Improvement of macroscale properties of TiO2/cellulose acetate hybrid films by solvent vapour annealing

Cellulose Acetate Incorporating Organically Functionalized CeO2 NPs: Efficient Materials for UV Filtering Applications

“…The Young’s modulus values of the investigated samples ( Figure 7 b) increased gradually by enhancing the CeO 2 content and varied between 1.65 GPa (CA) and 2.56 GPa (CACe-5) indicating a higher resistance to deformation and breakage, while the tensile toughness (measured as the area under the stress–strain curve) varied from 31 (CA) to 10.5 MJ m −3 (CACe-5), confirming the formation of materials more susceptible to breakage. The attained results are comparable to other cellulose acetate/nanoparticle systems reported in the literature [ 35 , 36 ].…”

“…Beyond the UV protection characteristic, the CACe films are also transparent to the visible light, the transmittance values at 600 nm are as follows: 79.3% for CACe-1, 79.0% for CACe-3 and 74.3% for CACe-5. Our films have similar UV-shielding properties with other materials reported in the literature such as TiO 2 /cellulose acetate hybrid films [ 36 ] or poly(L-lactide)/ZnO nanocomposites [ 48 ]. All these results recommend our materials as promising candidates for UV filtering application, mainly as UV-protective coatings in food packing, especially considering the current trends of the replacement of classic materials derived from petroleum (e.g., polyethylene) with renewable and biodegradable ones (cellulose derivatives) [ 49 , 50 ] in order to offer green solutions for environment protection.…”

Properties of Ultraviolet‐Shielding Composite Film Prepared from Cellulose Acetate with Eu(III) Complex

“…The Eu(III)-complex composite films presents a good performance in terms of their UV blocking ability and visible transparency, as compared to the previously reported CA based films with a variety of UV absorbers, such as graphene oxide, [10] ZnO [14] and TiO 2 . [15] the CA-GO film containing 0.50 wt % GO shielded 57 % of UV radiation, combined with anoptical transparency in visible light of 79 %. [10] The CA/ZnO/ MWCNTs composite nanofibers blocked UV light (200-400 nm) more 99 %, while 86 % for pure CA nanofibers.…”

“…[14] The 10TiO 2 -EPE/CA hybrid nanocomposite film exhibited high transparency (92 % at 650 nm) and good UV absorbance below 300 nm. [15] In general, our composite films benefit from the addition of rare earth element Eu(III), which possess a strong absorption in the UV range alongside with minimal absorption in visible, thus providing an optimum balance between the UV blocking ability and transparency. Because the Eu(III)-complex microdomains (less than 7 %) are samll in size, any reduction in transparency caused by the light scattering is also avoided.…”

“…[14] Cellulose triacetate based nanocomposites modified with solgel synthesized titanium dioxide nanoparticles (TiO 2 ) also presented a good performance in UV shielding. [15] In addition, rare-earth element complex, known as one of photoluminescent materials, attracts wide attentions due to their excellent UV absorption property. [16] However, few investigations were presented on the UV shielding composite film of CA grafted with rare-earth element complex.…”