Thermal responsive hydrogels based on semi interpenetrating network of poly(NIPAm) and cellulose nanowhiskers

Hebeish, A.; Farag, S.; Sharaf, S.; Shaheen, Th. I.

doi:10.1016/j.carbpol.2013.10.054

Cited by 125 publications

(59 citation statements)

References 36 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Poly(N-isopropylacrylamide) (PNIPAm), undergoes a phase transition at 32 • C, is extensively studied as a stimuli-responsive polymer [15,16]. Crosslinked PNIPAm has a dramatically swelling and retains its own properties [29].…”

Section: Introductionmentioning

confidence: 99%

A novel thermo-responsive hydrogel based on salecan and poly(N-isopropylacrylamide): Synthesis and characterization

Wei

et al. 2015

Colloids and Surfaces B: Biointerfaces

108

View full text Add to dashboard Cite

Section: Introductionmentioning

confidence: 99%

A novel thermo-responsive hydrogel based on salecan and poly(N-isopropylacrylamide): Synthesis and characterization

Wei

et al. 2015

Colloids and Surfaces B: Biointerfaces

108

View full text Add to dashboard Cite

“…44 Cellulose nanocrystals have been used as reinforcing agents for isotropic hydrogels. [45][46][47][48][49][50][51][52][53] Hydrogels have been prepared from freeze-cast suspensions of CNCs and xylan, in which the xylan component modified with aldehyde groups formed hemiacetal bonds with the xylan. 35 In these hydrogels, however the fast hydrolysis of hemiacetals may limit the stability of the resulting material.…”

Section: Introductionmentioning

confidence: 99%

Composite Hydrogels with Tunable Anisotropic Morphologies and Mechanical Properties

et al. 2016

View full text Add to dashboard Cite

Fabrication of anisotropic hydrogels exhibiting direction-dependent structure and properties have attracted great interest in biomimicking, tissue engineering and bioseparation. Herein, we report a single-step freeze casting-based fabrication of structurally and mechanically anisotropic aerogels and hydrogels composed of hydrazone cross-linked poly(oligoethylene glycol methacrylate) (POEGMA) and cellulose nanocrystals (CNCs). We show that by controlling the composition of the CNC/POEGMA dispersion and the freeze casting temperature, aerogels with fibrillar, columnar, or lamellar morphologies can be produced. Small-angle X-ray scattering experiments show that the anisotropy of the structure originates from the alignment of the mesostructures, rather than the CNC building blocks. The composite hydrogels show high structural and mechanical integrity and a strong variation in Young's moduli in orthogonal directions. The controllable morphology and hydrogel anisotropy, coupled with hydrazone cross-linking and biocompatibility of CNCs and POEGMA, provide a versatile platform for the preparation of anisotropic hydrogels.

show abstract

“…In particular, metal oxide NPs can add an orthogonal degree of responsiveness [114], improve conductivity [115] and give additional properties such as antimicrobial activity [115]. Cellulosic polymers have been used to sensitize hydrogels to temperature, pH and redox potential [116]. More information on hydrogels can be found in Ionov [110,117].…”

Section: Plant Tissues-volume-changementioning

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

Thermal responsive hydrogels based on semi interpenetrating network of poly(NIPAm) and cellulose nanowhiskers

Cited by 125 publications

References 36 publications

A novel thermo-responsive hydrogel based on salecan and poly(N-isopropylacrylamide): Synthesis and characterization

A novel thermo-responsive hydrogel based on salecan and poly(N-isopropylacrylamide): Synthesis and characterization

Composite Hydrogels with Tunable Anisotropic Morphologies and Mechanical Properties

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

Contact Info

Product

Resources

About