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Optical diffuser constructed by assembly of cellulose ether and polymer complex particles.

Feng Lin¹, Bing Xue¹, Hao Huang¹

¹State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Center for Advanced Low-Dimension Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, China.

Carbohydrate Polymers

|July 22, 2022

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This study introduces a novel optical diffuser made from cellulose ether and polymer complex particles on a PET substrate. Thermal crosslinking significantly enhances its haze, durability, and resistance to pH, improving performance for liquid crystal displays.

Area of Science:

Materials Science
Polymer Science
Green Chemistry

Background:

Optical diffusers are crucial components in displays.
Developing sustainable and high-performance optical materials is an ongoing challenge.
Cellulose derivatives offer a promising eco-friendly alternative for optical applications.

Purpose of the Study:

To develop a novel, green optical diffuser using cellulose ether (CE) and polymer complex particles (PCP).
To investigate the effect of thermal crosslinking on the optical and durability properties of the CE/PCP film.
To evaluate the performance of the developed diffuser compared to commercial alternatives for liquid crystal displays (LCDs).

Main Methods:

Interfacial assembly of CE and PCP on a poly(ethylene terephthalate) (PET) substrate.

Keywords:

Cellulose ether Hydrogen bonding Layer-by-layer assembly Optical diffuser Polymer complexation

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Thermal treatment for crosslinking the CE/PCP complex film.

Characterization of optical properties (haze) and durability (pH resistance, anti-bending capacity).

Main Results:

The CE/PCP complex film exhibited a haze of 81% without crosslinking.
Thermal crosslinking increased the haze to 95% and improved durability, including resistance to high pH solutions.
The crosslinked CE/PCP film demonstrated superior anti-bending capacity compared to commercial optical diffusers for LCDs.

Conclusions:

A novel, sustainable optical diffuser was successfully fabricated using CE and PCP.
Thermal crosslinking is an effective strategy to enhance the optical performance and durability of cellulose-based diffusers.
The developed CE/PCP diffuser shows significant potential for applications in liquid crystal displays and other optical devices.