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Luminescent polyvinyl alcohol material and preparation method thereof
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A polyvinyl alcohol and raw material technology, applied in the field of luminescent polyvinyl alcohol materials and its preparation, can solve the problems of low brightness and achieve the effects of high brightness, good compatibility and excellent mechanical properties
Active Publication Date: 2020-07-31
湖南隆铼新材料科技有限公司
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Problems solved by technology
However, the current luminescent polyvinyl alcohol materials have low brightness, which limits their application scope to a certain extent.
Method used
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[0029] The preparation method of the above-mentioned light-emitting polyvinyl alcohol material according to an embodiment of the present invention includes the following steps: dissolving polyvinyl alcohol, aldehyde acid and rare earth element ionic compound in a solvent, and adjusting the pH to neutral or alkaline, Stir at 140°C and then dry to obtain the luminescent polyvinyl alcohol material.
[0030] The preparation method of the luminescent polyvinyl alcohol material in this embodiment effectively bonds the luminescent rare earth ions to the polyvinyl alcohol molecules through the two functional groups of the aldehyde group and the carboxyl group of the aldehyde acid, avoiding the poor compatibility caused by physical mixing , poor light transmittance, and reduced mechanical properties, and it takes a short time, and the process is simple and easy. In addition, it can be cooled and left to dry naturally, and it can be easily processed into film or spinning during the proce...
Embodiment 1
[0036] Weigh 3g of polyvinyl alcohol and add it to 17g of water, stir in a 90°C constant temperature water bath for 1.5 hours to obtain a 15% polyvinyl alcohol aqueous solution, and use water as a solvent to prepare Eu(NO 3 ) 3 solution and 5mol / L ammonia water.
[0037] Add 1.008g glyoxylic acid to the prepared polyvinyl alcohol solution, then add 3ml prepared Eu(NO 3 ) 3 The solution and 2.5ml of prepared ammonia water were stirred in a constant temperature water bath at 80°C for 1 hour, cooled and then poured on a glass sheet, cast into a film and dried naturally to obtain a film-like luminescent polyvinyl alcohol material.
Embodiment 2
[0039]Weigh 3g of polyvinyl alcohol and add it to 17g of water, stir in a constant temperature water bath at 90°C for 1.5 hours to obtain a 15% polyvinyl alcohol aqueous solution, and use water as a solvent to prepare Sm(NO 3 ) 3 solution and 5mol / L ammonia water.
[0040] Add 1.008g glyoxylic acid to the prepared polyvinyl alcohol solution, then add 3ml prepared Sm(NO 3 ) 3 The solution and 2.5ml of prepared ammonia water were stirred in a constant temperature oil bath at 80°C for 1 hour, cooled and allowed to dry naturally to obtain a luminescent polyvinyl alcohol material.
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Abstract
The invention relates to a luminescent polyvinyl alcohol material and a preparation method thereof. The luminescent polyvinyl alcohol material is mainly prepared from the following raw materials: polyvinyl alcohol, aldehyde acid and rare earth element ionic compounds. According to the preparation method, rare earth ions are introduced into polyvinyl alcohol molecules by means of chemical bonding;a polyvinyl alcohol main chain has abundant hydroxyl groups, and the aldehyde acid has two functional groups, i.e., aldehyde group and carboxyl group, wherein the aldehyde group and the hydroxyl groupof the polyvinyl alcohol can be subjected to a chemical reaction so as to generate stable polyvinyl acetal; furthermore, the luminescent rare earth ions and the carboxyl group of the aldehyde acid can be well subjected to a coordination reaction. Therefore, the rare earth ions can be well introduced into the molecules of the polyvinyl alcohol by means of the aldehyde acid, so that the adverse effects caused by pure physical mixing can be overcome, and the luminescent polyvinyl alcohol material with a single component is obtained on the basis of guaranteeing certain mechanical properties; theluminescent polyvinyl alcohol material has an important application value in the aspects of decoration, anti-counterfeiting lighting and display.
Description
technical field [0001] The invention relates to the field of luminescent materials, in particular to a luminescent polyvinyl alcohol material and a preparation method thereof. Background technique [0002] Polyvinyl alcohol (PVA), as a naturally degradable and environmentally friendly polymer material, has the advantages of good water solubility, adhesion, flexibility, oil resistance, gas barrier and wear resistance. The series of polyvinyl alcohol synthetic materials produced as basic raw materials have broad application prospects in the fields of textiles, food, medicine, construction, papermaking, and printing. When the polyvinyl alcohol material has luminescent properties, its role in the application field will be further enhanced. For example, the luminescent polyvinyl alcohol material is an ideal functional decorative material and an important anti-counterfeiting material. However, the current luminescent polyvinyl alcohol materials have low brightness, which limits t...
Claims
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Application Information
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