Ethyl cellulose amphiphilic graft copolymers with LCST-UCST transition: Opposite self-assembly behavior, hydrophilic-hydrophobic surface and tunable crystalline morphologies

Yuan, Hua; Chi, Hai; Yuan, Weizhong

doi:10.1016/j.carbpol.2016.04.013

Cited by 26 publications

(13 citation statements)

References 59 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The FTIR results in Fig. 2b confirmed that more GelMA contents can lead to more hydrophilic O-H functional groups (free water hydroxyl groups) in 3200–3600 cm −1 47 , 48 , hence higher water swelling ratio (Fig. 2d ).…”

Section: Resultsmentioning

confidence: 66%

A highly printable and biocompatible hydrogel composite for direct printing of soft and perfusable vasculature-like structures

Suntornnond

Tan

et al. 2017

Sci Rep

152

108

View full text Add to dashboard Cite

Vascularization is one major obstacle in bioprinting and tissue engineering. In order to create thick tissues or organs that can function like original body parts, the presence of a perfusable vascular system is essential. However, it is challenging to bioprint a hydrogel-based three-dimensional vasculature-like structure in a single step. In this paper, we report a new hydrogel-based composite that offers impressive printability, shape integrity, and biocompatibility for 3D bioprinting of a perfusable complex vasculature-like structure. The hydrogel composite can be used on a non-liquid platform and is printable at human body temperature. Moreover, the hydrogel composite supports both cell proliferation and cell differentiation. Our results represent a potentially new vascularization strategy for 3D bioprinting and tissue engineering.

show abstract

Section: Resultsmentioning

confidence: 66%

A highly printable and biocompatible hydrogel composite for direct printing of soft and perfusable vasculature-like structures

Suntornnond

Tan

et al. 2017

Sci Rep

152

108

View full text Add to dashboard Cite

show abstract

“…Inorganic esters like cellulose nitrate or even cellulose itself were found to exhibit UCST . Moreover, phase transitions have been observed for cellulose derivatives mixed or grafted with other polymers . Xanthan gums were found to be a UCST polymer as well .…”

Section: Introductionmentioning

confidence: 99%

Engineered Polysaccharides: α‐1,3‐Glucan Acetates Showing Upper Critical Solution Temperature in Organic Solvents

Heinze

Pfeifer

Koschella

et al. 2019

Macro Chemistry & Physics

View full text Add to dashboard Cite

Acetates of α‐1,3‐glucan dissolved in N,N‐dimethyl acetamide/LiCl are prepared by converting the polysaccharide with acetyl chloride, acetic acid anhydride/pyridine, or with acetic acid/N,N′‐carbonyl diimidazole. Values of the degree of substitution for the acetyl groups (DSAc) of up to 2.6 are realized. NMR spectroscopic measurements reveal a preferred conversion of the primary hydroxyl group at position 6 followed by positions 2 and 4. Depending on the DSAc, the samples may be soluble in solvents of different polarity at room temperature or at elevated temperatures showing upper critical solution temperature at DS of about 2.5. This process is found to be reversible.

show abstract

“…Block copolymers have been intensively explored as they are known to assemble spontaneously on planar surfaces or when constrained as thin films. [17][18][19][20] Modification of hydrophobic/hydrophilic block ratio, 21 or the chemical nature of one block, 22 are well-known methods to change the wettability of a surface and influence the surface pattern. Even though these approaches are well-established, drawbacks exist in terms of tedious process involved in controlling homogeneity 23 and the necessity of solvent and temperature annealing.…”

Section: Introductionmentioning

confidence: 99%

Surface-induced assembly of sophorolipids

Peyre

Hamraoui

Faustini

et al. 2017

Phys. Chem. Chem. Phys.

View full text Add to dashboard Cite

The surface self-assembly properties of acidic sophorolipids, a bolaform microbial glycolipids with pHresponsive properties in solution, were studied based on the chemical nature of the support and pH of the solution. Sophorolipids generally form micelles in water but formation of morphologies like platelets and twisted fibers depending on pH have also been reported. The surface self-assembly was achieved using dip-coating on three different substrates namely gold, silicon(111) and TiO 2 anatase. Deposition conditions (dip-coating withdrawal speed, relative humidity, temperature) were tested, and it was found that optimum self-assembly occurred at a withdrawal speed of 1 mm s À1 , T of 25 1C and relative humidity of 25%. The local structure of the sophorolipid films was characterized by Atomic Force Microscopy, while Scanning Electron Microscopy was used to characterize the spatial homogeneity. We also attempted to correlate dispersive, electron donor and electron attractor surface energy components, using Good-Van Oss's approach, and the behavior of sophorolipids. We found that when the surface energy is dominated by dispersive components, sophorolipids spontaneously assemble into entangled needles at all pH values (4, 6 and 11). However, when the surface energy is dominated by electronic components, pH has a strong influence on the surface self-assembly. We could discriminate three major organizations: homogeneous layer, isolated aggregates and a two-dimensional network similar to block copolymer surface self-assembly.

show abstract

Ethyl cellulose amphiphilic graft copolymers with LCST-UCST transition: Opposite self-assembly behavior, hydrophilic-hydrophobic surface and tunable crystalline morphologies

Cited by 26 publications

References 59 publications

A highly printable and biocompatible hydrogel composite for direct printing of soft and perfusable vasculature-like structures

A highly printable and biocompatible hydrogel composite for direct printing of soft and perfusable vasculature-like structures

Engineered Polysaccharides: α‐1,3‐Glucan Acetates Showing Upper Critical Solution Temperature in Organic Solvents

Surface-induced assembly of sophorolipids

Contact Info

Product

Resources

About