PVA-based composite material and precursor thereof, remolded product, composite hydrogel, and composite film and preparation and application thereof

A composite hydrogel and composite material technology, which is applied in the field of PVA-based composite materials and their precursors, can solve problems such as toughness and other mechanical properties that cannot meet the requirements
CN110358099AActive Publication Date: 2019-10-22JILIN UNIV
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
JILIN UNIV
Publication Date
2019-10-22

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Abstract

The invention discloses a PVA-based composite material and a precursor thereof, a remolded product, a composite hydrogel, and a composite film and preparation and application thereof. A preparation method for the precursor of the PVA-based composite material comprises the following steps: precipitating a solution obtained by uniformly mixing an aqueous solution of polyvinyl alcohol and an aqueoussolution of tannic acid, and separating and collecting a precipitate, wherein amass ratio of tannic acid to polyvinyl alcohol is 0.016: 1 or above. The composite material, composite hydrogel and composite film provided by the invention have the advantages of enhanced strength, greatly improved toughness and the like, and also have water processing properties, ultraviolet light absorption performance, fresh-keeping performance, easy degradation performance and remodelability.
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Description

technical field

[0001] The invention relates to a PVA-based composite material and its precursor, a remodeling product, a composite hydrogel, a composite film and its preparation and application. Background technique

[0002] Utilize TA (tannic acid) to improve the method of PVA (polyvinyl alcohol) toughness at present not much, because PVA mostly is crystalline polymer, so the PVA composite material after utilizing the TA modification of prior art report also basically all is Crystalline products.

[0003] For example, Yu Guan et al. (Yu Guan, Bio-inspired natural polyphenol cross-linkingpoly (vinyl alcohol) films with strong integrated strength and toughness, RSCAdvances., 2016, 6, p69966) published a method for improving the toughness of PVA by using TA , which added the TA solution into the PVA solution dropwise, and evaporated the water at 40° C. to obtain the TA-PVA composite film. The mass of TA added in the composite film accounts for 1% to 10% of the mass of PVA. ...

Claims

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