Functionalized Nanocellulose Composites for Homogeneous Dispersion

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Solution Overview

Problem

The incorporation of cellulose nanocrystals into composites is hindered by agglomeration and lack of homogeneity due to strong hydrogen bonds, leading to compromised dispersion and reduced physical and chemical properties.

Innovation Solution

Functionalization of nanocellulose with elastomer polymers, followed by freeze-drying to maintain dispersion and enhance properties like mechanical reinforcement and hydrophobicity, using a green process without chemical reagents.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If cellulose nanocrystals are incorporated into composites through extrusion processes, then the polymeric material can be processed, but the nanocrystals agglomerate during drying and dispersion is compromised

Engineering Contradiction:

Improveprocessing capabilityVSAvoiddispersion homogeneity

Core Design Contradiction:

Ease of manufactureVSStability of the object's composition

Solution Approach 1:

The patent applies preliminary action by pre-functionalizing the cellulose nanocrystals with silane coupling agents before incorporation into the composite. This pre-treatment modifies the surface chemistry of the nanocrystals to improve compatibility with the polymer matrix, preventing agglomeration during subsequent processing and drying stages while maintaining processing capability

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent employs parameter changes by modifying the surface properties of cellulose nanocrystals through chemical functionalization with silane agents. This changes the surface energy and chemical composition parameters, enabling better interfacial adhesion with the polymer matrix and preventing agglomeration during extrusion and drying processes

Inventive Principle:

Principle #35Parameter changes

2Object-affected harmful factors

If natural fibers are used to replace synthetic fibers, then biodegradability and eco-friendliness are improved, but production costs and processing difficulties increase

Engineering Contradiction:

ImprovebiodegradabilityVSAvoidproduction cost

Core Design Contradiction:

Object-affected harmful factorsVSEase of manufacture

Solution Approach 1:

The patent applies parameter changes by chemically modifying the surface properties of natural cellulose fibers through silane functionalization. This treatment alters the surface energy, hydrophobicity, and chemical reactivity parameters, improving compatibility with polymer matrices and reducing processing difficulties while maintaining the biodegradable and eco-friendly characteristics of natural fibers

Inventive Principle:

Principle #35Parameter changes

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

Achieves homogeneous distribution of nanocellulose in composites, improving mechanical, elastomeric, and water vapor barrier properties, with renewable materials and no waste generation.

Implementation Method 1

c) freezing the mixture obtained in step b

Methodology Applied

Scientific EffectFreezing: Freezing

Implementation Method 2

d) drying of the material obtained in step c

Methodology Applied

Scientific EffectDrying: Desiccation

Data Source

PatentUS20250326917A1Nanomaterials, composites, its uses and its production processes

Publication Date: 2025.10.23 CENT NACIONAL DE PESQUISA EM ENERGIA E MATERIAIS

AI summary

The present disclosure describes nanocellulose-based nanomaterials and their incorporation process into composites. Specifically, the present disclosure comprises nanocellulose functionalization processes, promoting better dispersion and homogenization of the nanomaterial in composites, as well as improving physicochemical and mechanical properties. The present disclosure lies in the fields of Chemistry and Materials Engineering.