This work is devoted to the preparation of self‐adhesive microcapsules and their mechanism of mutual sway with cotton fabrics. Chitosan oligosaccharide (COS) microcapsules were prepared by ionic gelation method and encapsulated with functional substances (lavender oils) to obtain microcapsules with multiple properties (aromatic). The textile auxiliary guar gum (GG) induce the microcapsules to aggregate into a network structure, which increases the chance of microcapsule adhesion on cotton fabrics. Fe3+ further enhance the binding of microcapsules to cotton fabrics through coordination, while ethylenediaminetetraacetic acid (EDTA) can disrupt this binding, thus achieving controlled self‐adhesion. During the five self‐adhesive cycles, the weight gain rate of the microcapsules was 16.00%–17.00% and aromatic content between 0.600–0.700 mg/g when they adhered to the cotton fabric by coordination. After EDTA disrupted the adhesion of the microcapsules, the weight gain rate became 3.00%–3.50% and the content of aromatic was 0.041–0.058 mg/g. Therefore, the microcapsules prepared in this study can achieve multiple recyclable adhesion and de‐adhesion on cotton fabrics by Fe3+ and EDTA, providing new ideas for functionalization and diversification of textiles.
At present designers take little account of the different requirements of pavement performance when determining the adding ratio of lignin fibers in Chinese SMA mixture. Basing on the high temperature performance the article studied the optimum fiber content of SMA-13 mixture through comparative tests of performance. First aiming at SMA-13 mixture with different fiber contents, the mix proportions were designed and asphalt contents were verified. Then the effect of fiber content on high temperature performance was indicated through three kinds of interrelated performance tests. At last other pavement performances of SMA-13 mixture were verified. Based on the test results, an optimum fiber content of 0.33% is recommended for the lignin fibers used in this SMA-13 mixture, with which mixture poses the best high temperature performance.
The pavement performance study of bituminous mixture at surface course is very important. This paper focused on comparing the pavement performance of AC-l6C, AC-l6F, Super-12.5 and SMA-16 bituminous mixtures. First the gradations and material we used were illustrated. Then the dynamic stability, water stability and texture depth of these bituminous mixtures was tested. After comparing the test data, we found that the SMA-16 bituminous mixture has the best comprehensive pavement performance and it is most suitable for the surface layer bituminous mixture of freeways in Chinese Hubei Province. Super-12.5 and AC-l6C is applicable too, but AC-l6F is improper in this region.
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