Nanocomposites of epoxy-based shape memory polymer and thermally reduced graphite oxide: Mechanical, thermal and shape memory characterizations

Chen, Lei; Li, Wenbing; Liu, Yanju; Leng, Jinsong

doi:10.1016/j.compositesb.2016.01.019

Cited by 69 publications

(43 citation statements)

References 58 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Generally, multiple‐SMPs are fabricated through the polymers displaying a broad thermal transition temperature, including melting temperature (T m ) and glass transition temperature (T g ), and polymers with two or even more well‐separated thermal transition temperatures. These strategies are commonly accomplished by grafting, copolymerization, preparation of an interpenetrating polymer network (IPN) or blending .…”

Section: Introductionmentioning

confidence: 99%

Designing triple‐shape memory polymers from a miscible polymer pair through dual‐electrospinning technique

Sabzi

Ranjbar‐Mohammadi

Zhang

et al. 2019

J of Applied Polymer Sci

Self Cite

View full text Add to dashboard Cite

Recently, multiple‐shape memory polymers (SMPs) have attracted a great deal of attention in biomedical applications. Therefore, a series of triple‐SMPs were developed by simply blending of two immiscible SMPs exhibiting two distinct transition temperatures, which is required for triple‐shape memory (SM) effect. However, fabrication of triple‐SMPs from completely miscible polymer pairs using the conventional blending approach is a challenging problem. Because this type of blends consists of one homogeneous phase and thereby exhibit only one transition temperature and dual‐SM behavior. To overcome this problem, herein, a novel and versatile strategy is introduced for preparation of phase separated blends from a completely miscible polymer pair, exhibiting triple‐SM behavior. Dual‐electrospinning technique was utilized to simultaneously electrospin poly(lactic acid) (PLA) and poly(vinyl acetate) (PVAc), as a model miscible polymer pair, to obtain an interwoven polymer composite with two well‐separated thermal transitions, as revealed by dynamic mechanical analyze. Consequently, the SM experiments revealed that the electrospun PLA/PVAc composites have triple‐SM behavior. Furthermore, incorporation of graphene nanoplatelets into the composite fibers significantly improved the triple‐SM properties of samples. Additionally, excellent adherence and spreading of the osteoblasts on the fibrous scaffolds containing graphene were observed. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47471.

show abstract

Section: Introductionmentioning

confidence: 99%

Designing triple‐shape memory polymers from a miscible polymer pair through dual‐electrospinning technique

Sabzi

Ranjbar‐Mohammadi

Zhang

et al. 2019

J of Applied Polymer Sci

Self Cite

View full text Add to dashboard Cite

show abstract

“…There are two broad approaches to this issue as follows: polymer blending and using fillers. Previous studies show that the presence of only a small amount of carbon nanotubes (CNT) or graphene in a polymer matrix can significantly improve its mechanical properties and recovery stress . The uniform dispersion of CNTs in a matrix is a key factor that directly affects the mechanical properties of the nanocomposite.…”

Section: Introductionmentioning

confidence: 99%

Shape memory and mechanical properties of TPU/ABS blends: The role of pristine versus organo‐modified carbon nanotubes

et al. 2017

View full text Add to dashboard Cite

Some shape‐memory materials were prepared based on TPU/ABS blends containing pristine and organo‐modified multiwalled carbon nanotubes (MWCNTs). The shape memory and mechanical properties of the samples were investigated. Scanning electron microscopy (SEM) analysis performed on the morphological features of the developed samples showed the presence of pristine MWCNTs and decreased diameter of ABS droplets which were uniformly distributed within TPU matrix. Unexpectedly, the ABS droplets in nanocomposites with organo‐modified MWCNTs were greater than ABS droplets in TPU/ABS/CNT nanocomposites. These differences were attributed to different degrees in interfacial interactions between the modified MWCNT and TPU matrix. The presence of modified MWCNT in TPU matrix could have increased the differences in surface energy and polarity of TPU and ABS and it has disturbed the compatibility of the blend fundamentally. Also, the mechanical and Izod impact properties of the shape memory samples containing pristine MWCNT are better than those samples containing MWCNT‐OH and MWCNT‐COOH. The results showed optimum tensile strength in all samples containing 2 wt% MWCNTs. The shape memory results showed that the shape recovery and fixity of TPU/ABS blend improved significantly with increases in MWCNTs. The pristine MWCNTs improved the shape recovery ratio from 93.88% for the neat TPU/ABS blend to 99.3% for TPU/ABS nanocomposite by just loading MWCNTs at 2 wt%. Surprisingly, the shape fixity changed from 92.98% for the neat blend to 100% by loading of 2 wt% of MWCNT‐OH and 1 wt% of MWCNT‐COOH. The results showed that the functionalized MWCNTs had better performance in shape fixity as compared to its pristine MWCNT counterpart. POLYM. COMPOS., 39:E984–E995, 2018. © 2017 Society of Plastics Engineers

show abstract

“…Inorganic fillers are ideal candidate materials with which to improve the mechanical strength of SMPs. Various inorganic fillers, such as carbon nanotubes (CNTs), carbon black, chopped fiber, and graphene and its oxide, can be used in SMP matrices . The outstanding mechanical properties of composites are a result of the load transfer from polymer matrix to filler materials that are of higher stiffness and failure strength.…”

Section: Introductionmentioning

confidence: 99%

Shape memory behavior of carbon nanotube‐reinforced trans‐1,4‐polyisoprene and low‐density polyethylene composites

Xia

Gui-xue

2019

Polymers for Advanced Techs

View full text Add to dashboard Cite

Shape memory composites of trans‐1,4‐polyisoprene (TPI) and low‐density polyethylene (LDPE) with easily achievable transition temperatures were prepared by a simple physical blending method. Carbon nanotubes (CNTs) were introduced to improve the mechanical properties of the TPI/LDPE composites. The mechanical, cure, thermal, and shape memory properties of the TPI/LDPE/CNTs composites were investigated in this study. In these composites, the cross‐linked network generated in both the TPI and LDPE portions acted as a fixed domain, while the crystalline regions of the TPI and LDPE portions acted as a domain of reversible shape memory behavior. We found that CNTs acted as not only reinforced fillers but also nucleation agents, which improved the crystalline degree of the TPI and LDPE portions of the composites. Compared with the properties at the other CNT doses, the mechanical properties of the TPI/LDPE composites when the CNT dose was 1 phr were improved significantly, showing excellent shape memory properties (Rf = 97.85%, Rr = 95.70%).

show abstract

Nanocomposites of epoxy-based shape memory polymer and thermally reduced graphite oxide: Mechanical, thermal and shape memory characterizations

Cited by 69 publications

References 58 publications

Designing triple‐shape memory polymers from a miscible polymer pair through dual‐electrospinning technique

Designing triple‐shape memory polymers from a miscible polymer pair through dual‐electrospinning technique

Shape memory and mechanical properties of TPU/ABS blends: The role of pristine versus organo‐modified carbon nanotubes

Shape memory behavior of carbon nanotube‐reinforced trans‐1,4‐polyisoprene and low‐density polyethylene composites

Contact Info

Product

Resources

About