*Article* **Nano/Micro Hybrid Bamboo Fibrous Preforms for Robust Biodegradable Fiber Reinforced Plastics**

**Junsik Bang <sup>1</sup> , Hyunju Lee <sup>1</sup> , Yemi Yang <sup>1</sup> , Jung-Kwon Oh 1,2 and Hyo Won Kwak 1,2,\***

	- Seoul 08826, Korea

**Abstract:** The focus on high-strength and functional natural fiber-based composite materials is growing as interest in developing eco-friendly plastics and sustainable materials increases. An eco-friendly fibrous composite with excellent mechanical properties was prepared by applying the bamboo-derived nano and microfiber multiscale hybridization phenomenon. As a result, the cellulose nanofibers simultaneously coated the micro-bamboo fiber surface and adhered between them. The multiscale hybrid phenomenon implemented between bamboo nano and microfibers improved the tensile strength, elongation, Young's modulus, and toughness of the fibrous composite. The enhancement of the fibrous preform mechanical properties also affected the reinforcement of biodegradable fiber-reinforced plastic (FRP). This eco-friendly nano/micro fibrous preform can be extensively utilized in reinforced preforms for FRPs and other green plastic industry applications.

**Keywords:** bamboo fiber; cellulose nanofiber; adhesion; multiscale hybridization; fibrous composite
