The Investigation about the Shape Memory Behavior of Wool

Hu, Jin Lian; Dong, Zheng E; Liu, Yan; Liu, Yi Jun

doi:10.4028/www.scientific.net/ast.60.1

Cited by 7 publications

(4 citation statements)

References 12 publications

(28 reference statements)

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“…Huang et al also investigated the influence of HSC on temperature-sensitive WVP [61]. The influence of hydrophilic groups and crystalline soft segments on the WVP of SMPU film [58,62] was studied by Mondal and Hu [57]. It was reported that the WVP increased with the increase of PE glycol due to the enhanced hydrophilicity.…”

Section: Smart and Interactive Textilesmentioning

confidence: 99%

Shape Memory Polymers in Textiles

2012

Advances in Science and Technology

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This paper highlight the most important areas and directions of shape memory polymers in textiles. The textiles of shape memory polymers involve fibre spinning (including wet-spinning, melt-spinning and electro-spinning), fabric, smart apparel, actively finishing technology and WVP investigation. Based on the molecular structure of shape memory polymer, the shape memory transformation from polymer to textiles and application theory are illustrated and stated. Additionally, the challenges of shape memory polymers in textiles are pointed out and some research directions are also suggested in this paper.

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Section: Smart and Interactive Textilesmentioning

confidence: 99%

Shape Memory Polymers in Textiles

2012

Advances in Science and Technology

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“…Alternatively, in an analogy of structural components to synthetic SMPs, many natural polymers, in particular protein-type biopolymers, are capable of undergoing intelligent adaptations and responses to environmental stimuli through a long history of evolution/selection under ecological conditions [ 18 , 19 , 20 , 21 , 22 ]. For example, recently, peacock tail convert feathers and spider silk, both containing β-folded protein molecular chains, were reported to have obvious water-sensitive SME [ 18 , 23 ].…”

Section: Introductionmentioning

confidence: 99%

Shape Memory Investigation of α-Keratin Fibers as Multi-Coupled Stimuli of Responsive Smart Materials

Xiao

Gui

et al. 2017

Polymers

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Like the water responsive shape memory (SM) effect of β-keratin bird feathers, α-keratin hairs either existing broadly in nature are found responsive to many types of coupled stimuli in SM behaviors. In this article, α-keratin hairs were investigated for the combined stimuli of thermo-solvent, solvent-solvent, and UV (radiation)-reductant sensitive SM abilities. The related netpoints and switches from the hair molecular networks were identified. The experimental results showed that α-keratin hairs manifested a higher ability of shape fixation under thermal stimulus followed with the stimuli of solvent and UV-radiation. Shape recovery from the hair with a temporarily fixed shape showed a higher recovery ability using solvent than the stimuli of heat and UV-radiation. The effects of coupled stimuli on hair's shape fixation and recovery and on variations of the crystal, disulfide, and hydrogen bonds were studied systematically. A structural network model was thereafter proposed to interpret the multi-coupled stimuli sensitive SM of α-keratin hair. This original study is expected to provide inspiration for exploring other natural fibers to reveal related smart functions and for making more types of remarkable adapted synthetic materials.

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“…1 demonstrates the design rule and work principle for the synthetic SMP systems. In the last five years, natural fibers and bio-inspired polymers based on the β-folded protein chains of spider silk as net-point 16 17 , or coating SMP finishing agent on the natural fibers 18 for SME were reported. In analogous manner to synthetic/semi-natural shape memory materials, many natural biological materials, in particular biopolymers, are capable of undergoing intelligent adaptations and responses to environmental stimuli 19 20 21 22 through long-period evolution/selection under ecological conditions 23 24 .…”

mentioning

confidence: 99%

Animal Hairs as Water-stimulated Shape Memory Materials: Mechanism and Structural Networks in Molecular Assemblies

Xiao

2016

Sci Rep

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Animal hairs consisting of α-keratin biopolymers existing broadly in nature may be responsive to water for recovery to the innate shape from their fixed deformation, thus possess smart behavior, namely shape memory effect (SME). In this article, three typical animal hair fibers were first time investigated for their water-stimulated SME, and therefrom to identify the corresponding net-points and switches in their molecular and morphological structures. Experimentally, the SME manifested a good stability of high shape fixation ratio and reasonable recovery rate after many cycles of deformation programming under water stimulation. The effects of hydration on hair lateral size, recovery kinetics, dynamic mechanical behaviors and structural components (crystal, disulfide and hydrogen bonds) were then systematically studied. SME mechanisms were explored based on the variations of structural components in molecular assemblies of such smart fibers. A hybrid structural network model with single-switch and twin-net-points was thereafter proposed to interpret the water-stimulated shape memory mechanism of animal hairs. This original work is expected to provide inspiration for exploring other natural materials to reveal their smart functions and natural laws in animals including human as well as making more remarkable synthetic smart materials.

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The Investigation about the Shape Memory Behavior of Wool

Cited by 7 publications

References 12 publications

Shape Memory Polymers in Textiles

Shape Memory Polymers in Textiles

Shape Memory Investigation of α-Keratin Fibers as Multi-Coupled Stimuli of Responsive Smart Materials

Animal Hairs as Water-stimulated Shape Memory Materials: Mechanism and Structural Networks in Molecular Assemblies

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