Two-color photosensitive laser Direct writing (TCS-DLW) is a novel nanolithography technique, which can break the optical diffraction limit and directly realize the fabrication of arbitrary 2D/3D micro-nano structures with sub-hundred nanometer resolution. Organic polymer photoresist is a medium and carrier for micro and nano fabrication by two-color photosensitive laser direct writing technology, which directly affects the precision and authenticity of the micro and nano structures. Recently, Chinese scientists developed a polyvinylpyrrolidone (PVP) hybrid two-color photoresist. PVP has good compatibility with the active monomer of photoresist, which can improve the mechanical strength of photoresist, increase the conversion rate of polymerization monomer and reduce the polymerization threshold. The introduction of PVP also reduces the volume shrinkage of the photoresist from 18% to 3%, greatly reduces the internal stress of the fabricated micro and nano structures, and improves the accuracy of the lithography and the authenticity of the micro and nano structures. Compared…

Polyvinylpyrrolidone (PVP) is a high-end fine chemical downstream of acetylene, which is a polymer material with excellent performance, with excellent biocompatibility, solubility (soluble in water, but also soluble in many organic solvents), complex, dispersibility, film formation, solubilization, bonding, chemical stability, bioinert and safe and non-toxic. Widely used in cosmetics, medicine and health, food, textile printing and dyeing, paper making, adhesives, coatings,pigments, detergents, metal processing, energy, polymer polymerization, electronics, separation film, lithium battery, photovoltaic, medical polymer materials,nanomaterials, graphene, catalysts, adsorption materials and agriculture and animal husbandry and other fields. At present, the new uses of PVP are still emerging and in the ascendant. The new application of PVP in the field of lithium-ion battery and photovoltaic has attracted great attention in the industry,however, the new use of PVP in fruit preservation has not attracted enough attention. Harvested in the hot and rainy Meiyu season, the postharvest tissue metabolism is strong, easy…

The application of PVP in binder PVP has special adhesion to glass, metal and plastic, paper, fabric surface; Coupled with its characteristics of hydrophilicity, dispersion stability, non-thixotropy, thickening, etc., it is widely used in various binder formulations. There are two types of applications. Class is to PVP as the main component of the adhesive, the other is to use the binding properties of PVP in other products that need binder components, such as coatings, inks, glazing agents, various tablets, granules, sintered materials glaze and so on. Application in adhesives As the main component of adhesives, PVP is the most widely used in industry, such as solid glue sticks, pressure sensitive adhesives and rewet adhesives. Solid glue stick is a new type of office (including school students) glue, because of its easy to use coating, strong initial adhesion, suitable for all kinds of paper, flat and wrinkly after bonding, to overcome…

In recent years, the good characteristics of water-soluble polymers have made them widely used in the field of cosmetics, and many cosmetics have the addition of water-soluble polymer compounds. The consumption of water-soluble polymer compounds in the cosmetics industry ranks fifth after that of paper, textile, food and adhesives. Before the 1950s, people mainly used natural polymers, such as yarrow gum, acacia gum, gelatin, casein gum, etc., due to the instability of its source and quality, as well as its vulnerability to microbial contamination, the 1960s began to gradually be replaced by semi-synthetic polymers such as cellulose derivatives and synthetic polymers such as vinylpyrrolidone polymers. Due to the special requirements of cosmetics, the high safety and stability of PVP polymers, their compatibility with many other compounds, and their unique and excellent solubility make them the leading products of water-soluble synthetic polymers used in the cosmetics industry. In the structural consumption…

Po1y(ethylene pyrrolidone) is a polymer formed from the polymerization of ethylene pyrrolidone monomer. PVP has unique three-dimensional structure and physical and chemical properties, and is widely used in medicine, cosmetics, food and industry. structureThe molecular structure of PVP is formed by polymerization of vinylpyrrolidone monomer (n-vinylpyrrolidone). The vinylpyrrolidone molecule consists of a pyrrolidone ring and a vinyl group. In the polymerization process, the vinyl reacts with oxygen atoms on the pyrrolidone ring to form a polymerization chain. The molecular weight of PVP can be controlled by adjusting the amount of vinylpyrrolidone monomer and the polymerization conditions. The three-dimensional structure of PVP is mainly determined by the conformation of the polymerization chain. Due to the limitation of the bond length and bond Angle between vinyl and the oxygen atom on the pyrrolidone ring, the PVP polymerized chain presents a curved conformation. This conformation makes PVP have high solubility and fluidity, can…