Lignin-graphene oxide inks for 3D printing of graphitic materials with tunable density

Roman, Julien; Néri, Wilfrid; Fierro, Vanessa; Bentaleb, Ahmed; Ly, Isabelle; Zhong, Jing; Derré, Alain; Poulin, Philippe

doi:10.1016/j.nantod.2020.100881

Cited by 32 publications

(29 citation statements)

References 51 publications

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“…So, the presence of lignin in the filler (PANI-L) decreased the viscosity of the resin (see Figure S1A) as reported in the literature. [47][48][49] Lignin has a highly branched structure and lower molecular weight than PANI. [50] As a result, lignin can act as a diluent for PANI by reducing the hydrogen bond interactions between the N-H groups of PANI which has a dispersing effect, favoring the movement of polymer chains.…”

Section: Viscosity Of Liquid Formulationsmentioning

confidence: 99%

Photocurable Printed Piezocapacitive Pressure Sensor Based on an Acrylic Resin Modified with Polyaniline and Lignin

Arias-Ferreiro

Ares‐Pernas

Lasagabáster-Latorre

et al. 2022

Adv Materials Technologies

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In this context, dielectric polymeric materials are being investigated due to their scientific and technological interest since they combine dielectric properties with appropriate mechanical flexibility and simple processability. [2,3] Such composite materials show huge opportunities to be integrated in devices such as electronics, [4][5][6] sensors and actuators. [7] Within this context, additive manufacturing emerges as a set of advanced fabrication techniques that enable the production of fully functional electronic devices in one step printing. [1,[8][9][10] However, for photopolymerization-based 3D printing techniques the number of UV curable materials suitable for the fabrication of sensors and actuators is still scarce. [1] Research in this field pursues 3D printing materials with new features but also environmentally more friendly and sustainable, as demanded by today's society. [11][12][13] Techniques as stereolithography (SLA) and digital light processing (DLP) are based on the layer-by-layer solidification of a liquid photosensitive resin via UV-light exposure. [14] This is a tailorable process where multicomponent resins provide the photo-rheological and mechanical properties necessary to ensure a successful print. [15] The design of suitable materials for the manufacture of pressure sensors with high sensitivity and flexibility in wearable electronics is still a challenge. In this study, a flexible and portable pressure sensor is developed based on a photopolymeric formulation of polyaniline (PANI)/Lignin/acrylate. The amount of photoinitiator and the presence of lignin within the filler are investigated to obtain the best printability and capacitive response. Low PANI contents drastically increase the dielectric constant and 4 wt% photoinitiator improves the signal and sensitivity. A sensitivity of 0.012 kPa -1 is achieved in a linear range (0-10 kPa) with only 3.5 wt% PANI. Lignin improves both the dispersion of the filler within the matrix and the printability of the resin, due to lower absorptivity at the UV wavelength of the 3D printer. Thus, the PANI-Lignin filler is selected for the fabrication of a piezocapacitive prototype transducer. The pressure transducer demonstrate its practical application by responding to a human footfall and transmitting its corresponding electrical signal. This study shows the enhanced properties of lignin modified PANI acrylate composites. Based on lignin, an abundant natural waste, a sustainable photocurable cost-effective polymer is proposed for the fabrication of printable, wearable electronics.

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Section: Viscosity Of Liquid Formulationsmentioning

confidence: 99%

Photocurable Printed Piezocapacitive Pressure Sensor Based on an Acrylic Resin Modified with Polyaniline and Lignin

Arias-Ferreiro

Ares‐Pernas

Lasagabáster-Latorre

et al. 2022

Adv Materials Technologies

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“…To make 3D-printed porous carbons more sustainable, it is therefore interesting to use bio-based resins as carbon precursors. Unlike previous studies in which bio-based carbon precursors such as lignin, cellulose, and monosaccharides have been used in direct ink writing technology, − in this work we present an approach to print highly porous carbons with low shrinkage and warpage from a bio-based photoresin using laser stereolithography.…”

Section: Introductionmentioning

confidence: 99%

Tannin-Based Resins for 3D printing of Porous Carbon Architectures

Blyweert

Nicolas

Macutkevič

et al. 2022

ACS Sustainable Chem. Eng.

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Carbon structures, unlike metals or polymers, can hardly be directly implemented in additive manufacturing, and their sustainable nature is extremely limited. In this work, we demonstrate that porous carbon structures can be obtained by laser stereolithography of acrylate–tannin mixed resins, followed by a pyrolysis step. By adjustment of the initial acrylate/tannin ratio in the resin, the density and volume shrinkage of the resultant carbon, and consequently the mechanical properties of the corresponding carbon-based architectures, could be modified. The moderate electrical conductivity of the structures, reaching about 7 S cm–1, and their broad-band absorption in microwaves open up possibilities for electrochemical or electromagnetic applications. Thus, the possibility of obtaining complex freestanding structures with imperceptible warpage, low volume shrinkage, and adjustable density offers an opportunity to develop 3D-printed carbon materials with a significant proportion of bio-based precursors, which can be easily adapted for a large number of applications.

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“…The authors believed that the interesting electrical and mechanical results are promising for the applications of bio-based carbon electrodes. Similar carbon precursors have been used by Roman et al [94] The authors have developed a new approach for the realization of graphene micro-lattices with tunable density from lignin-graphene oxide inks (Figure 34a). Alkali lignin was mixed with GO, in various ratios, to ensure a high carbon yield during carbonization of the more or less dense graphenic structure.…”

Section: Printed Structure As Sacrificial Templatementioning

confidence: 99%