Self-assembly and crystallization of double crystalline aliphatic thermoplastic biopolyurethane and its nucleation with cellulose nanocrystals

Polymer ◽  
2022 ◽  
pp. 124521
Author(s):  
Borja Fernández-d’Arlas ◽  
Ana Gabriella Arteaga ◽  
Ainara Saralegi ◽  
Maria Ángeles Corcuera ◽  
Arantxa Eceiza ◽  
...  
2021 ◽  
Vol 0 (0) ◽  
Author(s):  
C.F. Castro-Guerrero ◽  
A.B. Morales-Cepeda ◽  
M.R. Díaz-Guillén ◽  
F. Delgado-Arroyo ◽  
F.A. López-González

Abstract Cellulose nanocrystals were extracted from cotton. The cellulose nanocrystals made a self-assembly structure when dried under slow conditions, as it was revealed by the characterization made to the material. The AFM images of the nanocrystals showed that they had a changing local orientation, pointing in a preferred direction that underwent a periodic change. This periodic change resembles the orientation of a chiral nematic phase. The TEM images showed that the nanocrystals had a rod-like appearance with average length size of 98.5 nm and a diameter of 4.7 nm. The TEM characterization showed the nanocrystals with more details than AFM. In this paper, the self-assembling of CNC was observed by AFM, and further investigations were done by TEM, deconvoluting the process of CNC nanorods aggregation.


2020 ◽  
Vol 56 (85) ◽  
pp. 13001-13004
Author(s):  
Jonas Van Rie ◽  
Guillermo González-Rubio ◽  
Sugam Kumar ◽  
Christina Schütz ◽  
Joachim Kohlbrecher ◽  
...  

Self-assembly of cellulose nanocrystals (CNCs) doped with anisotropic gold nanorods (AuNRs) was studied by small-angle neutron scattering.


2020 ◽  
pp. 2000107
Author(s):  
Edurne Avellanal-Zaballa ◽  
Jorge Bañuelos ◽  
Hegoi Manzano ◽  
Jose Luis Chiara ◽  
Luis Cerdán ◽  
...  

Cellulose ◽  
2020 ◽  
Vol 27 (8) ◽  
pp. 4337-4353 ◽  
Author(s):  
Shengxue Qin ◽  
Yanan Hu ◽  
Xiujuan Tian ◽  
Yang Tian ◽  
Weizhi Liu ◽  
...  

2017 ◽  
Vol 30 (19) ◽  
pp. 1704477 ◽  
Author(s):  
Richard M. Parker ◽  
Giulia Guidetti ◽  
Cyan A. Williams ◽  
Tianheng Zhao ◽  
Aurimas Narkevicius ◽  
...  

Author(s):  
Jiawei Tao ◽  
Jiaqi Li ◽  
Xiao Yu ◽  
Lihong Wei ◽  
Yan Xu

Artificial photonic materials displaying ordered reflected color patterns are desirable in the field of photonic technologies, however, it is challenging to realize. Here we present that self-assembly of cellulose nanocrystals (CNC) in a tilted cuvette leads to the formation of rainbow color CNC films. We show that the self-organized CNC films enable simultaneous reflection of left-handed circularly polarized (LCP) and right-handed circularly polarized (RCP) light with lateral gradient transmittance ratio (LCP/RCP: 8.7–0.9) and the maximum reflectance value up to ca. 72%. This unique ambidextrous optical reflection arises from left-handed chiral photonic architectures with lateral gradient photonic bandgaps and nematic-like defects at the film-substrate interface and between left-handed photonic bandgap layers acting as a half-wavelength retarder. We demonstrate that the tilted angle self-assembly method provides a feasible step toward color patterning of CNC-based photonic films capable of ambidextrous optical reflection.


2019 ◽  
Vol 4 (1) ◽  
pp. 29-48 ◽  
Author(s):  
Michael Giese ◽  
Matthias Spengler

This review summarizes the recent achievements in the development of photonic functional materials based on cellulose nanocrystals (CNCs) and CNC templating. The unique self-assembly of CNCs into chiral nematic structures introduces photonic properties for the development of functional materials with application potential in photonic sensing, tunable reflectors or optoelectronics.


2018 ◽  
Vol 28 (45) ◽  
pp. 1803852 ◽  
Author(s):  
Pardis Rofouie ◽  
Moien Alizadehgiashi ◽  
Haridas Mundoor ◽  
Ivan I. Smalyukh ◽  
Eugenia Kumacheva

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