Preparation And Properties Of Polyamide / Modified Montmorillonite Nanocomposite Fibers

Polyamide is widely used in synthetic fibre because of its light weight, satisfying extensibility, abrasion resistance and mechanical strength, particularly for civil, industry and military use. Herein, we select spinning polyamide (PA6) as the matrix and make use of near infrared camouflage function (OMMT) as additive agents to sysnthesis polyamide/modified montmorillonite nanofibers (PA6/OMMT) with near infrared camouflage function.First we choose chlorophyll-copper (Chl-Cu), the natural dyes with reflection characteristic of natural green plant. After intercalation with montmorillonite by choosing suitable solvent, it turns out that different ratios of chlorophyll-copper/ montmorillonite nanocomposites(Chl-Cu/MMT) have been synthetized. Then the microstructure and near infrared camouflage performance of nanocomposites are detected by XRD, FTIR, TG, UV-Vis-NIR, FL and DLS respectively, and its intercalation mechanism was explored.In order to improve the level-dyeing property of nanocomposites to fiber and make it easy to produce, benzalkonium chloride (1227) was introduced into the design of nanocomposite. After recombinated intercalation with montmorillonite of chlorophyll-copper and benzalkonium chloride, the series chlorophyll-copper-benzalkonium chloride/montmorillonite nanocomposites (Chl-Cu-1227/MMT) with near infrared camouflage function have been synthetized. Its structure and properties are detected by XRD, FTIR, TG, UV-Vis-NIR, FL and size distribution respectively, and its intercalation mechanism was explored. The results indicate that the obtained nanocomposites have stable structures and good performances. The nanocomposites can commendably simulate the reflection characteristics of green plants and inverse ultraviolet rays into blue-green rays and reduce damage of ultraviolet to fabric.On the base of the study mentioned above, two types of infrared camouflage functional PA6/OMMT masterbatches are prepared by using the Chl-Cu/MMT and Chl-Cu-1227/MMT nanocomposites with near infrared camouflage function and polyamide (PA6) via HAAKE torque rheometer system. The spinning experiment of PA6/OMMT masterbatches were spinned using POY-DTY production. The different contents of masterbatches were wire drawed and tracted in the paralled drawing machine to obtain silk yarn nanocomposites with different color saturation. At last, the structures and properties of nanofibers were studied by XRD, FTIR, TG, UV-Vis-NIR, FL, SEM, mechanical properties, color fastness (color fastness to rubbing, washing, light) and artifical astmosphere corrosion test.According to the studies, PA6/Chl-Cu-MMT and PA6/Chl-Cu-1227-MMT nanofibers possess good mechanical properties, heat resistance, color fastness and anti-UV function. The UV-Vis-NIK reflectance curve showed that the nanocomposites can commendably simulate the reflection characteristics of green plants which meet the needs of near infrared camouflage battle strategies in forest area and have potential in military camouflage.