Research&Development On Anti-mosquito Fabrics

Nowadays, with the improvement of living standard driven by economicdevelopment, people began to pay more attention to the quality of life in pursuit ofpure natural shelter, green environmental protection, safety and health. As for allkinds of textile which close to people’s daily work and life, basic properties alreadycannot meet the needs of consumers. The functional textiles with special utility werewidely favored. In the paper, research and development of natural anti-mosquitofunctional textile was studied with natural non-toxic materials finished on fabrics,which easily kept off mosquitoes in wearing the clothes. These fabrics not only canreduce the risk of infection, but also can create a safe and healthy environment in asmall scope, which caters to people’s consumption demand and conforms to the trendof functional textiles, so it has broad market prospect, realistic significance andpractical value.In this paper, the extraction of natural anti-mosquito plants and the identificationof their effective components, the preparation of the microcapsules and the functionalfinish process were discussed. Also, the anti-mosquito effect and wearingcharacteristics of fabrics after finishing were evaluated.First of all, the extracting methods and process of volatile oil of twoanti-mosquito plants (Artemisia Argyi, Leaves of Chinaberry), the analysis ofeffective components were studied and water steam distillation&organic solventextraction was confirmed as optimized extracting method. The optimum processparameters were determined as follows: the phase ratio1:20, the distillation4h, thecrashing particle size40meshes. Under this condition, the extraction yield was0.72%.The volatile oil was determined by gas chromatography--mass spectrometry and thecontent was calculated by peak area normalization method.34components wereconfirmed. The maximum content was eucalyptol with the content of84.435%, whichwas the effective ingredient why Artemisia Argyi can keep off mosquitoes. Eucalyptolwas a kind of monocyclic monoterpenoids, which was main material of makingnatural mosquito repellent.Ethyl cellulose as cell material and composite plants extraction as core material, the W/O/W composite phases emulsion method was used to prepare anti-mosquitomicrocapsules. By single-factor and orthogonal test, the optimal process parameterswere determined as follows: the emulsifier7%, the stirring speed1500r/min, theamount of EC4.5%, the concentration of protective colloid3%. According to theparameters above, the average particle size of microcapsules was1.93μm. By SEMtest, it can be seen that the surface of microcapsules was smooth and rounder withmicro holes.The anti-mosquito microcapsule finishing agent was used to treat polyesterfabrics by dipping and the anti-mosquito effect was tested by my method. Aftersingle-factor analysis, the proper process conditions were as follows: the amount offinishing agent130%, the dipping time40min, the dipping temperature40℃. Thefinished fabrics showed that this process had a good anti-mosquito effect with67.5%repelling ratio.In order to study the influence of functional finishing, the wearing characteristicsof fabrics with best anti-mosquito effect were tested, mainly including airpermeability, thickness and breaking strength. The original style and properties offabrics were basically kept, even a certain performance has improved.