Changes induced in silk‐like polyester properties by alkoxides treatment

Zhou

J of Applied Polymer Sci

et al. 2013

Biomedical polyurethane (BPU) and silk fibroin have similarly molecular architecture in their primary and aggregate structure, both of which have amide bonds and microphase separation, and they have been employed as scaffold materials for biomedical applications. Based on this, as the featured peptide sequence of silkworm silk fibroin, GlycineAlanineGlycineAlanine (GlyAlaGlyAla) tetrapeptide was synthesized by using traditional liquid-phase peptide synthesis method with Boc-protected glycine and alanine as starting materials, and was transformed to its derivative with two amine-terminated functional groups. The derivative was introduced as a chain extender into the backbone to form the hard segment of a silk-inspired PU with urea-linkage. Related measurements show that molecular weight of the synthesized silk-inspired PU ranged from 13,000 to 15,000. Fourier transform infrared (FTIR) absorption bands of Amides I and II are at 1651 cm À1 and 1534 cm À1 , and Raman absorption band of Amide III is at 1302 cm À1 . UV-Vis absorption peak of the silk-inspired PU is at 266 nm. This new concept and strategy may allow the fabrication of a new class of thermoplastic polyurethane elastomers to mimic the structure and properties of silk fibroin of silkworms and spiders. Information provided by this study may be used to better understand the correlation between the natural and man-made materials.

Section: Introductionmentioning

confidence: 98%

Silk‐inspired polyurethane containing GlyAlaGlyAla tetrapeptide. II. physical properties and structure

Zhou

J of Applied Polymer Sci

et al. 2013

J of Applied Polymer Sci

“…Moisture-permeable, waterproof, softness, and smoothness high-density woven fabrics are used in the garment area. 1,2 Not surprisingly, the physical and mechanical properties of these various microfibers are quite different from those of conventional fibers, and this is particularly true of their dyeing characteristics. 3 The surface of polymer microfiber increases markedly with decreasing filament linear density.…”

Section: Introductionmentioning

confidence: 97%

Shade darkening effect of polyorganosiloxane modified with amino and hydroxy groups on dyed polyester microfiber fabric

Xie

Jiang

2007

The novel polyorganosiloxane material S-101 modified with amino and hydroxy groups is synthesized. Shade darkening effect of modified polyorganosiloxane on dyed polyester microfiber fabric is investigated by reflectance spectrum, color yield (K/S), and the color differences (DE). The colorimetric data of CIELAB is discussed. The results show that the novel material of silicone polymer modified with amino and hydroxy groups has excellent shade darkening effect on dyed polyester microfiber fabric. The rates of the color yield increase (I%) of all dyed fabric with four dyes (Disperse Yellow S-4RL, Red GS, Blue 2BLN, and Black SF-R) exceed 10%. The shapes of the reflectance spectra curves of the dyed fabrics before and after treated with S-101 are not noticeable change. The dyed fabrics with the polymer have not significant effect on the wash fastness and wet rubbing fastness. The low reflectance thin film on dyed fabrics is formed.

Journal of Dispersion Science and Technology

“…The improved orientation of aminofunctional silicone leads to an extremely soft handle. [9][10][11] When the polyorganosiloxane is modified with amino and hydroxy groups, the modified polyorganosiloxane could form thin film of low reflectance index to change material surface properties. The low reflectance material has wide application in the color fields.…”

Section: Introductionmentioning

confidence: 99%

Preparation and Properties of the Emulsions of the Polysiloxane Material Modified with Tertiary Amino Side Chain

Xie

Chen

Hou

et al. 2009

A series of the polysiloxane materials modified with tertiary amino groups were synthesized. FTIR, 1 H NMR were used to characterize the polysiloxane structure. The emulsions of the modified polysiloxanes are prepared. Some surface properties of the polysiloxane materials with tertiary amino groups as resins were discussed. The results show that the polysiloxane materials modified with tertiary amino side chains had good flexibility and the repellency to water. With increasing the amino value of the polysiloxanes, the flexibility of the fabrics treated with the emulsion was improved. After the samples treated with the polysiloxanes, the thermal yellowing of the polysiloxane had emerged. The whiteness of fabrics treated with the polysiloxane decreased. The K/S of the yellow fabrics treated with the modified polysiloxanes had not obvious change, the K/S of the red and blue fabrics treated with the modified polysiloxanes slightly decreased. The shapes of the reflectance spectra curves of the dyed fabrics treated without and with the modified polysiloxanes had not noticeable change.