Effect of surface chemistry on the dispersion and pH-responsiveness of chitin nanofibers/ natural rubber latex nanocomposites

Yin, Jin; Hou, Jiarui; Huang, Shasha; Li, Na; Zhong, Ming; Zhang, Zejun; Geng, Yong; Ding, Beibei; Chen, Yuwei; Duan, Yongxin; Zhang, Jianming

doi:10.1016/j.carbpol.2018.12.025

Cited by 21 publications

(9 citation statements)

References 29 publications

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“…The main industrial challenge of adopting the 3DP of biomass-based nanocomposites relies on the compatibility of the feedstock materials. ,, For instance, similar to what has been observed in cellulosic materials and their derivatives, the hydrophilicity of CNWs tends to lower their dispersion and distribution in many 3D-printable hydrophobic polymer matrices. − Such an incompatibility introduces printing inaccuracy and nonuniformity and may potentially lower the thermomechanical properties of the printed material. To resolve this compatibility issue, many nanofillers are often surface-functionalized by reactive functional organic groups. ,,− Due to various surface chemistries available for polysaccharides, functionalizing CNWs offers a wide variety of opportunities, in which they can not only be easily performed but also introduce unique and exciting properties for the resulting nanocomposite.…”

Section: Introductionmentioning

confidence: 99%

Mechanically and Thermally Enhanced 3D-Printed Photocurable Polymer Nanocomposites Containing Functionalized Chitin Nanowhiskers by Stereolithography

Maalihan

Chen

Tamura

et al. 2022

ACS Appl. Polym. Mater.

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Additive manufacturing, or simply 3D printing (3DP), where objects are built through layer-wise material deposition, has gained significant academic and industrial attention as a result of the development of advanced and functional materials requiring rapid, customized, and flexible solutions. In the context of green manufacturing, diversifying environmentally and economically sustainable material portfolios is an essential endeavor for the success of 3DP technology that uses widely available, highly valuable, and renewable materials. In this study, we used stereolithography (SLA) for processing methacrylate-based photocurable resins containing crab shell-derived chitin nanowhiskers (CNWs), which are surface-functionalized by reactive acrylate groups. Results from full spectral, thermal, structural, and topological analyses corroborate not only the surface functionalization of CNWs but also indicate the presence of these photocurable CNW (pCNW) fillers in the 3D-printed nanocomposites. Owing to the strong interfacial bond induced by the physical and chemical crosslinking between the pCNW and methacrylate (MA) polymer matrix, the internally formulated nanocomposites displayed enhanced thermomechanical properties (e.g., storage modulus and glass transition temperature) compared to those of commercially available pure SLA resins. For instance, the inclusion of 0.5 wt % pCNW improved the tensile strength and stiffness to up to 78 and 71%, respectively, without compromising the toughness and ductility of the printed material. Accordingly, this result also evidences the compatibility between the filler and resin materials. Consequently, the formation of a crosslinked network in the nanocomposite structure results in a higher thermal stability and activation energy (i.e., up to ∼79%) for all the hybrid materials than the pristine MA. The high-resolution SLA print features, dimensional accuracy, and enhanced mechanical performance of our microstructure-forming functionalized chitin-based nanocomposites make them promising materials for a wide range of robust and high-performance industrial applications.

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Section: Introductionmentioning

confidence: 99%

Mechanically and Thermally Enhanced 3D-Printed Photocurable Polymer Nanocomposites Containing Functionalized Chitin Nanowhiskers by Stereolithography

Maalihan

Chen

Tamura

et al. 2022

ACS Appl. Polym. Mater.

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“…The reference nanocomposite containing the same weight fraction of unmodified CNCs (PMETAC/CNC-OH) displayed an E ′ of 4.0 GPa at 25 °C, i.e., the reinforcement is much less pronounced. Such a difference, along with the high extent of reinforcement relative to nanocomposites of other glassy polymers and CNCs, ,− and the fact that a substantial increase is seen between 28 and 33 wt % filler in the PMETAC/CNC-COONa nanocomposites (a concentration range for which percolation models predict only small increases), suggest that electrostatic interactions influence the mechanical properties of the PMETAC/CNC-COONa nanocomposites considerably. , Electrostatic interactions also govern the stress transfer between the matrix and the CNCs as well as improve the dispersion of the filler.…”

Section: Resultsmentioning

confidence: 99%

Nanocomposites Assembled via Electrostatic Interactions between Cellulose Nanocrystals and a Cationic Polymer

et al. 2021

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On account of their high strength and stiffness and their renewable nature, cellulose nanocrystals (CNCs) are widely used as a reinforcing component in polymer nanocomposites. However, CNCs are prone to aggregation and this limits the attainable reinforcement. Here, we show that nanocomposites with a very high CNC content can be prepared by combining the cationic polymer poly[(2-(methacryloyloxy)ethyl) trimethylammonium chloride] (PMETAC) and negatively charged, carboxylated CNCs that are provided as a sodium salt (CNC-COONa). Free-standing films of the composites can be prepared by simple solvent casting from water. The appearance and polarized optical microscopy and electron microscopy images of these films suggest that CNC aggregation is absent, and this is supported by the very pronounced reinforcement observed. The incorporation of 33 wt % CNC-COONa into PMETAC allowed increasing the storage modulus of this already rather stiff, glassy amorphous matrix polymer from 1.5 ± 0.3 to 6.6 ± 0.1 GPa, while the maximum strength increased from 11 to 32 MPa. At this high CNC content, the reinforcement achieved in the PMETAC/CNC-COONa nanocomposite is much more pronounced than that observed for a reference nanocomposite made with unmodified CNCs (CNC-OH).

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“…17,18 Introducing rigid nano-fillers is an effective way to reinforce and functionalize the rubber materials. In recent years, increasing attentions are drawn to bio-based reinforcing nano-fillers including chitin, [19][20][21][22] cellulose, 23,24 and lignin 25,26 on account of their non-toxicity, good biodegradability and good biocompatibility. Chitosan (CS) is a natural polysaccharide derived by the deacetylation of chitin, a major component of crustacean shells of crabs, shrimps, or prawns.…”

Section: Introductionmentioning

confidence: 99%

Preparation of high‐performance deproteinized natural rubber/chitosan composite films via a green and sulfur‐free method

Yuan

Sun

Tian

et al. 2022

J of Applied Polymer Sci

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To solve the environment and health issues arose from the sulfur vulcanization, a facile and completely eco-friendly method of latex-assembly and in situ cross-linking is developed to prepare fully bio-based and high-performance rubber films. The films are featured by a "reinforced concrete" structure composed of dynamically cross-linked chitosan framework and unvulcanized deproteinized natural rubber (DPNR) matrix. The self-assembly of DPNR latex particles and chitosan, as well as the in situ cross-linking of chitosan in the film forming process are confirmed by transmission electron microscope and dynamic light scattering. As green rubbers without vulcanization, the asdesigned composite films possess excellent mechanic properties comparable to those of the sulfur vulcanized DPNR film, whose tensile strength and toughness reach 15.2 MPa and 77.6 MJ m À3 respectively. Moreover, the films exhibited appropriate permeability to moisture and achievable reprocessing, which have potential applications in wearable devices.

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Effect of surface chemistry on the dispersion and pH-responsiveness of chitin nanofibers/ natural rubber latex nanocomposites

Cited by 21 publications

References 29 publications

Mechanically and Thermally Enhanced 3D-Printed Photocurable Polymer Nanocomposites Containing Functionalized Chitin Nanowhiskers by Stereolithography

Mechanically and Thermally Enhanced 3D-Printed Photocurable Polymer Nanocomposites Containing Functionalized Chitin Nanowhiskers by Stereolithography

Nanocomposites Assembled via Electrostatic Interactions between Cellulose Nanocrystals and a Cationic Polymer

Preparation of high‐performance deproteinized natural rubber/chitosan composite films via a green and sulfur‐free method

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