# Advancing Sustainable Production of High-Performance Cellulose Pulps

## TL;DR

This study shows that enzymatic hydrolysis can create high-performance cellulose pulps with less environmental impact, improving properties like strength and air permeability.

## Contribution

The study introduces optimized enzymatic hydrolysis conditions for producing high-performance cellulose pulps with sustainability benefits.

## Key findings

- Pulp composition significantly affects enzymatic treatment outcomes like fibrillation and fiber aggregation.
- Optimized enzymatic pretreatment improves tensile strength, air permeability, hydrophobicity, and internal bonding.
- Enzymatic hydrolysis offers a sustainable, energy-efficient alternative to conventional pulp production methods.

## Abstract

What are the main findings?
Enzymatic hydrolysis pretreatment of industrial pulpsPulp composition influencing the enzymatic performanceEnhanced conditions for high-performance cellulose pulps

Enzymatic hydrolysis pretreatment of industrial pulps

Pulp composition influencing the enzymatic performance

Enhanced conditions for high-performance cellulose pulps

What is the implication of the main finding?
Sustainable methodology to produce cellulose pulpsLower environmental impact and alignment with circular economic principlesImprovements in tensile strength, air permeability, hydrophobicity, and internal bonding

Sustainable methodology to produce cellulose pulps

Lower environmental impact and alignment with circular economic principles

Improvements in tensile strength, air permeability, hydrophobicity, and internal bonding

With a growing demand for renewable resources in high-performance materials, sustainable methods are preferred for their lower environmental impact and alignment with circular economy principles. Among these, enzymatic hydrolysis remains relatively underexplored yet shows strong potential for cellulose fibrillation, offering a promising route that may lower energy requirements by minimizing the need for extensive refining compared to conventional mechanical or chemical approaches. In this study, enzyme cocktails rich in cellulase and xylanase were applied to three industrial pulps, sulphite, bleached Kraft eucalyptus and thermomechanical pine, to produce high-performance cellulose pulps. Treatments were carried out using varying enzyme loads (5–40 filter paper units per gram of dry pulp, FPU/gdp) and reaction times (1–16 h). The resulting chemical composition, structural morphology, and physical–mechanical properties were systematically evaluated. The findings revealed that pulp composition strongly influenced enzymatic treatment, affecting surface fibrillation, fibre aggregation, swelling, and fibre shortening. Under optimized conditions, enzymatic pretreatment significantly enhanced paper performance, with improvements in tensile strength, air permeability, hydrophobicity, and internal bonding. Overall, enzymatic hydrolysis represents a sustainable solution and a strategy which could reduce energy expenditures to high-performance cellulose pulps, suitable as reinforcing fibres in packaging applications.