Poly(methyl methacrylate) and silica nanocomposites as new materials for polymeric optical devices

Polímeros

article

Affonso Netto, Rafael¹  Menezes, Fabrícia Faria de¹  Maciel Filho, Rubens¹  Bartoli, Julio Roberto¹ 

[1] Universidade Estadual de Campinas

关键词: polymer optical fibers;    in situ polymerization;    fumed silica;    sonication;    rheology;   

DOI  :  10.1590/0104-1428.20220009

学科分类：社会科学、人文和艺术（综合）

来源: Brazilian Academy Of Neurology

【 摘 要 】

PMMA is one of the most used polymers for optical applications, due to its well-known optical properties and low-cost. PMMA/fumed silica nanocomposites were synthesized by in situ polymerization under sonication to produce optical materials using two types of silica, a PDMS surface-modified and an unmodified one. Silica content and sonication amplitude effects on nanocomposites properties were studied by factorial experimental designs. Nanocomposites retained the high transparency of pristine PMMA, especially at lower levels of silica and sonication. Rheological analysis indicated better dispersion of the unmodified silica in PMMA. Dispersed silica in the PMMA nanocomposites decreased the PMMA refractive index by 0.012, making PMMA/fumed silica suitable for the cladding layer of PMMA-core waveguides, resulting in the total reflectance phenomenon for light guiding. Therefore, PMMA/fumed silica nanocomposites provide promising materials for polymer optical devices, such as optical fibers and panels, optical sensors and biosensors, photonic platforms, daylighting, and multi-touchscreen displays.

【 授权许可】

CC BY