.9 lm W−1, respectively.

Preparation and Characterization of Cellulose Nanocrystal‐Doped Cellulose Triacetate Optical Films by Sol‐Gel Process

AbstractA bio‐based nanocomposite optical film was obtained through a simple sol‐gel process and solution casting. The dispersion effect of cellulose nanocrystals (CNCs) gel and the optical properties, mechanical performance and thermal stability of CNC‐doped cellulose triacetate (TAC) films (TAC−X) were systematically evaluated. The results show that CNCs can be well dispersed in hydrophobic organic solvents and TAC matrices through the sol‐gel process. TAC−X film has excellent optical properties, its light transmittance is above 92 %, its haze value and birefringence are low, ranging from 0.21±0.01 % to 0.38±0.02 %, and (1.64±0.26)×10−6 to (2.49±0.50)×10−6 respectively. When doped with 2 wt % CNCs, the tensile strength and Young's modulus of the TAC‐2 film were 33.0 % and 30.1 % higher than those of the pure TAC film, separately. At the same time, the TAC−X film also maintains good thermal stability, with its glass transition temperature and maximum decomposition temperature falling between 215–216 °C and 366–368 °C respectively. The simple sol‐gel process provides a convenient and efficient way to use CNCs doping to enhance the physical and mechanical properties of TAC optical films.