Shape memory polyurethanes reinforced with carbon nanotubes

Fonseca, A.; Abreu, Bruno; Gonçalves, F.A.M.M.; Ferreira, A.G.M.; Moreira, R. A. S.; Oliveira, Mónica

doi:10.1016/j.compstruct.2012.11.029

Cited by 54 publications

(38 citation statements)

References 33 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…11(b) that there were two main peaks. The weight loss in the first peak can be related with the degradation of PCL segments while the second can be due to degradation of PEG segments [11,32]. As it can be seen, at T7-OH contents of 10 wt.% the stability of the materials was significantly affected by the presence of T7-OH, showing maximum degradation temperatures around 400°C.…”

Section: Thermal Degradation and In Vitro Degradation Researchmentioning

confidence: 88%

Preparation and characterization of POSS-crosslinked PCL based hybrid materials

Yin

Zhang

2016

J Polym Res

View full text Add to dashboard Cite

PCL based hybrid films exhibiting heat-responsive shape memory properties had been obtained by using Heptaphenyltricycloheptasiloxane Trihydroxy Silanol (T7-OH) as a cross-linker. The crystallization behaviors of the materials were studied in detail by DSC and XRD. The thermal properties of the materials were detected through TGA. The static mechanical properties, in vitro degradation and shape memory properties were also studied systematically. There was no remarkable T7-OH crystal plane diffraction peak according to XRD which indicated that T7-OH was well dispersed in the matrix. Meanwhile, according to the TGA, thermal degradation temperatures were increased significantly when T7-OH were added. It was worth noting that the materials possessed excellent shape memory properties with R f > 97 % and R r > 97 %.

show abstract

Section: Thermal Degradation and In Vitro Degradation Researchmentioning

confidence: 88%

Preparation and characterization of POSS-crosslinked PCL based hybrid materials

Yin

Zhang

2016

J Polym Res

View full text Add to dashboard Cite

show abstract

“…In that study, the authors demonstrated significant increases in the glass transition temperature (T g ) and degradation temperature (T d ), which moved from À25 C to À16 C and from 307.5 C to 360 C, respectively, with only a 0.5 wt% loading of CNTs [27]. This improvement in mechanical properties was also demonstrated by a significantly more rapid recovery when heated past T g (Fig.…”

Section: Smp-organic Compositesmentioning

confidence: 90%

Shape Memory Polymer–Inorganic Hybrid Nanocomposites

Reit

Lund

Voit

2014

Organic-Inorganic Hybrid Nanomaterials

View full text Add to dashboard Cite

Shape memory polymers (SMPs) have been the focus of much research over the last few decades. From the novelty of temporarily fixing a threedimensional shape from a planar polymer sheet, to the uses that SMPs are seeing today as softening biomedical implants and self-deploying hinges, this class of smart materials has successfully been used to tackle a variety of biological, electrical, and mechanical problems. However, the properties of these networks are limited by the organic nature of the SMPs. To enhance their properties, researchers across the globe have looked into imparting the desirable properties of inorganic composite materials to these polymer networks. As the field of shape memory polymer composites began to grow, researchers quantified the unique enhancements that came at varying filler loading levels as a result of controlled material interface interactions. Specifically, the incorporation of nanofillers of various shapes and sizes leads to increased internal interfacial area relative to micro-and macrocomposites at identical loading fractions and imparts interesting mechanical, optical, electrical, thermal, and magnetic properties to these emerging nanocomposites. This new class of material, referred to in this review as shape memory polymer-inorganic nanocomposites (SMPINCs), allows a host of new interactions between the smart polymer and its surrounding environment as a result of the ability to control the internal environment of the polymer network and nanofiller. In this work, the reader is introduced to both the methods of preparing these composites and the effects the fillers have on the biological, electromagnetic, and mechanical properties of the resulting composite.

show abstract

“…The CNTs-filled polyurethane composites fabricated either via melt mixing, dispersion of CNTs in the solvent, and the dissolution of the polyurethane in the same solvent, followed by solvent evaporation or the reaction of the monomers or pre-polyurethane in the presence of dispersed CNTs (Gupta et al 2013;Liu et al 2013a, b, c). The former has not been tried; most probably due to weakly melting material has less tendency to disperse CNTs, since the latter technique is only industrially practical (Fonseca et al 2013;Zheng et al 2013). The latter technique accustomed to generate MWCNTs-filled polyurethane composites.…”

Section: Cnts: In Polyurethane Polymeric Compositesmentioning

confidence: 99%

Multifunctionalized Carbon Nanotubes Polymer Composites: Properties and Applications

Julkapli

Sapuan

2015

Advanced Structured Materials

View full text Add to dashboard Cite

Carbon nanotubes (CNTs) is a rigid rod-like nanoscale material produced from carbon in powder, liquid, or gel form via acid or chemical hydrolysis. Due to its unique and exceptional renewability, biodegradability, mechanical, physicochemical properties, and abundance, the incorporation associated with a small quantity of CNTs to polymeric matrices enhance the mechanical and thermal resistance, and also stability of the latter by several orders of magnitude. Moreover, NCC-derived carbon materials are of no serious threat to the environment, providing further impetus for the development and applications of this green and renewable biomaterial for lightweight and degradable composites. Surface functionalization of CNTs remains the focus of CNTs research in tailoring its properties for dispersion in hydrophilic and hydrophobic media. Through functionalization, the attachment of appropriate chemical functionalities between conjugated sp 2 of CNTs and polymeric matrix is established. It is thus of utmost importance that the tools and protocols for imaging CNTs in a complex matrix and quantify its reinforcement, antimicrobial, stability, hydrophilicity, and biodegradability are be developed.

show abstract

Shape memory polyurethanes reinforced with carbon nanotubes

Cited by 54 publications

References 33 publications

Preparation and characterization of POSS-crosslinked PCL based hybrid materials

Preparation and characterization of POSS-crosslinked PCL based hybrid materials

Shape Memory Polymer–Inorganic Hybrid Nanocomposites

Multifunctionalized Carbon Nanotubes Polymer Composites: Properties and Applications

Contact Info

Product

Resources

About