# Multifunctional Bamboo Fiber/Epoxy Composites Featuring Integrated Superhydrophobicity and Enhanced Mechanical–Thermal Performance

## TL;DR

Researchers created a strong, water-repelling bamboo composite that could replace non-renewable materials in construction and engineering.

## Contribution

A scalable method to fabricate bamboo fiber/epoxy composites with superhydrophobicity and high mechanical-thermal performance.

## Key findings

- The composite achieved a flexural strength of 443.97 MPa and tensile strength of 324.14 MPa.
- A superhydrophobic coating achieved a water contact angle exceeding 150° and self-cleaning properties.
- The composite was produced using a multilevel modification strategy involving alkali pretreatment and resin impregnation.

## Abstract

Developing sustainable, high-performance biomass composites is crucial for replacing non-renewable structural materials. In this study, a “bamboo steel” composite was fabricated using a multilevel modification strategy involving alkali pretreatment, toughened resin impregnation, and surface functionalization. Bamboo fibers were treated to remove hemicellulose and lignin, enhancing porosity and interfacial bonding. The bamboo scaffold was subsequently impregnated with a thermo-plastic polyurethane-modified epoxy resin to create a robust, interpenetrating network. The optimized composite (treated at 80 °C) exhibited a flexural strength of 443.97 MPa and a tensile strength of 324.14 MPa, demonstrating exceptional stiffness and toughness. Furthermore, a superhydrophobic coating incorporating silica nanoparticles was applied, achieving a water contact angle exceeding 150° and excellent self-cleaning properties. This work presents a scalable strategy for producing bio-based structural materials that balance mechanical strength with environmental durability.