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Method for preparing nano-selenium/attapulgite composite antibacterial material from olive leaf extract

A technology of olive leaf extract and attapulgite, applied in botany equipment and methods, chemicals for biological control, nanotechnology for materials and surface science, etc., to achieve good stability and excellent broad-spectrum antibacterial Activity and antioxidant activity, the green effect of the preparation process

Active Publication Date: 2022-05-27
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no report on the synthesis of attapulgite-loaded nano-selenium composites from olive leaf extracts

Method used

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  • Method for preparing nano-selenium/attapulgite composite antibacterial material from olive leaf extract
  • Method for preparing nano-selenium/attapulgite composite antibacterial material from olive leaf extract
  • Method for preparing nano-selenium/attapulgite composite antibacterial material from olive leaf extract

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] 1) Add 2.5 g of olive leaf powder to 100 mL of water, extract in a water bath at 65°C for 1 hour, and filter to obtain a solution of olive leaf extract; 2) Disperse 0.4 g of attapulgite into 50 mL of olive leaf extract solution under stirring, and ultrasonically treat it Then, 50 mL of sodium selenite solution was added dropwise to obtain a precursor mixture with a concentration of 0.005mol / L of sodium selenite; 3) The above precursor mixture was placed in a shaker at 100 rpm and reacted at room temperature for 48 hours; the obtained product was centrifuged and washed three times, vacuum After drying at 35℃ for 10h, the nano-selenium / attapulgite composite antibacterial material was obtained.

Embodiment 2

[0035] 1) Add 5 g of olive leaf powder to 100 mL of water, extract in a water bath at 70°C for 1 hour, and filter to obtain a solution of olive leaf extract; 2) Disperse 0.45 g of attapulgite into 80 mL of olive leaf extract solution under stirring, and after ultrasonic treatment 50 mL of sodium selenite solution was added dropwise to obtain a precursor mixture with a concentration of 0.01 mol / L of sodium selenite; 3) The above precursor mixture was placed in a shaker at 130 rpm and reacted at room temperature for 24 hours; the obtained product was centrifuged and washed three times, and vacuum 40 After drying at ℃ for 12 h, the nano-selenium / attapulgite composite antibacterial material was obtained.

Embodiment 3

[0037] 1) Add 10 g of olive leaf powder to 100 mL of water, extract in a water bath at 70°C for 1 hour, and filter to obtain a solution of olive leaf extract; 2) Disperse 0.65 g of attapulgite into 100 mL of olive leaf extract solution under stirring, and after ultrasonic treatment 50 mL of sodium selenite solution was added dropwise to obtain a precursor mixture with a concentration of 0.02mol / L of sodium selenite; 3) The above precursor mixture was placed in a shaker at 150 rpm and reacted at room temperature for 12 h; the obtained product was centrifuged and washed three times, and vacuum 40 After drying at ℃ for 13 h, the nano-selenium / attapulgite composite antibacterial material was obtained.

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Abstract

The invention discloses a method for preparing a nano-selenium / attapulgite composite antibacterial material by using an olive leaf extract, which comprises the following steps: dispersing olive leaf powder in water, heating in a water bath to extract active substances, and filtering to obtain an olive leaf extract solution; the preparation method comprises the following steps: adding attapulgite powder into an olive leaf extract under stirring, carrying out ultrasonic treatment, dropwise adding a sodium selenite solution, carrying out a reaction at room temperature for 12-72 h, carrying out centrifugal washing on the obtained product, and carrying out vacuum drying to obtain the nano-selenium / attapulgite composite antibacterial material. The composite antibacterial material obtained by the invention is environment-friendly and high in biocompatibility, shows relatively good antibacterial activity on gram-negative bacteria and gram-positive bacteria, has relatively strong scavenging capacity on free radicals, and can be used as an antibacterial material for healthy breeding of animals.

Description

technical field [0001] The invention belongs to the technical field of nano-composite material preparation, and in particular relates to a method for preparing nano-selenium / attapulgite composite antibacterial material by using olive leaf extract. Background technique [0002] Selenium is one of the essential trace elements in the human body and animals. As an important component of glutathione peroxidase in the body, it participates in the body's endocrine, inflammatory response, immunity, reproduction and other physiological processes. Studies have shown that adding an appropriate amount of selenium to livestock and poultry diets can improve growth performance and increase the deposition of selenium in tissues such as muscle, which can produce selenium-enriched animal products. Inorganic selenium and organic selenium are the main forms of selenium in nature. Inorganic selenium includes selenate, selenite and selenium oxide; organic selenium mainly exists in green vegetabl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N65/08A01N59/02A01N25/08A01P1/00C01B19/02B82Y30/00B82Y40/00
CPCA01N65/00A01N65/08A01N59/02A01N25/08C01B19/02B82Y30/00B82Y40/00Y02A50/30
Inventor 杨芳芳王爱勤惠爱平汪琴王晓梅牟斌
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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