Shape and Temperature Memory of Nanocomposites with Broadened Glass Transition

Miaudet, Pierre; Derré, Alain; Maugey, Maryse; Zakri, Cécile; Piccione, Patrick M.; Inoubli, Rabi; Poulin, Philippe

doi:10.1126/science.1145593

Cited by 389 publications

(346 citation statements)

References 29 publications

Supporting

Mentioning

330

Contrasting

Order By: Relevance

“…Figure 3a,b shows that a lower programming temperature has two effects: On the one hand, it results in a faster shape recovery rate. This phenomenon is referred as temperature memory effect of SMPs under free recovery condition 55,57,60 . On the other hand, however, it leads to lower shape fixity, indicating that a large portion of the programmed deformation is recovered right after unloading.…”

Section: Resultsmentioning

confidence: 99%

“…Previous experimental work revealed complicated dependency of the SM performance on thermo-temporal conditions in an SM cycle. For example, the recovery of SMPs programmed under the same conditions strongly depends on the recovery temperature and heating rate in the recovery step 43,[46][47][48][49][50][51][52] ; in addition, the programming temperature has been shown to affect significantly the free recovery behaviour for SMPs under the same thermo-temporal recovery conditions 31,[53][54][55][56][57] . To date, because the recovery behaviour of an SMP depends on the aforementioned multiple thermo-temporal input parameters, there is no clear understanding how these input parameters can affect the SM performance individually or collectively.…”

mentioning

confidence: 99%

See 1 more Smart Citation

Reduced time as a unified parameter determining fixity and free recovery of shape memory polymers

2014

Nat Commun

235

179

View full text Add to dashboard Cite

Shape memory polymers are at the forefront of recent materials research. Although the basic concept has been known for decades, recent advances in the research of shape memory polymers demand a unified approach to predict the shape memory performance under different thermo-temporal conditions. Here we report such an approach to predict the shape fixity and free recovery of thermo-rheologically simple shape memory polymers. The results show that the influence of programming conditions to free recovery can be unified by a reduced programming time that uniquely determines shape fixity, which consequently uniquely determines the shape recovery with a reduced recovery time. Furthermore, using the time-temperature superposition principle, shape recoveries under different thermo-temporal conditions can be extracted from the shape recovery under the reduced recovery time. Finally, a shape memory performance map is constructed based on a few simple standard polymer rheology tests to characterize the shape memory performance of the polymer.

show abstract

Section: Resultsmentioning

confidence: 99%

mentioning

confidence: 99%

Reduced time as a unified parameter determining fixity and free recovery of shape memory polymers

2014

Nat Commun

235

179

View full text Add to dashboard Cite

show abstract

“…76 However, one study described the production of polyvinyl alcohol fibers with 20% nanotubes having such a broadened glass transition, as measured by the storage modulus, that the value of the T g was not clear. 93 Still, the preponderance of evidence suggests that the introduction of nanotubes does not cause a wide variety of environments for the polymer chains in a dynamic sense which in turn would lead to broadening of a single transition.…”

Section: Dynamics: Glass Transition and Diffusion Coefficientmentioning

confidence: 99%

Effects of carbon nanotubes on polymer physics

Grady

2012

J Polym Sci B Polym Phys

View full text Add to dashboard Cite

A single carbon nanotube has many similarities with an individual polymer chain including the fact that the end-to-end length of both are often about the same and the diameter of the chain is about the same (for single-walled nanotubes) or only $10 to 20 times larger (for multiwalled nanotubes). The combination of the solid surface and the similarity of the two materials means that polymer physics are altered in manners not seen with any other type of commonly used filler. The purpose of this review is to update a chapter that appears in a recent tome by Grady (2011) and describe how polymer physics is altered in composites that contain carbon nanotubes. Subjects that will be discussed include chain configuration, glass transition, polymer diffusion, unit cells and crystalline superstructure (lamellae, spherulites and shishkebabs), and crystallization kinetics. V C 2012 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys 50: 2012

show abstract

“…Further possibilities are opened by the addition of composite reinforcement materials, such as nanocellulose [78] or CNTs [79,80] although it should be noted that composite reinforcement is far from a magic bullet and may in fact degrade SMP performance [81]. The reader is referred to a number of excellent general reviews of SMPs and their composites [82][83][84][85] for more exhaustive assessments of previously studied polymers and their properties.…”

Section: Tendons-release Of Stored Energymentioning

confidence: 99%

Morphing in nature and beyond: a review of natural and synthetic shape-changing materials and mechanisms

2016

View full text Add to dashboard Cite

Shape-changing materials open an entirely new solution space for a wide range of disciplines: from architecture that responds to the environment and medical devices that unpack inside the body, to passive sensors and novel robotic actuators. While synthetic shape-changing materials are still in their infancy, studies of biological morphing materials have revealed key paradigms and features which underlie efficient natural shape-change. Here, we review some of these insights and how they have been, or may be, translated to artificial solutions. We focus on soft matter due to its prevalence in nature, compatibility with users and potential for novel design. Initially, we review examples of natural shape-changing materials-skeletal muscle, tendons and plant tissues-and compare with synthetic examples with similar methods of operation. Stimuli to motion are outlined in general principle, with examples of their use and potential in manufactured systems. Anisotropy is identified as a crucial element in directing shape-change to fulfil designed tasks, and some manufacturing routes to its achievement are highlighted. We conclude with potential directions for future work, including the simultaneous development of materials and manufacturing techniques and the hierarchical combination of effects at multiple length scales.

show abstract

Shape and Temperature Memory of Nanocomposites with Broadened Glass Transition

Cited by 389 publications

References 29 publications

Reduced time as a unified parameter determining fixity and free recovery of shape memory polymers

Reduced time as a unified parameter determining fixity and free recovery of shape memory polymers

Effects of carbon nanotubes on polymer physics

Morphing in nature and beyond: a review of natural and synthetic shape-changing materials and mechanisms

Contact Info

Product

Resources

About