Nanofibrillar Cellulose Fat Absorption via Enzymatic Hydrolysis
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Solution Overview
Problem
Existing methods for producing nanofibrillar cellulose for dietary applications use toxic reagents and strong chemicals, leading to environmental pollution and unsuitable products for food, medicine, and health products due to inefficient fat and cholate absorption.
Innovation Solution
The method employs steam flash explosion to pretreat cellulose, followed by enzymatic hydrolysis and surface modification with octenyl succinic anhydride or glycidyl methacrylate to create nanofibrillar cellulose with high absorptivity to fat and cholate, avoiding the use of strong acids and bases.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If strong oxidants, strong acids and bases are used to pretreat lignocelluloses, then the crystal structure of cellulose is destroyed and reactivity is enhanced, but environmental pollution increases and the product cannot be used in food, medicine and health products
Solution Approach 1:
The patent uses enzymes as intermediary agents to break down the crystalline structure of cellulose. Instead of directly applying strong chemicals, enzymes act as biological mediators that catalyze the hydrolysis of cellulose crystallites, achieving structural modification without introducing toxic substances. This resolves the contradiction by providing an effective yet safe mechanism for enhancing cellulose reactivity.
Solution Approach 2:
The patent replaces chemical mechanisms (strong oxidants, acids, bases) with biological mechanisms (enzymatic hydrolysis). The chemical method is substituted by a biochemical process where enzymes naturally break down cellulose crystallites through hydrolysis, eliminating the need for harmful chemicals while maintaining the desired structural modification and reactivity enhancement.
2Productivity
If conventional hydrolysis methods are used, then nanofibrillar cellulose is produced, but toxic reagents and strong chemicals cause environmental pollution and limit dietary applications
Solution Approach 1:
The patent replaces conventional chemical hydrolysis methods with enzymatic hydrolysis. Instead of using sulphuric acid or other strong chemicals to break down cellulose, the invention employs cellulase enzymes to catalyze the hydrolysis reaction under mild conditions, producing nanofibrillar cellulose without toxic byproducts and enabling safe dietary applications.
Solution Approach 2:
The patent changes the reaction parameters from harsh chemical conditions (strong acids, high temperatures, high pressures) to mild biological conditions (enzymatic catalysis, moderate temperatures, neutral pH). This parameter transformation allows the same hydrolysis function to be achieved without the harmful effects of conventional methods, resolving the contradiction between productivity and environmental safety.
3Quantity of substance
If dietary fiber size is reduced to nanometer scale, then water and lipid absorption capacity increases, but conventional methods cannot produce food-grade nanocellulose
Solution Approach 1:
The patent replaces chemical nanocellulose production methods with enzymatic nanocellulose production. By using cellulase enzymes to hydrolyze cellulose into nanofibrils under food-safe conditions, the invention achieves the desired nanometer-scale dimensions for enhanced absorption capacity while ensuring the product is safe for dietary, pharmaceutical, and health applications.
4Reliability
If steam flash explosion is used to activate cellulose fibers, then hemicelluloses and lignin are removed and crystal structure is destroyed, but additional processing steps are required
Solution Approach 1:
The patent applies steam flash explosion as a preliminary treatment step before enzymatic hydrolysis. This preliminary action removes hemicelluloses and lignin, and partially disrupts the crystalline structure, making the cellulose more accessible to enzymes in the subsequent hydrolysis step. This sequential approach resolves the contradiction by preparing the material in advance to enhance the effectiveness of the main processing step.
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
This approach results in a nanofibrillar cellulose with increased specific surface area and enhanced absorptivity, suitable for dietary applications, promoting gastrointestinal health and reducing fat absorption, while minimizing environmental impact.
Implementation Method 1
The present invention uses steam flash explosion technique to activate cellulose fibers. The steam flash explosion not only removes most of hemicelluloses and part of lignin, but also effectively destroys the crystal structure of cellulose
Implementation Method 2
followed by enzymatic hydrolysis and surface modification with octenyl succinic anhydride or glycidyl methacrylate
Data Source
AI summary
The invention provides a method for making nanofibrillar cellulose with high absorptivity to fat and cholate. According to the invention, dietary fiber material is activated by steam flash explosion and hydrolyzed sequentially by xylanase, laccase and cellulase. Nanofibrillar cellulose is obtained by subjecting the hydrolyzed fiber to high pressure homogenization. Nanofibrillar cellulose is further modified by octenyl succinic anhydride or glycidyl methacrylate to increase its ability to absorb fat and cholate. The method of the invention is safe, clean and environment-friendly. It avoids using toxic reagents, strong acids and bases in the process of preparing nanofibrillar cellulose, making it safe to be used as dietary products. The nanofibrillar cellulose made by the invented method has an oil absorption rate of 20-35 g/g, a water absorption rate of 20-30 g/g, expansivity of 40-70 mL/g, and sodium deoxycholate absorption rate of 0.01-0.2 mmoL/100 mg.