Modulating the microstructure of waterborne polyurethanes for preparation of environmentally friendly nanocomposites by incorporating cellulose nanocrystals

Cellulose ◽  
2016 ◽  
Vol 24 (2) ◽  
pp. 823-834 ◽  
Author(s):  
Arantzazu Santamaria-Echart ◽  
Lorena Ugarte ◽  
Aitor Arbelaiz ◽  
Filomena Barreiro ◽  
Maria Angeles Corcuera ◽  
...  
Keyword(s):  
Cellulose Nanocrystals ◽  
Environmentally Friendly ◽  
Waterborne Polyurethanes

scholarly journals Environmentally friendly Au@CNC hybrid systems as prospective humidity sensors

RSC Advances ◽  
2020 ◽  
Vol 10 (58) ◽  
pp. 35031-35038
Author(s):  
Maria S. Koroleva ◽  
Chantal Tracey ◽  
Yuri A. Sidunets ◽  
Mikhail A. Torlopov ◽  
Vasily I. Mikhaylov ◽  
...  
Keyword(s):  
Hybrid Systems ◽  
Cellulose Nanocrystals ◽  
Environmentally Friendly ◽  
Hybrid Films ◽  
Humidity Sensors ◽  
Sensing Applications

Cellulose nanocrystals are a “green” support for nanogold. Hybrid films quickly and autonomously respond to changes in humidity and can be used in sensing applications.

Cellulose nanocrystals reinforced environmentally-friendly waterborne polyurethane nanocomposites

2016 ◽  
Vol 151 ◽  
pp. 1203-1209 ◽  
Author(s):  
Arantzazu Santamaria-Echart ◽  
Lorena Ugarte ◽  
Clara García-Astrain ◽  
Aitor Arbelaiz ◽  
Maria Angeles Corcuera ◽  
...  
Keyword(s):  
Cellulose Nanocrystals ◽  
Environmentally Friendly ◽  
Waterborne Polyurethane ◽  
Polyurethane Nanocomposites

Cellulose nanofiber-assisted dispersion of cellulose nanocrystals@polyaniline in water and its conductive films

RSC Advances ◽  
2016 ◽  
Vol 6 (12) ◽  
pp. 10168-10174 ◽  
Author(s):  
Shiqi Wang ◽  
Chun Wei ◽  
Yongyang Gong ◽  
Jian Lv ◽  
Chuanbai Yu ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Cellulose Nanocrystals ◽  
Cellulose Nanofibers ◽  
Environmentally Friendly ◽  
Cellulose Nanofiber ◽  
High Electrical Conductivity ◽  
Conductive Films

The cellulose nanofibers as an efficient and environmentally friendly dispersant have been proven to be an efficient way to disperse cellulose nanocrystals@polyaniline. The obtained film show high electrical conductivity.

Waterborne polyurethanes from castor oil-based polyols for next generation of environmentally-friendly hair-styling agents

2020 ◽  
Vol 142 ◽  
pp. 105588 ◽  
Author(s):  
Yi Zhang ◽  
Wenbo Zhang ◽  
Xiao Wang ◽  
Qianwen Dong ◽  
Xueyi Zeng ◽  
...  
Keyword(s):  
Castor Oil ◽  
Environmentally Friendly ◽  
Next Generation ◽  
Waterborne Polyurethanes ◽  
Hair Styling

Thermosetting polyurethanes prepared with the aid of a fully bio-based emulsifier with high bio-content, high solid content, and superior mechanical properties

2019 ◽  
Vol 21 (3) ◽  
pp. 526-537 ◽  
Author(s):  
Lingxiao Liu ◽  
Jingyi Lu ◽  
Yi Zhang ◽  
Haiyan Liang ◽  
Dunsheng Liang ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Environmentally Friendly ◽  
Solid Content ◽  
Synthetic Route ◽  
High Solid Content ◽  
High Solid ◽  
Waterborne Polyurethanes ◽  
Superior Mechanical Properties

The green synthetic route developed in this study offers a new platform for environmentally friendly emulsifiers for waterborne polyurethanes.

Waterborne polyurethanes from self-catalytic tartaric acid-based polyols for environmentally-friendly sizing agents

2021 ◽  
pp. 100849
Author(s):  
Shengtao Dai ◽  
Peikun Li ◽  
Xuyang Li ◽  
Chen Ning ◽  
Lingqiang Kong ◽  
...  
Keyword(s):  
Tartaric Acid ◽  
Environmentally Friendly ◽  
Waterborne Polyurethanes ◽  
Sizing Agents

scholarly journals Preparation and characterization of bionanocomposite films based on wheat starch and reinforced with cellulose nanocrystals

Cellulose ◽  
2021 ◽  
Author(s):  
Belén Montero ◽  
Maite Rico ◽  
Luis Barral ◽  
Rebeca Bouza ◽  
Joaquín López ◽  
...  
Keyword(s):  
Cellulose Nanocrystals ◽  
Food Packaging ◽  
Environmentally Friendly ◽  
Casting Process ◽  
Barrier Properties ◽  
Gas Diffusion ◽  
Wheat Starch ◽  
Bionanocomposite Films ◽  
Short Time

AbstractIn recent times, the attention of scientific community has been focusing on the replacement of petroleum-based polymers by others more environmentally friendly. In this sense, bionanocomposites based on glycerol-plasticized wheat starch and reinforced with cellulose nanocrystals (CNCs) were prepared by a solvent-casting process to obtain environmentally friendly films. The plasticization process was proven to be complete in the conditions used and no residual crystallinity was observed in any case. The incorporation of CNCs leads to materials with increased rigidity (about 1000% increment in modulus) which is related to a good filler-matrix interaction and to the formation of a rigid crystalline network of cellulose. This fact allowed also to improve the moisture resistance and the barrier properties (in both, oxygen and water vapor as permeant) of the bionanocomposite films due to the formation of a tortuous path, which prevent the gas diffusion. Moreover, the thermal stability of films was not affected by the filler incorporation. These improvements in the properties make these films susceptible to be used in short-time applications in the food packaging industry.

scholarly journals Polymer-Decorated Cellulose Nanocrystals as Environmentally Friendly Additives for Olefin-Based Drilling Fluids

2020 ◽  
Vol 22 (1) ◽  
pp. 352
Author(s):  
José Aurélio Pinheiro ◽  
Nívia do Nascimento Marques ◽  
Marcos Antônio Villetti ◽  
Rosangela de Carvalho Balaban
Keyword(s):  
Confocal Microscopy ◽  
Zeta Potential ◽  
Cellulose Nanocrystals ◽  
Environmentally Friendly ◽  
Cotton Fibers ◽  
Drilling Fluids ◽  
X Ray Diffraction ◽  
X Ray ◽  
Lower Volume ◽  
Hydrolysis Of

In this study, we intended to evaluate the performance of olefin-based drilling fluids after addition of cellulose nanocrystal (CNC) derivatives. For this purpose, firstly, cellulose nanocrystals, produced from sulfuric acid hydrolysis of cotton fibers, were functionalized with poly(N-isopropylacrylamide) (PNIPAM) chains via free radicals. The samples were then characterized via Fourier transform infrared spectroscopy (FTIR), nuclear magnetic resonance (NMR), X-ray diffraction (XRD), thermogravimetric analysis (TGA), confocal microscopy, dynamic light scattering (DLS), and zeta potential measurements in water. The FTIR and NMR spectra exhibited the characteristic signals of CNC and PNIPAM groups, indicating successful grafting. As expected, X-ray diffractograms showed that the crystallinity of CNCs reduces after chemical modification. TGA revealed that the surface-functionalized CNCs present higher thermal stability than pure CNCs. The confocal microscopy, zeta potential, and DLS results were consistent with the behavior of cellulose nanocrystals decorated by a shell of PNIPAM chains. The fluids with a small amount of modified CNCs presented a much lower volume of filtrate after high-temperature and high-pressure (HTHP) filtration tests than the corresponding standard fluid, indicating the applicability of the environmentally friendly particles for olefin-based drilling fluids.

Properties of rosin-based waterborne polyurethanes/cellulose nanocrystals composites

2013 ◽  
Vol 96 (2) ◽  
pp. 510-515 ◽  
Author(s):  
He Liu ◽  
Shuqin Cui ◽  
Shibin Shang ◽  
Dan Wang ◽  
Jie Song
Keyword(s):  
Cellulose Nanocrystals ◽  
Waterborne Polyurethanes

An Environmentally Friendly and Economical Strategy to Cyclically Produce Cellulose Nanocrystals with High Thermal Stability and High Yield

2021 ◽  
Author(s):  
Feng Tang ◽  
Yingzhan Li ◽  
Junwen Huang ◽  
Jinhong Tang ◽  
Xinyi Chen ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Ferric Chloride ◽  
Cellulose Nanocrystals ◽  
Low Cost ◽  
Environmentally Friendly ◽  
High Thermal Stability ◽  
High Yield ◽  
Fecl3 Solution

Cellulose nanocrystals (CNCs) have been widely used in various industries; however, green, efficient, low-cost and recyclable CNC preparation still faces great challenges. Herein, ferric chloride (FeCl3) solution was used as...

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