Attapulgite-Based pH-Responsive Antibacterial Material
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Natural aldehyde-based antibacterial agents used in animal feed face issues of easy oxidization, strong volatility, and pungent odor, necessitating the development of a more stable and efficient alternative for livestock and poultry breeding.
Innovation Solution
A method is developed to prepare an attapulgite-based pH-responsive antibacterial material by spraying natural aldehyde-based antibacterial agents onto attapulgite powder, grinding, and reacting them with a chitosan-citric acid solution to form Schiff bases, which are then dried and sieved, enhancing stability and odorlessness while providing pH-responsive sustained release.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If natural aldehyde-based antibacterial agents are used in animal feed, then good antibacterial effect is achieved, but easy oxidization, strong volatility and pungent odor occur
Solution Approach 1:
The natural aldehyde-based antibacterial agent is enclosed within the porous structure of attapulgite particles, creating a nested configuration where the active ingredient is housed inside the carrier matrix. This nesting approach protects the aldehyde from environmental exposure, reducing oxidization and volatility while maintaining antibacterial efficacy.
Solution Approach 2:
The invention creates a composite material system combining attapulgite (carrier) with natural aldehyde-based antibacterial agent (active ingredient), forming an integrated antibacterial formulation. This composite structure leverages the stabilizing properties of attapulgite to mitigate the harmful characteristics of pure aldehydes while preserving their antibacterial function.
2Object-generated harmful factors
If aldehydes are stabilized through attapulgite pores, then volatility and odor are reduced, but sustained release and pH-responsiveness are not achieved
Solution Approach 1:
Chitosan serves as an intermediary substance coating the attapulgite particles, introducing pH-responsive functionality to the system. The chitosan layer responds to pH changes in the gastrointestinal tract, enabling sustained and targeted release of the aldehyde antibacterial agent at appropriate locations and times, thereby achieving both odor reduction and controlled release.
Solution Approach 2:
The invention exploits pH parameter changes in the gastrointestinal environment to trigger controlled release of the antibacterial agent. The chitosan-coated attapulgite structure remains stable at certain pH levels but releases the encapsulated aldehyde when exposed to specific pH conditions, achieving pH-responsive sustained release while maintaining stability during storage and administration.
3Duration of action of moving object
If chitosan is added to achieve pH-responsiveness, then sustained release is improved, but manufacturing complexity increases
Solution Approach 1:
The chitosan coating is applied in advance to the attapulgite particles during the manufacturing process, creating a pre-functionalized carrier system. This preliminary action integrates the pH-responsive functionality into the carrier structure before final formulation, simplifying subsequent processing and ensuring consistent release characteristics without requiring complex post-manufacturing modifications.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The method effectively stabilizes aldehyde-based antibacterial agents, eliminating volatility and pungency, and exhibits strong antibacterial activity against both Gram-negative and Gram-positive bacteria, making them suitable for use as animal feed additives in safe animal breeding.
Implementation Method 1
the principle of forming Schiff bases between amino groups of chitosan and aldehydes
Implementation Method 2
organic molecules could be resided in the pores of attapulgite under the mechanochemical action
Data Source
AI summary
Disclosed is a method for preparing an attapulgite-based pH-responsive antibacterial material, including: directly spraying a natural aldehyde-based antibacterial agent onto an attapulgite powder under stirring, and constantly stirring the attapulgite powder for 20-30 min; grinding the attapulgite powder in a ball mill for 30-60 min to obtain a ground attapulgite powder; placing the ground attapulgite powder in a stirred tank, and spraying a chitosan-citric acid aqueous solution onto the ground attapulgite powder; after spraying, constantly stirring the ground attapulgite powder for 30-120 min; and finally drying the ground attapulgite powder to obtain a dried attapulgite powder, sieving the dried attapulgite powder to obtain a sieved attapulgite powder, and packaging the sieved attapulgite powder to obtain the antibacterial material.