One-pot double in-situ fabrication of transparent semi-aromatic polyamide nanocomposites with upconversion nanoparticles

Robust Strategy to Improve the Compatibility between Incorporated Upconversion Nanoparticles and the Bulk Transparent Polymer Matrix

“…26 Thus, the key points for preparing transparent polymer nanocomposites are the fabrication of well-dispersed nanoparticles and increasing the interface compatibility among the incorporated nanomaterials and the bulk polymer matrix to incorporate functional inorganic nanoparticles into the polymer matrix without agglomeration. 13,14,17 Recently, several methods have been proposed to prevent the agglomeration of functional inorganic nanoparticles among the in situ polymerization process while concerning the surface chemistry modification of incorporated inorganic nanoparticles. 27,28 These approaches involved ligand exchange of the original stabilizing ligands of the NPs to prevent the nanoparticle aggregation when the in situ polymerization process was performed.…”

“…Upconversion nanoparticles (UCNPs) have attracted much attention owing to the properties of turning long wavelength near-infrared light to short wavelength light, such as ultraviolet (UV) light and visible light. − Recently, UCNPs have been incorporated into transparent bulk polymers to fabricate bulk polymer nanocomposites with special upconversion fluorescence and transparent properties, which have wide applications in the 3D display, , solar cells, etc. − UCNPs have usually been combined with various transparent polymer matrices [such as polystyrene (PS), polyamides (PA), − polymethyl methacrylate (PMMA), , polydimethylsiloxane (PDMS), , etc.] to prepare bulk polymer nanocomposites due to the low cost and easy processing properties of these polymers .…”

“…However, the aggregation of nanoparticles was easy to observe and will lower the transparency of bulk polymer nanocomposites due to the interface light scattering between bulk polymers and nanoparticles . Thus, the key points for preparing transparent polymer nanocomposites are the fabrication of well-dispersed nanoparticles and increasing the interface compatibility among the incorporated nanomaterials and the bulk polymer matrix to incorporate functional inorganic nanoparticles into the polymer matrix without agglomeration. ,, …”

Strain-Induced Form Transition and Crystallization Behavior of the Transparent Polyamide

“…Their unique performances make polyamides one of the five major engineering thermoplastics and enable them to be widely used in the textile, electronics, aerospace, automotive, and medical device industries, as well as other fields [ 6 , 7 ]. With the demand for some special applications, an increasing number of polyamide varieties are appearing [ 8 , 9 ]. The transparent polyamide is a novel kind of polyamide and is different from conventional, commercial ones, e.g., PA6 and PA66, in which the alicyclic or aromatic structures increase steric hindrance and reduce the density of hydrogen bonds and the crystallization ability [ 10 , 11 ].…”

Facile Fabrication of Upconversion Photoluminescent Transparent Semiaromatic Polyamide Nanocomposites Through Interfacial Chemistry Modification

“…However, light scattering on the interface between polymer and nanoparticles and the nanoparticles agglomerated in the polymer matrix will decrease the transparency of polymer nanocomposites . Thus, the key point to obtain transparent polymer nanocomposites was to prevent their agglomeration during the polymerization process. , Several methods involve either the surface modification of nanoparticles or choosing appropriate polymer matrix to prevent the nanoparticles from agglomerating in the process of polymerization. − …”