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Beijing, China

Shi S.,Beijing University of Chemical Technology | Wang X.,Beijing University of Chemical Technology | Sun Y.,Beijing University of Chemical Technology | Sun Y.,CAS Institute of Chemistry | And 4 more authors.
Journal of Materials Chemistry | Year: 2012

In this communication, we present the first example of a donor-acceptor porphyrin-containing conjugated copolymer, PCTTQP, with absorption over the entire spectrum of visible light. The BHJ solar cells based on PCTTQP:PC 71BM blends displayed a PCE of 2.5%, which is the highest value in porphyrin-based conjugated polymers. © 2012 The Royal Society of Chemistry. Source

Liu D.-K.,China Textile Academy
Wool Textile Journal | Year: 2013

Due to the erosion of acid, alkali and reductant-oxidant, the structure and physicalchemical properties of fiber change during the decolouring process of colored cashmere. Therefore the physical-chemical properties of decolorant cashmere were investigated in the paper. The experiments showed that after decolorization processing, whiteness of fiber was improved remarkablely, fiber scale layers damaged slightly but clearly visible, the physical and mechanical properties of fiber such as breaking strength, fiber elongation, brief fiber quotiety, average diameter and length were slightly changed. The initial dyeing rate of decolorant cashmere by reactive dyes was slightly increased and the equilibrium dyeing rate declined. The research results indicated that the dyeing property were effectively improved by increasing acid amount, enhancing the post-dyeing washing, adding wet rubbing fastness improver and adjusting the decoloring process. Source

Liu D.-K.,China Textile Academy
Wool Textile Journal | Year: 2013

In all of the animal fibers, quite a few are provided with natural colors, specially some special types produced in China, such as purple cashmere, grey cashmere,yak hair,camel hair. They are valuable in the international market, but their natural colors have limited their exploitation in design and color. Purple cashmere was decolored by the method of mordant-oxidation-deoxidation, and on the basis of the whiteness index and alkali solubility determination of the decolored fibers, the influence of agent dosage and the treatment conditions on decoloring was studied carefully. Decolourization process it goes on to be relatively a large amount of batch process at foundation that lab scale succeed. After times of experiments in factories, different kinds of decoloring method were discovered in bleaching purple cashmere, grey cashmere. Source

Ye P.,Zhejiang Normal University | Xie J.,Zhejiang Normal University | He Y.,Zhejiang Normal University | Zhang L.,Zhejiang Normal University | And 3 more authors.
Materials Letters | Year: 2013

Flowerlike bismuth oxychloride (BiOCl) was successfully synthesized by a simple and reliable template free hydrolytic method using Bi(NO 3)35H2O as Bi source material at room temperature. The as-prepared samples were characterized by X-ray diffraction, field emission scanning electron microscope and UV-vis absorption spectrophotometer. The results indicated that the as-prepared BiOCl sample is self-assembled hierarchically with nanosheets. During the assembly of the BiOCl from nanosheets to microflowers, the reaction time plays an important role. The flower-like BiOCl showed much higher photocatalytic activity than commercial TiO2 (P25) in the degradation of Rhodamine B (RhB) dye under visible light irradiation due to its special structure. © 2013 Elsevier B.V. Source

Ren W.,Georgia Institute of Technology | Ren W.,China Textile Academy | Griffin A.C.,Georgia Institute of Technology
Physica Status Solidi (B) Basic Research | Year: 2012

Liquid crystalline networks (LCNs) are described in which there is anelasticity in strain recovery response (under zero load) after uniaxial tensile loading. This strain retention is shown as a function of time after release of load and is further characterized by thermal, X-ray, and stress/strain experiments. It was found that, at temperatures in the smectic phase far below the isotropization temperature, this LCN film retains significant levels of strain when in the monodomain state. On free recovery (zero load) of the LCN film there is a rapid elastic response followed by a slow anelastic response for those films that had undergone a polydomain-to-monodomain transition during the initial imposed strain regimen. It is postulated that the mechanism leading to the strain retention involves nanosegregation-driven pinning of unfolded hairpins in shallow energy wells and that this effect is responsible for the thermally activated recovery of strain (shape memory) at elevated temperatures. © 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. Source

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