All-in-One Cellulose Nanocrystals for 3D Printing of Nanocomposite Hydrogels

2018 ◽  
Vol 130 (9) ◽  
pp. 2377-2380 ◽  
Author(s):  
Jieping Wang ◽  
Annalisa Chiappone ◽  
Ignazio Roppolo ◽  
Feng Shao ◽  
Erika Fantino ◽  
...  
Keyword(s):  
3D Printing ◽  
Cellulose Nanocrystals ◽  
Nanocomposite Hydrogels

All-in-One Cellulose Nanocrystals for 3D Printing of Nanocomposite Hydrogels

2018 ◽  
Vol 57 (9) ◽  
pp. 2353-2356 ◽  
Author(s):  
Jieping Wang ◽  
Annalisa Chiappone ◽  
Ignazio Roppolo ◽  
Feng Shao ◽  
Erika Fantino ◽  
...  
Keyword(s):  
3D Printing ◽  
Cellulose Nanocrystals ◽  
Nanocomposite Hydrogels

scholarly journals Cationic Cellulose Nanocrystals-Based Nanocomposite Hydrogels: Achieving 3D Printable Capacitive Sensors with High Transparency and Mechanical Strength

Polymers ◽  
2021 ◽  
Vol 13 (5) ◽  
pp. 688
Author(s):  
Po-Cheng Lai ◽  
Sheng-Sheng Yu
Keyword(s):  
3D Printing ◽  
Surface Chemistry ◽  
Mechanical Strength ◽  
Cellulose Nanocrystals ◽  
Soft Materials ◽  
Capacitive Sensors ◽  
Wearable Electronics ◽  
High Transparency ◽  
Physical Network ◽  
Nanocomposite Hydrogels

Hydrogel ionotronics are intriguing soft materials that have been applied in wearable electronics and artificial muscles. These applications often require the hydrogels to be tough, transparent, and 3D printable. Renewable materials like cellulose nanocrystals (CNCs) with tunable surface chemistry provide a means to prepare tough nanocomposite hydrogels. Here, we designed ink for 3D printable sensors with cationic cellulose nanocrystals (CCNCs) and zwitterionic hydrogels. CCNCs were first dispersed in an aqueous solution of monomers to prepare the ink with a reversible physical network. Subsequent photopolymerization and the introduction of Al3+ ion led to strong hydrogels with multiple physical cross-links. When compared to the hydrogels using conventional CNCs, CCNCs formed a stronger physical network in water that greatly reduced the concentration of nanocrystals needed for reinforcing and 3D printing. In addition, the low concentration of nanofillers enhanced the transparency of the hydrogels for wearable electronics. We then assembled the CCNC-reinforced nanocomposite hydrogels with stretchable dielectrics into capacitive sensors for the monitoring of various human activities. 3D printing further enabled a facile design of tactile sensors with enhanced sensitivity. By harnessing the surface chemistry of the nanocrystals, our nanocomposite hydrogels simultaneously achieved good mechanical strength, high transparency, and 3D printability.

Role of in situ added cellulose nanocrystals as rheological modulator of novel waterborne polyurethane urea for 3D-printing technology

Cellulose ◽  
2021 ◽  
Author(s):  
Julen Vadillo ◽  
Izaskun Larraza ◽  
Tamara Calvo-Correas ◽  
Nagore Gabilondo ◽  
Christophe Derail ◽  
...  
Keyword(s):  
3D Printing ◽  
Cellulose Nanocrystals ◽  
Waterborne Polyurethane ◽  
Printing Technology ◽  
3D Printing Technology

scholarly journals Printable Alginate Hydrogels with Embedded Network of Halloysite Nanotubes: Effect of Polymer Cross-Linking on Rheological Properties and Microstructure

Polymers ◽  
2021 ◽  
Vol 13 (23) ◽  
pp. 4130
Author(s):  
Svetlana A. Glukhova ◽  
Vyacheslav S. Molchanov ◽  
Boris V. Lokshin ◽  
Andrei V. Rogachev ◽  
Alexey A. Tsarenko ◽  
...  
Keyword(s):  
3D Printing ◽  
Rheological Properties ◽  
Shear Thinning ◽  
Halloysite Nanotubes ◽  
Polymer Chains ◽  
Cross Linking ◽  
Saxs Data ◽  
Nanocomposite Hydrogels ◽  
Embedded Network ◽  
The Cross

Rapidly growing 3D printing of hydrogels requires network materials which combine enhanced mechanical properties and printability. One of the most promising approaches to strengthen the hydrogels consists of the incorporation of inorganic fillers. In this paper, the rheological properties important for 3D printability were studied for nanocomposite hydrogels based on a rigid network of percolating halloysite nanotubes embedded in a soft alginate network cross-linked by calcium ions. Particular attention was paid to the effect of polymer cross-linking on these properties. It was revealed that the system possessed a pronounced shear-thinning behavior accompanied by a viscosity drop of 4–5 orders of magnitude. The polymer cross-links enhanced the shear-thinning properties and accelerated the viscosity recovery at rest so that the system could regain 96% of viscosity in only 18 s. Increasing the cross-linking of the soft network also enhanced the storage modulus of the nanocomposite system by up to 2 kPa. Through SAXS data, it was shown that at cross-linking, the junction zones consisting of fragments of two laterally aligned polymer chains were formed, which should have provided additional strength to the hydrogel. At the same time, the cross-linking of the soft network only slightly affected the yield stress, which seemed to be mainly determined by the rigid percolation network of nanotubes and reached 327 Pa. These properties make the alginate/halloysite hydrogels very promising for 3D printing, in particular, for biomedical purposes taking into account the natural origin, low toxicity, and good biocompatibility of both components.

A review on cellulose nanocrystals as promising biocompounds for the synthesis of nanocomposite hydrogels

2019 ◽  
Vol 216 ◽  
pp. 247-259 ◽  
Author(s):  
Jamileh Shojaeiarani ◽  
Dilpreet Bajwa ◽  
Alimohammad Shirzadifar
Keyword(s):  
Cellulose Nanocrystals ◽  
Nanocomposite Hydrogels

Fabrication of a highly elastic nanocomposite hydrogel by surface modification of cellulose nanocrystals

RSC Advances ◽  
2015 ◽  
Vol 5 (18) ◽  
pp. 13878-13885 ◽  
Author(s):  
Dong Yang ◽  
Xinwen Peng ◽  
Linxin Zhong ◽  
Xuefei Cao ◽  
Wei Chen ◽  
...  
Keyword(s):  
Surface Modification ◽  
Cellulose Nanocrystals ◽  
Nanocomposite Hydrogel ◽  
Efficient Strategy ◽  
Nanocomposite Hydrogels

A new and efficient strategy was first employed to fabricate highly elastic nanocomposite hydrogels by surface modification of cellulose nanocrystals.

Tunicate cellulose nanocrystals reinforced nanocomposite hydrogels comprised by hybrid cross-linked networks

2017 ◽  
Vol 169 ◽  
pp. 139-148 ◽  
Author(s):  
Tiantian Zhang ◽  
Qiaoyun Cheng ◽  
Dongdong Ye ◽  
Chunyu Chang
Keyword(s):  
Cellulose Nanocrystals ◽  
Nanocomposite Hydrogels ◽  
Hybrid Cross
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