Effect of surface charge content in the TEMPO-oxidized cellulose nanofibers on morphologies and properties of poly( N -isopropylacrylamide)-based composite hydrogels

Wei, Jinguang; Chen, Yufei; Liu, Hongzhi; Du, Chungui; Yu, Hailiang; Ru, Jing; Zhou, Zhongxi

doi:10.1016/j.indcrop.2016.08.006

Cited by 46 publications

(15 citation statements)

References 40 publications

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“…The presence of electrostatically-adsorbed polymers on CNF was identified by FT-IR and TGA studies. Wei et al prepared a PNIPAM/TOCN composite hydrogel by in situ radical polymerization [ 221 ]. In this case, there was substantial electrostatic interaction between the carboxylate of TOCN and the amide of PNIPAM that caused the improved compressive strength and modulus in the composite hydrogel with the increase in the carboxylate content in the TOCN.…”

Section: Polymer Nanocomposites Reinforced By Cnfmentioning

confidence: 99%

Recent Advances in Nanocellulose Composites with Polymers: A Guide for Choosing Partners and How to Incorporate Them

2018

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Abstract:In recent years, the research on nanocellulose composites with polymers has made significant contributions to the development of functional and sustainable materials. This review outlines the chemistry of the interaction between the nanocellulose and the polymer matrix, along with the extent of the reinforcement in their nanocomposites. In order to fabricate well-defined nanocomposites, the type of nanomaterial and the selection of the polymer matrix are always crucial from the viewpoint of polymer-filler compatibility for the desired reinforcement and specific application. In this review, recent articles on polymer/nanocellulose composites were taken into account to provide a clear understanding on how to use the surface functionalities of nanocellulose and to choose the polymer matrix in order to produce the nanocomposite. Here, we considered cellulose nanocrystal (CNC) and cellulose nanofiber (CNF) as the nanocellulosic materials. A brief discussion on their synthesis and properties was also incorporated. This review, overall, is a guide to help in designing polymer/nanocellulose composites through the utilization of nanocellulose properties and the selection of functional polymers, paving the way to specific polymer-filler interaction.

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Section: Polymer Nanocomposites Reinforced By Cnfmentioning

confidence: 99%

Recent Advances in Nanocellulose Composites with Polymers: A Guide for Choosing Partners and How to Incorporate Them

2018

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“…g/g and the carboxyl group content of 54 µmol COOH/g, respectively, for the current enzymatic CNF. This suggests that amount of electrostatic repulsion between the CNFs is sufficient to be well dispersed within the PA 6 matrix, which is further corroborated by improvement in tensile properties [ 35 ]. Nevertheless, shorter chained polyamides such as PA 6 possess higher frequency of amide groups resulting in hydrophilicity and thus, leading to stronger interactions with CNF.…”

Section: Resultsmentioning

confidence: 85%

High Performance PA 6/Cellulose Nanocomposites in the Interest of Industrial Scale Melt Processing

Sridhara

Vilaseca

2021

Polymers

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On an industrial scale, it is a challenge to achieve cellulose based nanocomposites due to dispersion issues and high process temperatures sensitivity. The current study describes methods to develop mechanically strong and thermally stable polyamide 6 (PA 6) and cellulose nanofibers (CNF) composites capable of tolerating high processing temperatures. With PA 6 being a very technical polymer matrix to be reinforced with CNF, good dispersion can be achieved with a high speed kinetic mixer and also shield the CNF from excess thermal degradation by implementing extremely short processing time. This paper presents an industrially feasible method to produce PA 6/CNF nanocomposites with high CNF composition processed by a high speed kinetic mixer (GELIMAT®) followed by compression molding to obtain a homogenous and thermally stable nanocomposites aimed at high performance applications. PA 6 was reinforced with three different wt.% formulations (5, 15 and 25 wt.%) of cellulose nanofibers. The resulting nanocomposites exhibited significant increase in Young’s modulus and ultimate strength with CNF content, owing to the effective melt processing and the surface charge density of the CNF, which necessitated the dispersion. The thermal stability and polymer crystallinity with respect to CNF composition for the PA 6/CNF nanocomposites were examined by TGA and DSC analysis. Rheology studies indicated that viscosity of the composites increased with increase in CNF composition. Overall, this work demonstrates industrially viable manufacturing processes to fabricate high performance PA 6/CNF nanocomposites.

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“…The highest strength (116 kPa) of the nanoreinforced AX hydrogel were superior to those reported for a commercially used, synthetic poly( N -isopropylacrylamide) (PNIPAM, temperature-responsive polymer) hydrogel reinforced with TEMPO-oxidized CNFs (79.6 kPa), which was tested under similar conditions. 27 In a previous study, the compression stresses of xylan-rich hemicellulose hydrogels were reported to increase from 13.6 kPa to 38.6 kPa as the degree of crosslinking increased. 28 This behavior was also observed for both σ and σ 50% of all hydrogels ( Table 2 and Fig.…”

Section: Resultsmentioning

confidence: 93%

Promoted hydrogel formation of lignin-containing arabinoxylan aerogel using cellulose nanofibers as a functional biomaterial

et al. 2018

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Effect of surface charge content in the TEMPO-oxidized cellulose nanofibers on morphologies and properties of poly( N -isopropylacrylamide)-based composite hydrogels

Cited by 46 publications

References 40 publications

Recent Advances in Nanocellulose Composites with Polymers: A Guide for Choosing Partners and How to Incorporate Them

Recent Advances in Nanocellulose Composites with Polymers: A Guide for Choosing Partners and How to Incorporate Them

High Performance PA 6/Cellulose Nanocomposites in the Interest of Industrial Scale Melt Processing

Promoted hydrogel formation of lignin-containing arabinoxylan aerogel using cellulose nanofibers as a functional biomaterial

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