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Cellulose and Pectic Polysaccharides

Cellulose and Pectic Polysaccharides

Every plant cell has a cell wall that protects the cell, provides structural support, and gives the cell shape. Cellulose, the main structural component of the plant cell wall, makes up over 30% of plant matter. It is the most abundant organic compound on earth. Cellulose is an unbranched polysaccharide composed of linear chains of glucose molecules linked by β (1→4) glycosidic bonds.
As a cell matures, its cell wall specializes according to its type. For example, the...

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Updated: Sep 4, 2025

Towards Biomimicking Wood: Fabricated Free-standing Films of Nanocellulose, Lignin, and a Synthetic Polycation

Towards Biomimicking Wood: Fabricated Free-standing Films of Nanocellulose, Lignin, and a Synthetic Polycation

Published on: June 17, 2014

Structurally Colored Radiative Cooling Cellulosic Films.

Wenkai Zhu¹, Benjamin Droguet², Qingchen Shen^2,3

¹School of Mechanical Engineering, Purdue University, West Lafayette, IN, 47906, USA.

Advanced Science (Weinheim, Baden-Wurttemberg, Germany)

|July 17, 2022

Summary

This summary is machine-generated.

Researchers developed vibrant, colored daytime radiative cooling (DRC) materials using cellulose nanocrystals. These sustainable films achieve significant cooling while offering aesthetic appeal for broader applications.

Keywords:

cellulose roll-to-roll deposition structural color sub-ambient radiative cooling sustainability

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Fabrication of Ultra-thin Color Films with Highly Absorbing Media Using Oblique Angle Deposition

Fabrication of Ultra-thin Color Films with Highly Absorbing Media Using Oblique Angle Deposition

Published on: August 29, 2017

Area of Science:

Materials Science
Nanotechnology
Sustainable Energy

Background:

Daytime radiative cooling (DRC) offers sustainable thermal management by radiating heat to space.
Current DRC materials are typically white or mirrored, limiting aesthetic applications.
Conventional colorants absorb solar radiation, negating cooling benefits.

Purpose of the Study:

To develop efficient, colored daytime radiative cooling materials.
To overcome the limitations of conventional colorants in DRC applications.
To enable aesthetically versatile and sustainable thermal management solutions.

Main Methods:

Fabrication of structurally colored films using cellulose nanocrystals (CNCs).
Utilizing photonic nanostructures for selective visible light reflection and infrared emission.
Employing a porous ethylcellulose (EC) base layer for enhanced broadband solar reflection.
Scalable manufacturing via a roll-to-roll process.

Main Results:

Achieved sub-ambient daytime cooling of -4 °C and nighttime cooling of -11 °C.
Demonstrated vibrant, fade-resistant structural color with low solar absorption (≈3%).
Attained high mid-infrared emissivity (>90%) for efficient radiative heat loss.
Validated scalable production of colored DRC materials.

Conclusions:

Structurally colored cellulose nanocrystal films provide efficient daytime radiative cooling with aesthetic versatility.
The developed materials offer a sustainable and scalable solution for advanced thermal management.
This approach overcomes the trade-off between color and cooling performance in radiative materials.