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Modified polypropylene plastic and preparation method and use thereof

A technology of polypropylene plastic and polypropylene, applied in the field of modified polypropylene plastic and its preparation, can solve the problems of low sterilization efficiency and poor dispersion of PP materials, and achieve the effects of increasing dosage, improving dispersion stability, and high sterilization efficiency

Inactive Publication Date: 2012-03-28
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a modified polypropylene plastic to solve the problems of poor dispersibility and low sterilization efficiency of the above-mentioned PP materials in the prior art.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Example 1 Molecular sieve activated powder loaded ZnO modified PP plastic

[0026] First prepare a 10% (g / mL) solution of zinc chloride with deionized water, then put 50g of molecular sieve activation powder that has been dried at 300°C into a 500mL round bottom flask, and vacuumize (<9mmHg) for 2 hours. Add 300 mL of zinc chloride deionized aqueous solution into the molecular sieve to completely infiltrate the molecular sieve, stir for 3 hours, let stand for 24 hours, filter, and wash some samples with a small amount of water. Drying, a small amount of oxygen was introduced into the muffle furnace, heated to 550 ° C to constant weight, and the molecular sieve activated powder loaded with ZnO was obtained. The loading of ZnO was 23.8% (unwashed sample) and 12.9% (washed sample) by ICP analysis. ). 10 parts of molecular sieve activation powder and 100 parts of PP were melted and mixed, and hot-pressed to form a film. The thin film sample was subjected to antibacterial ...

Embodiment 2

[0027] Example 2 Molecular sieve activated powder loading ZnO / TiO 2 Modified PP plastic

[0028] First prepare a 10% (g / mL) solution of zinc acetate with deionized water, then put 50g of molecular sieve activation powder that has been dried at 300°C into a 500mL round-bottomed flask, and vacuumize (2 Molecular sieve activation powder, ICP analysis of ZnO and TiO 2 The loadings were 6.9% and 0.1%, respectively. Melt and knead 5 parts of molecular sieve activation powder and 100 parts of PP, heat-press to form a film, and carry out antibacterial experiments in liquid medium (beef extract: peptone: NaCl: water = 1:2:1:200) for thin film samples. Thin strips of thin film samples were completely immersed in the culture medium, and cultured in a constant temperature shaker at 37°C for 18 hours under light and black cover, respectively, and then observed the clarity of the culture medium and analyzed the culture medium by ultraviolet absorption. Under the condition of no ligh...

Embodiment 3

[0029] Example 3: Molecular sieve activated powder loaded TiO 2 / ZnO modified PP plastic

[0030] First, 40g of molecular sieve activated powder that has been dried at 300°C is vacuumed for 2 hours, then 240mL of 5% (g / mL) titanium tetrachloride in absolute ethanol is added, stirred and vacuumed for 3 hours, left to stand until fully absorbed, filtered , Washed several times, check the filtrate with deionized water without precipitation, add water to the filter residue and stir for 1h, filter, wash, and dry. Bake at 100°C for 1h in a muffle furnace until constant weight at 500°C to obtain loaded TiO 2 Molecular sieve activation powder. Then load the above TiO 2 Put 30g of molecular sieve activation powder into a 500mL round-bottomed flask, vacuumize (2 / ZnO molecular sieve activation powder, ICP analysis TiO 2 and ZnO loadings were 0.2% and 7.1%, respectively. Melt and knead 15 parts of molecular sieve activation powder and 100 parts of PP, heat-press to form a fi...

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Abstract

The invention discloses modified polypropylene (PP) plastic and a preparation method and use thereof. The modified polypropylene plastic is formed by melting and blending polypropylene with ZnO, ZnO / TiO2 or TiO2 / ZnO loaded molecular sieve activated powder. The preparation method of the modified plastic comprises: subjecting a precursor solution of ZnO or TiO2 and molecular sieve activated powder to reduced-pressure absorption reaction; loading the ZnO2 or TiO2 on a molecular sieve activated carrier by high-temperature firing; repeating the loading step to obtain ZnO / TiO2 or TiO2 / ZnO loaded molecular sieve activated powder; and melting and blending the ZnO / TiO2 or TiO2 / ZnO loaded molecular sieve activated powder with polypropylene. The modified polypropylene plastic disclosed by the invention has good killing effect on staphylococcus aureus, Escherichia coli and the like, has much obvious antibacterial effect in a dark environment than simple pure nano TiO2 modified PP under the same conditions, has much higher ultraviolet aging resistance than PP or PP inorganic particle composite material, and can be used for preparing all-weather antibacterial and anti-aging materials.

Description

technical field [0001] The invention relates to the technical field of modified polypropylene plastics, in particular to a modified polypropylene plastic with antibacterial and anti-ultraviolet aging functions, a preparation method and application thereof. Background technique [0002] The functionalization of polypropylene (PP) in terms of antibacterial and anti-ultraviolet aging can expand its application in the fields of home appliances and outdoor materials, which has far-reaching significance for the sustainable development of PP materials. [0003] Fungicides are mainly divided into two categories: organic fungicides and inorganic fungicides. Traditional organic fungicides have high efficiency, but have poor thermal stability and durability, are difficult to withstand the high processing temperature of PP, and have certain toxicity. Although Ag-based inorganic fungicides have a good bactericidal effect, they are expensive and the products are easily colored. Nano-TiO...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08K9/00C08K3/22C08K3/34
Inventor 李谷江娟黎力华
Owner SUN YAT SEN UNIV
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