Neem Oil Microcapsules for Wash-Resistant Bioactive Textiles
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Solution Overview
Problem
Current acaricidal compounds for textile materials are toxic and have ecological drawbacks, and Neem oil, despite being biodegradable, is unsuitable due to its odor, rapid oxidation, UV degradation, and incompatibility with washing and drying processes.
Innovation Solution
Microencapsulating Neem oil in polymeric walls to create stable microcapsules that maintain acaricidal and microbicidal properties, allowing for effective treatment of textiles while overcoming the limitations of Neem oil, including odor masking and resistance to washing and high temperatures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If Neem oil is used for acaricidal treatment of textile materials, then the treatment is non-toxic and biodegradable, but the Neem oil has repugnant odor, rapid oxidation, UV degradation, and degradation in contact with water
Solution Approach 1:
The patent applies microencapsulation by enveloping Neem oil in polymeric microcapsule shells. This flexible shell structure protects the Neem oil from oxidation, UV light, and water while containing the odor, allowing the oil to be applied to textiles without its harmful properties manifesting. The microcapsules release the oil gradually or upon mechanical rupture during washing.
Solution Approach 2:
The patent changes the physical state and delivery parameters of Neem oil by transforming it from bulk liquid form into microencapsulated particles. This parameter change allows the oil to withstand processing temperatures, resist degradation during storage, and control its release behavior on textile materials, thereby overcoming its inherent instability and odor issues.
2Reliability
If Neem oil is applied to textile materials, then the treatment provides acaricidal properties, but the active compounds degrade under ultraviolet light and at temperatures higher than 65° C., making them incompatible with machine washing and drying
Solution Approach 1:
The patent applies beforehand cushioning by pre-protecting the Neem oil with polymeric microcapsule shells before application to textiles. This protective shell cushions the oil against subsequent exposure to high temperatures during machine drying and UV light during use, preventing degradation before it occurs and maintaining acaricidal efficacy through multiple wash cycles.
3Reliability
If current acaricidal compounds of perithrenoid type are used, then the treatment is effective against mites, but the compounds have toxicity and deleterious ecological effects since they are not biodegradable
Solution Approach 1:
The patent changes the chemical parameter of the acaricidal agent by replacing synthetic perithrenoid compounds with natural Neem oil, which has different biodegradability and toxicity parameters. Neem oil maintains effectiveness against mites while being non-toxic to mammals, fish, birds, and bees, and is fully biodegradable, thus resolving the contradiction between effectiveness and ecological safety.
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 provides long-lasting, non-toxic, and eco-friendly acaricidal and microbicidal properties to textiles, maintaining efficacy through multiple washes and high-temperature drying, with laboratory tests showing 90% mite mortality after three weeks and 100% after four weeks, and no toxicity to mammals, fish, birds, or bees.
Implementation Method 1
Microencapsulating liquid or solid substances, imprisoning such substances in microcapsules with polymeric walls
Implementation Method 2
microcapsules containing Neem oil are fixed to a textile material
Data Source
AI summary
The present invention concerns a method of agaricidal and microbicidal treatment of textile materials, a Neem oil microcapsule composition specifically for said treatment and a bioactive textile material obtained. More particularly, the present invention concerns the industrial and commercial areas of the treatment of fabrics and like products and is of particular application to textile materials produced from natural fibers such as cotton, feathers or down, or synthetic fibers such as polyester, nylon, acrylic or the like, or mixed fibers such as polyester-cotton. The present invention concerns a method of agaricidal and microbicidal treatment of a textile material, in which microcapsules containing Neem oil are fixed on said textile material.