Novel moisture-sensitive shape memory polyurethanes containing pyridine moieties

Chen, Shaojun; Hu, Jinlian; Yuen, C.W.M.; Chan, Laikuen

doi:10.1016/j.polymer.2009.07.031

Cited by 136 publications

(133 citation statements)

References 17 publications

Supporting

Mentioning

128

Contrasting

Order By: Relevance

“…The film also recovers to its open state. The shape recovery process is very similar to the open process of flower made of HDI-BINA series moisture-sensitive shape memory polyurethane film as reported in previous literature [6], [7] . It is thus confirmed that the IPDI-BINA system can also show moisture-sensitive shape memory.…”

Section: Resultssupporting

confidence: 84%

“…It is found that within the temperature range of 40-100℃, IPDI-BINA systems have 4.4wt% weight loss. It indicates that the IPDI-BINA show good moisture absorption properties [6], [7]. At the same time, it is found in DTG curve that the sample IPDI-BINA-a display three stages of weight loss, e.g.…”

Section: Resultsmentioning

confidence: 77%

“…Preparation N, N -bis (2-hydroxyethyl) isonicotinamid (BINA), Dimethylformamide (DMF), isophorone diisocyanate (IPDI) were bought from aladdin-reagent (Shanghai) Co. Ltd. The IPDI-SMPUs were prepared with BINA and IPDI in DMF solution at 1:1.05 molar ratios of groups OH/NCO according to the synthesis procedure described in our previous literature [6], [7] B. Characterizations DSC curves of samples were determined by using a TA Q200 instrument having nitrogen as the purged gas. Indium and zinc standards were used for calibration.…”

Section: Experimental Partmentioning

confidence: 99%

“…For example, Yu et al [5]，have studied the effect of moisture absorption on the SMPU foam synthesized from1,6-hexanediisocyantes; It demonstrates that water absorption significantly decreased the T g of the foam. In our previous work [6], [7], we had reported one kind of supramolecular polyurethane containing pyridine moieties. In addition to the thermal-induced shape memory effect, they are also found to show moisture-sensitive shape memory effect.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Studies on Moisture-Sensitive Shape Memory Behavior of IPDI –BINA Based Polyurethane

Yuan¹,

Chen²,

Chen³

et al. 2013

IJCEA

Self Cite

View full text Add to dashboard Cite

Abstract-Shape memory polyurethane is attractive in recent years because of its wide applications in many fields. In order to study the moisture-sensitive shape memory effect of pyridine containing shape memory polyurethane, in this work, moisture absorption and moisture-sensitive shape memory behavior of pyridine containing SMPU synthesized from BINA and IPDI are investigated systematically. The results show that IPDI-BINA SMPU shows moisture absorption and the moisture absorption affects significantly the thermal and DMA properties. Finally, shape recovery process under moisture condition demonstrates that IPDI-BINA SMPU show moisture-sensitive shape memory effect that it can recover the origin shape under the moistures condition.

show abstract

Section: Resultssupporting

confidence: 84%

Section: Resultsmentioning

confidence: 77%

Section: Experimental Partmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Studies on Moisture-Sensitive Shape Memory Behavior of IPDI –BINA Based Polyurethane

Yuan¹,

Chen²,

Chen³

et al. 2013

IJCEA

Self Cite

View full text Add to dashboard Cite

show abstract

“…A pyridine unit, which is responsive to moisture, is good choice to use for improvement of the moisture absorption in PU. Hu et al introduced a pyridine unit (N-bis(2-hydroxyethyl) isonicotinamine) into SMPU to achieve moisture-responsive SMPU with high strain recovery and recovery speed [26]. In addition to that, Hu and his team also fabricated cellulose nanowhiskers (CNWs)/elastomer and CNW/SMPU nanocomposites which exhibited good water sensitivity due to the reversible hydrogen bonding.…”

Section: Water/solvent-responsive Smpsmentioning

confidence: 99%

Shape Memory Polymers for Smart Textile Applications

Thakur¹

2017

Textiles for Advanced Applications

View full text Add to dashboard Cite

Shape memory polymer (SMP) is a genre of smart materials which demonstrate a capability to fix in the temporarily programed shape and to recover the original shape upon exposure to external stimuli. Such unique and amazing properties of SMPs are applied to develop smart textiles by incorporating SMP into the fabric. Various types of stimuliresponsive SMPs such as thermal, light, pH, and moisture have been used in textiles for enhancing or attaining some smart properties. The integration of SMPs in fabric provides many fascinating and improved properties such as good aesthetic appeal, comfort, textile soft display, smart controlled drug release, fantasy design, wound monitoring, smart wetting properties and protection against extreme variations in environmental conditions. In this chapter, we discussed different types of SMP used for this purpose, their functions, and applications in textiles with their potential applications in the near future.

show abstract

Shape‐Memory Microfluidics

Balasubramanian¹,

Morhard²,

Bettinger

2013

Adv Funct Materials

View full text Add to dashboard Cite

Materials with embedded vascular networks afford rapid and enhanced control over bulk material properties including thermoregulation and distribution of active compounds such as healing agents or stimuli. Vascularized materials have a wide range of potential applications in self‐healing systems and tissue engineering constructs. Here, the application of vascularized materials for accelerated phase transitions in stimuli‐responsive microfluidic networks is reported. Poly(ester amide) elastomers are hygroscopic and exhibit thermo‐mechanical properties (Tg ≈ 37 °C) that enable heating or hydration to be used as stimuli to induce glassy‐rubbery transitions. Hydration‐dependent elasticity serves as the basis for stimuli‐responsive shape‐memory microfluidic networks. Recovery kinetics in shape‐memory microfluidics are measured under several operating modes. Perfusion‐assisted delivery of stimulus to the bulk volume of shape‐memory microfluidics dramatically accelerates shape recovery kinetics compared to devices that are not perfused. The recovery times are 4.2 ± 0.1 h and 8.0 ± 0.3 h in the perfused and non‐perfused cases, respectively. The recovery kinetics of the shape‐memory microfluidic devices operating in various modes of stimuli delivery can be accurately predicted through finite element simulations. This work demonstrates the utility of vascularized materials as a strategy to reduce the characteristic length scale for diffusion, thereby accelerating the actuation of stimuli‐responsive bulk materials.

show abstract

Novel moisture-sensitive shape memory polyurethanes containing pyridine moieties

Cited by 136 publications

References 17 publications

Studies on Moisture-Sensitive Shape Memory Behavior of IPDI –BINA Based Polyurethane

Studies on Moisture-Sensitive Shape Memory Behavior of IPDI –BINA Based Polyurethane

Shape Memory Polymers for Smart Textile Applications

Shape‐Memory Microfluidics

Contact Info

Product

Resources

About