scholarly journals Native Structure of the Plant Cell Wall Utilized for Top‐Down Assembly of Aligned Cellulose Nanocrystals into Micrometer‐Sized Nanoporous Particles

2020 ◽  
Vol 41 (15) ◽  
pp. 2000201
Author(s):  
Panagiotis Spiliopoulos ◽  
Iina Solala ◽  
Timo Pääkkönen ◽  
Jani Seitsonen ◽  
Bas Bochove ◽  
...  
Keyword(s):  
Cell Wall ◽  
Plant Cell ◽  
Cellulose Nanocrystals ◽  
Plant Cell Wall ◽  
Native Structure ◽  
Top Down ◽  
Nanoporous Particles

scholarly journals Plant cell wall inspired xyloglucan/cellulose nanocrystals aerogels produced by freeze-casting

2020 ◽  
Vol 247 ◽  
pp. 116642 ◽  
Author(s):  
Z. Jaafar ◽  
B. Quelennec ◽  
C. Moreau ◽  
D. Lourdin ◽  
J.E. Maigret ◽  
...  
Keyword(s):  
Cell Wall ◽  
Plant Cell ◽  
Cellulose Nanocrystals ◽  
Plant Cell Wall ◽  
Freeze Casting

scholarly journals Direct Cryo Writing of Aerogels Via 3D Printing of Aligned Cellulose Nanocrystals Inspired by the Plant Cell Wall

2019 ◽  
Vol 3 (2) ◽  
pp. 46 ◽  
Author(s):  
Doron Kam ◽  
Michael Chasnitsky ◽  
Chen Nowogrodski ◽  
Ido Braslavsky ◽  
Tiffany Abitbol ◽  
...  
Keyword(s):  
Cell Wall ◽  
3D Printing ◽  
Plant Cell ◽  
Cellulose Nanocrystals ◽  
Plant Cell Wall ◽  
Building Blocks ◽  
Freeze Casting ◽  
Aqueous Mixture ◽  
Manufacturing Technologies ◽  
Directional Freezing

Aerogel objects inspired by plant cell wall components and structures were fabricated using extrusion-based 3D printing at cryogenic temperatures. The printing process combines 3D printing with the alignment of rod-shaped nanoparticles through the freeze-casting of aqueous inks. We have named this method direct cryo writing (DCW) as it encompasses in a single processing step traditional directional freeze casting and the spatial fidelity of 3D printing. DCW is demonstrated with inks that are composed of an aqueous mixture of cellulose nanocrystals (CNCs) and xyloglucan (XG), which are the major building blocks of plant cell walls. Rapid fixation of the inks is achieved through tailored rheological properties and controlled directional freezing. Morphological evaluation revealed the role of ice crystal growth in the alignment of CNCs and XG. The structure of the aerogels changed from organized and tubular to disordered and flakey pores with an increase in XG content. The internal structure of the printed objects mimics the structure of various wood species and can therefore be used to create wood-like structures via additive manufacturing technologies using only renewable wood-based materials.

Ultrasound Assisted Solid-Liquid Extraction Devices - Harnessing Active Ingredients from Plant materials – Overview and Analysis

2020 ◽  
Vol 13 ◽  
Author(s):  
Venkatasubramanian Sivakumar
Keyword(s):  
Mass Transfer ◽  
Cell Wall ◽  
Plant Cell ◽  
Plant Cell Wall ◽  
Liquid Extraction ◽  
Active Ingredients ◽  
Plant Materials ◽  
Ultrasound Assisted ◽  
Solid Liquid Extraction ◽  
Solid Liquid

Background: In the growing environmental concern use of natural products, efficient processes and devices are necessary. Solid-Liquid extraction of active Ingredients from Plant materials is one of the important unit operations in Chemical Engineering and need to be enhanced. Objectives: Since, these active ingredients are firmly bound to the plant cell wall membrane, which pose mass-transfer resistance and need to get detached through the use of suitable process intensification tools such as ultrasound and suitable devices. Therefore, detailed analysis and review is essential on development made in this area through Publications and Patents. Hence, the present paper illustrates the development of ultrasound assisted device for solid-liquid extraction are presented in this paper. Methods: Advantages such as % Yield, Reduction in extraction time, use of ambient conditions, better process control, avoidance or minimizing multi stage extraction could be achieved due to the use of ultrasound in extraction as compared to conventional processes. Conclusions: Use of ultrasound to provide significant improvements in the extraction of Vegetable tannins, Natural dyes for application in Leather processing has been demonstrated and reported earlier. These enhancement could be possible through various effects of ultrasound such as better flow of solvents through micro-jet formation, mass transfer enhancement due to rupture of plant cell wall membranes through acoustic cavitation, better leaching due to micro-mixing and acoustic streaming effects. This approach would minimize material wastage; thereby, leading to eco-conservation of plant materials, which is very much essential for better environment. Hence, various methods and design for application of ultrasound assisted solid-liquid extractor device are necessary.

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