Diatomite-based plant antibacterial composite material and preparation method thereof

A plant antibacterial and composite material technology, which is applied in botany equipment and methods, plant growth regulators, chemicals for biological control, etc., can solve the problems of insufficient development and application, poor persistence, high toxicity, etc., and achieve relief Effects of environmental stress, maintenance of antibacterial ability, and simple method

Inactive Publication Date: 2018-07-24
CHINA BUILDING MATERIALS ACAD
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  • Abstract
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  • Claims
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Problems solved by technology

[0003] The existing antibacterial materials are mainly divided into three categories: the first category is inorganic antibacterial materials, mainly oxide photocatalytic materials and metal ion metal oxide types, which have broad-spectrum antibacterial, long-term effect, no drug resistance, heat resistance The second type is organic antibacterial materials, mainly including quaternary ammonium salts, quaternary phosphonium salts, biguanides, alcohols, phenols, organic metals, pyridines, imidazoles, antibacterial aging Good antibacterial properties, but there are problems such as high toxicity, poor persistence, and drug resistance; the third category is natural antibacterial materials, including natural antibacterial materials from plant sources, animal sources, and microbial sources. The natural antibacterial materials that are currently used mainly include The chitin, chitosan and insect antibacterial protein extracted from the

Method used

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preparation example Construction

[0032] A kind of preparation method of diatomite-based plant antibacterial composite material that one embodiment of the present invention proposes, it comprises:

[0033] Diatomite modification: mix diatomite with aluminum salt solution, stir, add sodium hydroxide solution drop by drop, filter, dry at 50-80°C for 3-10h, and grind to obtain modified diatomite;

[0034] Extraction of natural antibacterial plants: crush natural antibacterial plants and pass through a 80-300 mesh sieve to obtain dry powder; ultrasonically extract the dry powder with a volume fraction of 50-70% ethanol aqueous solution for 20-60 minutes, filter, and concentrate under reduced pressure at 50-80°C to constant heavy, to obtain antibacterial plant extracts;

[0035] Loading: Mix the modified diatomaceous earth, antibacterial plant extract and water in a weight ratio of 1:0.125-1:20-50, stir at 300-800rpm for 0.5-7h, filter, and dry at 50-80°C for 3- After 10 hours, the diatomite-based plant antibacter...

Embodiment 1

[0045] A kind of preparation method of diatomite-based plant antibacterial composite material that one embodiment of the present invention proposes, it comprises:

[0046] Diatomite modification: weigh 23.8g Al(NO 3 ) 3 9H 2 Disperse O in 500mL deionized water, stir until completely dissolved, add 10g of diatomaceous earth, and stir evenly with a magnetic force; weigh 4.8g NaOH and disperse in 300mL deionized water, stir until completely dissolved to obtain a sodium hydroxide solution; The sodium oxide solution is added dropwise to the mixed solution of diatomaceous earth and aluminum nitrate to obtain a mixed suspension; the mixed suspension is vacuum filtered to obtain the first filter cake, and the first filter cake is dried in a blast drying oven at a drying temperature of 60°C, and then grind the completely dried first filter cake to obtain modified diatomite.

[0047] Natural antibacterial plant extraction: crush the pomegranate peel and pass it through a 200-mesh sie...

Embodiment 2

[0052] A kind of preparation method of diatomite-based plant antibacterial composite material that one embodiment of the present invention proposes, it comprises:

[0053] Diatomite modification: weigh 23.8g Al(NO 3 ) 3 9H 2 Disperse O in 500mL deionized water, stir until completely dissolved, add 10g of diatomaceous earth, and stir evenly with a magnetic force; weigh 4.8g NaOH and disperse in 300mL deionized water, stir until completely dissolved to obtain a sodium hydroxide solution; The sodium oxide solution is added dropwise to the mixed solution of diatomaceous earth and aluminum nitrate to obtain a mixed suspension; the mixed suspension is vacuum filtered to obtain the first filter cake, and the first filter cake is dried in a blast drying oven at a drying temperature of 60°C, and then grind the completely dried first filter cake to obtain modified diatomite.

[0054] Natural antibacterial plant extraction: crush the pomegranate peel and pass it through a 200-mesh sie...

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Abstract

The invention relates to a diatomite-based plant antibacterial composite material and a preparation method thereof. The preparation method comprises the following steps: modifying diatomite: mixing diatomite and an aluminum salt solution, stirring, adding a sodium hydroxide solution, filtering, drying and grinding to obtain modified diatomite; extracting a natural antibacterial plant: pulverizingand sieving the natural antibacterial plant to obtain dry powder; performing ultrasonic extraction on the dry powder by an ethanol aqueous solution, filtering and concentrating to obtain an antibacterial plant extract; loading: mixing the modified diatomite, the antibacterial plant extract and water, stirring, filtering and drying to obtain a diatomite-based plant antibacterial composite material.The diatomite-based plant antibacterial composite material utilizes a natural plant antibacterial agent, and the method is simple, environmentally friendly, non-toxic and low in production cost.

Description

technical field [0001] The invention relates to the field of antibacterial materials, in particular to a diatomite-based plant antibacterial composite material and a preparation method thereof. Background technique [0002] Due to the relatively closed indoor environment, the extensive use of air conditioners and keeping pets, it is easy to cause a large number of microorganisms to breed, so indoor microbial pollution is becoming the main factor that endangers health. Adding antibacterial function to various building materials and household appliances and other daily products can effectively solve the problem of inhibiting the growth and infection of microorganisms. Research and development of new, efficient, non-toxic and durable antibacterial materials has practical significance and broad market prospects. [0003] The existing antibacterial materials are mainly divided into three categories: the first category is inorganic antibacterial materials, mainly oxide photocataly...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N25/08A01N65/08A01P1/00A01P3/00
CPCA01N25/08A01N65/00A01N65/08
Inventor 王静赵宇翔冀志江赵春艳
Owner CHINA BUILDING MATERIALS ACAD
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