Highly temperature resistant cellulose nanofiber/polyvinyl alcohol hydrogel using aldehyde cellulose nanofiber as cross-linker

Zhu, Longxiang; Liu, Yun; Jiang, Zhiming; Sakai, Eiichi; Peng, Zhu

doi:10.1007/s10570-019-02435-8

Cited by 47 publications

(20 citation statements)

References 45 publications

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“…Their most remarkable properties are hydrophilicity, insolubility in water, elasticity and softness [ 3 , 4 ]. However, as biomedical materials, hydrogels require severe sterilization before use and must be able to withstand body temperatures once introduced into the organism in order to prevent decomposition [ 5 ]. Thus, thermal stability is a very important characteristic to consider in the development of hydrogels, to select the raw materials and processing conditions properly.…”

Section: Introductionmentioning

confidence: 99%

Applied Rheology as Tool for the Assessment of Chitosan Hydrogels for Regenerative Medicine

et al. 2021

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The regeneration of soft tissues that connect, support or surround other tissues is of great interest. In this sense, hydrogels have great potential as scaffolds for their regeneration. Among the different raw materials, chitosan stands out for being highly biocompatible, which, together with its biodegradability and structure, makes it a great alternative for the manufacture of hydrogels. Therefore, the aim of this work was to develop and characterize chitosan hydrogels. To this end, the most important parameters of their processing, i.e., agitation time, pH, gelation temperature and concentration of the biopolymer used were rheologically evaluated. The results show that the agitation time does not have a significant influence on hydrogels, whereas a change in pH (from 3.2 to 7) is a key factor for their formation. Furthermore, a low gelation temperature (4 °C) favors the formation of the hydrogel, showing better mechanical properties. Finally, there is a percentage of biopolymer saturation, from which the properties of the hydrogels are not further improved (1.5 wt.%). This work addresses the development of hydrogels with high thermal resistance, which allows their use as scaffolds without damaging their mechanical properties.

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Section: Introductionmentioning

confidence: 99%

Applied Rheology as Tool for the Assessment of Chitosan Hydrogels for Regenerative Medicine

et al. 2021

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“…This is because TA can be completely dissolved in water at 40 °C. 42 Although TA is cross-linked with PVA such that its heat resistance is improved due to the excellent high-temperature resistance of PVA, 43 it still partially dissolves at low temperatures. In addition, since TA and PVA are linked by hydrogen bonds, when the temperature increases, the hydrogen bonds between molecules are weakened, which make the 3D mesh structure of the PVA-TA-MWNT hydrogel no longer stable.…”

Section: Resultsmentioning

confidence: 99%

A Self-Detecting and Self-Cleaning Biomimetic Porous Metal-Based Hydrogel for Oil/Water Separation

Sang

Jiang

et al. 2022

ACS Appl. Mater. Interfaces

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Porous materials with super-wetting surfaces (superhydrophilic/underwater superoleophobic) are ideal for oil/ water separation. However, the inability to monitor the pollution degree and self-cleaning during the separation process limits their application in industrial production. In this study, a porous metalbased hydrogel is proposed, inspired by the porous structure of wood. Porous copper foam with nano-Cu(OH) 2 is used as the skeleton, and its surface is coated with a polyvinyl alcohol, tannic acid, and multiwalled carbon nanotube cross-linked hydrogel coating. The hydrogel has superhydrophilicity and excellent oil/ water separation efficiency (>99%) and can adapt to various environments. This approach can also realize hydrogel pollution degree self-detection according to the change in the electrical signal generated during the oil/water separation process, and the hydrogel can also be recovered by soaking to realize self-cleaning. This study will provide new insights into the application of oil/ water separation materials in practical industrial manufacturing.

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“…The more the number of indicators close to nature cartilage, the more potential that material has as a cartilage replacement. The tensile strength, tensile modulus, compressive strength, compressive modulus, toughness, and friction coefficient reported in recent studies are in the range of 0.43–20.5 MPa, [ 66,95 ] 0.045–181 MPa, [ 36,96 ] 0.019–74.14 MPa, [ 41,67 ] 0.33–19.7 MPa, [ 59,70 ] 0.065–44.8 MJ m −3 , [ 50,66 ] and 0.026–0.09, [ 62 ] respectively. The creep of the material is evaluated by aggregated modulus, which is reported by only a few articles and has values around 0.78.…”

Section: Strengthening Mechanisms and Basic Property Characterizationmentioning

confidence: 99%

PVA‐Based Hydrogels: Promising Candidates for Articular Cartilage Repair

Chen

Song

Wang

et al. 2021

Macromolecular Bioscience

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The complex, gradient physiological structure of articular cartilage is a severe hindrance of its self‐repair, leaving the clinical treatment of cartilage defects a demanding issue to be addressed. Currently applied tissue engineering treatments and traditional non‐tissue engineering treatments have different limitations, for example, cell dedifferentiation, immune rejection, and prosthesis‐related complications. Thus, studies have been focusing on seeking promising candidates for novel cartilage repair methods. Polyvinyl alcohol (PVA) hydrogels with excellent biocompatibility and tunable material properties have become the alternatives. For pure PVA hydrogels, the mechanical strength and lubricity are not capable of replacing articular cartilage until proper modifications are done. This paper summarizes the research progress in PVA hydrogels, including the preparation, modification, and cartilage‐repair‐aimed biomimetic improvements. Design guidance of PVA hydrogels is put forward as assistance to functional hydrogel preparation. Finally, the prospects and main obstacles of PVA hydrogels are discussed.

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Highly temperature resistant cellulose nanofiber/polyvinyl alcohol hydrogel using aldehyde cellulose nanofiber as cross-linker

Cited by 47 publications

References 45 publications

Applied Rheology as Tool for the Assessment of Chitosan Hydrogels for Regenerative Medicine

Applied Rheology as Tool for the Assessment of Chitosan Hydrogels for Regenerative Medicine

A Self-Detecting and Self-Cleaning Biomimetic Porous Metal-Based Hydrogel for Oil/Water Separation

PVA‐Based Hydrogels: Promising Candidates for Articular Cartilage Repair

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