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RISS 인기검색어
- 검색키워드
- 저자 : Aiqin Gao (검색결과 4 건)
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Tianpeng Gao,Wenbo Wang,Aiqin Wang 한국고분자학회 2011 Macromolecular Research Vol.19 No.7
New pH-sensitive composite hydrogels were synthesized by free-radical graft copolymerization among sodium alginate (NaAlg), sodium acrylate (NaA), and medical stone (MS). Fourier transform infrared spectroscopy (FTIR), field emission scanning electron microscopy (FESEM), tronsmission electron microscopy (TEM), and thermogravimetric analysis (TGA) analyses confirmed that NaA was grafted onto the NaAlg chains and MS participate in polymerization by its active silanol groups, and the surface morphologies and thermal stability was clearly improved after incorporating MS. The swelling capacity and rate of the hydrogel were clearly enhanced by introducing MS, and the intriguing deswelling in gelatin solution and “overflowing” behaviors in dimethyl sulfoxide (DMSO) and glycerin solutions were observed. In addition, the composite hydrogels exhibited excellent adsorption capacity on heavy metal ions, which enhanced the adsorption of Ni2^+, Cu2^+, Zn2^+ and Cd2^+ ions by 10.4, 8.0, 23.0,and 14.3 fold compared to active carbon (AC), and by 17.3, 16.0, 38.3 and 23.8 fold compared to MS, respectively. The biopolymer-based composite hydrogel can be used as a potential water-saving material and candidate of AC for heavy metal removal.
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Hongjuan Zhang,Aiqin Gao,Kongliang Xie,Aiqin Hou 한국섬유공학회 2019 Fibers and polymers Vol.20 No.10
The effect of calcium chloride on dyeing property of polyamide 66 based on reactive anthraquinone dyes withdifferent structures were investigated. The relationship of the structure and properties of the reactive anthraquinone dyes wasdiscussed. Calcium chloride could obviously improve the exhaustion and fixation of the reactive dyes on polyamide 66. Thedyes with more sulfonate groups exhibited obviously sensitive to calcium chloride. Compared with the traditional dyeingmethod, three reactive anthraquinone dyes achieved better building up property and color yields by using calcium chloride atpH value of 7.0. Calcium chloride had obvious dyeing acceleration for polyamide 66. The anthraquinone dye withbifunctional groups could achieve higher exhaustion and excellent fastness on polyamide 66. The mechanism of calciumchloride to exert an influence on dyeing property of polyamide 66 was analyzed. This work is of great significance forimproving dyeing performance of reactive dyes on polyamide fiber.
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Changwu Zheng,Huijun Han,Aiqin Gao,Meng Ju,Aiqin Hou,Kongliang Xie 한국섬유공학회 2023 Fibers and polymers Vol.24 No.2
Designing photochromic molecules to improve color sensitivity and reversibility of functional materials in the solidifiedstate is still a major challenge. In this work, a series of photochromic molecules containing-spiropyran with different freevolume groups have been designed and synthesized by introducing flexible spacers. The relationship of the photosensitivityand molecular free volume was investigated and the excellent reversible photoswitching molecules in both solution andsolid state were obtained. The photosensitivity of the molecules increased with the increase of molecular free volume. Thephotochromic equilibrium time of the molecule with longer alkyl chain reduced from the 330 s to 60 s, and the recoveringequilibrium time reduced from the 480 s to 40 s. The photosensitivity enhancement mechanism was explained by densityfunctional theory and molecular volume calculations. The designed photochromic molecules were applied to polyesterfabrics. The photochromic materials with excellent photosensitivity and good reversibility were obtained, which exhibitedhigh contrast and sensitive reversible color changes. The photochromic materials have potential applications in the field ofsmart textiles, optical devices, anti-counterfeiting, etc.
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Kan Hao,Zhang Ka,Mao Aiqin,Geng Li,Gao Mengru,Feng Lei,You Qingjun,Ma Xin 생화학분자생물학회 2021 Experimental and molecular medicine Vol.53 No.-
The aorta contains numerous cell types that contribute to vascular inflammation and thus the progression of aortic diseases. However, the heterogeneity and cellular composition of the ascending aorta in the setting of a high-fat diet (HFD) have not been fully assessed. We performed single-cell RNA sequencing on ascending aortas from mice fed a normal diet and mice fed a HFD. Unsupervised cluster analysis of the transcriptional profiles from 24,001 aortic cells identified 27 clusters representing 10 cell types: endothelial cells (ECs), fibroblasts, vascular smooth muscle cells (SMCs), immune cells (B cells, T cells, macrophages, and dendritic cells), mesothelial cells, pericytes, and neural cells. After HFD intake, subpopulations of endothelial cells with lipid transport and angiogenesis capacity and extensive expression of contractile genes were defined. In the HFD group, three major SMC subpopulations showed increased expression of extracellular matrix-degradation genes, and a synthetic SMC subcluster was proportionally increased. This increase was accompanied by upregulation of proinflammatory genes. Under HFD conditions, aortic-resident macrophage numbers were increased, and blood-derived macrophages showed the strongest expression of proinflammatory cytokines. Our study elucidates the nature and range of the cellular composition of the ascending aorta and increases understanding of the development and progression of aortic inflammatory disease.
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