A chemical modification process for a polymer component comprising at least one polymer comprising, as reactive groups, amine groups and/or hydroxyl groups, the process comprising a step of covalent reaction between some or all of the reactive groups and at least one functional compound comprising at least one group able to react in a covalent manner with said reactive groups, the functional compound(s) being selected from epoxide compounds, anhydride compounds, acyl halide compounds, silyl ether compounds and mixtures thereof, characterised in that the covalent reaction step is carried out in the presence of at least one supercritical fluid.

A surface functionalizing method for use in high-throughput in situ synthesis of nucleic acids by 3D inkjet printing. The method includes subjecting a surface of a substrate to hydroxyl enrichment treatment; adding hydrophobic molecules to the surface of the substrate, the hydrophobic molecules being not reactive with phosphoramidite monomers; spraying, by a multi-channel piezoelectric inkjet head assembly, an etching ink to a predetermined area on the surface of the substrate for micro-etching, the etching ink being prepared with a fluoride compound reactive with the hydrophobic molecules; and adding hydrophilic molecules to the surface of the substrate. By using the method, a functionalized surface with given areas being patterned can be formed on the surface of the substrate, and then a same multi-channel piezoelectric inkjet head assembly can be directly used for subsequent high-resolution printing of phosphoramidite monomers and synthesis of nucleic acids.

A surface functionalizing method for use in high-throughput in situ synthesis of nucleic acids by 3D inkjet printing. The method includes subjecting a surface of a substrate to hydroxyl enrichment treatment; adding hydrophobic molecules to the surface of the substrate, the hydrophobic molecules being not reactive with phosphoramidite monomers; spraying, by a multi-channel piezoelectric inkjet head assembly, an etching ink to a predetermined area on the surface of the substrate for micro-etching, the etching ink being prepared with a fluoride compound reactive with the hydrophobic molecules; and adding hydrophilic molecules to the surface of the substrate. By using the method, a functionalized surface with given areas being patterned can be formed on the surface of the substrate, and then a same multi-channel piezoelectric inkjet head assembly can be directly used for subsequent high-resolution printing of phosphoramidite monomers and synthesis of nucleic acids.

Disclosed herein are finished products, methods, compositions and kits for derivatizing plastic (e.g., “polymer”) surfaces in a manner that renders the surfaces appropriate for various downstream applications. For example, flow cells incorporating modified plastic surfaces provide greatly enhanced stability for retention of attached chemical species such as polypeptides and nucleic acids.

Polymeric materials are described which have a bioflavonoid coating, the bioflavonoid content of the coating comprising at least naringin and neohesperidin. The use of such coated polymeric materials is also described as well as the process for making the coated polymeric materials.

A light emitting thin film and a manufacturing method thereof, a light emitting device and a displaying substrate, which relates to the technical field of displaying. The light emitting thin film includes a polymer (1) and a quantum dot (2) bonded to the polymer (1); the quantum dot (2) includes a metal nanoparticle (3) and a core-shell structure connected to the metal nanoparticle (3); and the metal nanoparticle (3) is bonded to the polymer (1) by a sulfide bond.

A light emitting thin film and a manufacturing method thereof, a light emitting device and a displaying substrate, which relates to the technical field of displaying. The light emitting thin film includes a polymer (1) and a quantum dot (2) bonded to the polymer (1); the quantum dot (2) includes a metal nanoparticle (3) and a core-shell structure connected to the metal nanoparticle (3); and the metal nanoparticle (3) is bonded to the polymer (1) by a sulfide bond.

This invention relates to biodegradable starch-based pellets which foamable by irradiation, which are particularly suitable for the manufacture of foam articles, characterised in that they have a porous structure with a low porous external skin. This invention also relates to foam articles obtained from these.

Modified plastic surfaces with perfluoropolymers are provided, whereby plastic surfaces that are intended for use under tribological conditions have substantially improved assembly properties and/or sliding friction properties and exhibit a very low degree of wear. Accordingly, modified plastic surfaces with perfluoropolymers are provided in which, after a reactive conversion under mechanical stress at room temperature, at least the reactive —NH groups and/or —OH groups present at the surface of plastics are present in a chemically covalently coupled manner with the perfluoropolymer carboxylic acid halide present at least in the surface-proximate region of modified perfluoropolymer (micro)powders and/or with the grafted (meth)acrylic acid halide present via perfluoropolymer (peroxy) radicals of the perfluoropolymer (micro)powders and/or (meth)acrylic acid that has been modified into (meth)acrylic acid halide before the reactive conversion.

Modified plastic surfaces with perfluoropolymers are provided, whereby plastic surfaces that are intended for use under tribological conditions have substantially improved assembly properties and/or sliding friction properties and exhibit a very low degree of wear. Accordingly, modified plastic surfaces with perfluoropolymers are provided in which, after a reactive conversion under mechanical stress at room temperature, at least the reactive —NH groups and/or —OH groups present at the surface of plastics are present in a chemically covalently coupled manner with the perfluoropolymer carboxylic acid halide present at least in the surface-proximate region of modified perfluoropolymer (micro)powders and/or with the grafted (meth)acrylic acid halide present via perfluoropolymer (peroxy) radicals of the perfluoropolymer (micro)powders and/or (meth)acrylic acid that has been modified into (meth)acrylic acid halide before the reactive conversion.