Glyoxylated Starch Additive for Stronger Biodegradable Pulp Products

Solution Overview

Problem

Conventional paper strength additives, such as petroleum-based glyoxylate polyacrylamide, are non-renewable and non-biodegradable, limiting their environmental impact and increasing production costs due to reliance on fossil fuels.

Innovation Solution

A biodegradable glyoxylate starch composition is synthesized by reacting starch with chloroacetamide and glyoxal, enhancing the wet and dry strength of pulp and paper products through chemical modification.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Strength

If petroleum-based glyoxylate polyacrylamide and conventional paper strength additives are used, then wet and dry strength of paper products is improved, but environmental sustainability deteriorates due to non-biodegradability and reliance on fossil fuels

Engineering Contradiction:

Improvewet and dry strengthVSAvoidenvironmental impact

Core Design Contradiction:

StrengthVSObject-affected harmful factors

Solution Approach 1:

The invention changes the chemical composition parameters by replacing petroleum-based polymers with starch-based compounds. Specifically, it uses glyoxylated starch and cationic starch as strength additives, fundamentally altering the material basis from non-renewable to renewable resources while maintaining the strength-enhancing function

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent employs biodegradable starch-based additives that can break down naturally after serving their purpose, replacing persistent petroleum-based chemicals. This allows the strength additive to fulfill its function and then decompose harmlessly, eliminating long-term environmental accumulation issues

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

2Strength

If petroleum-based glyoxylate polyacrylamide is used, then paper strength is improved, but production cost increases due to reliance on fossil fuels

Engineering Contradiction:

Improvepaper strengthVSAvoidproduction cost

Core Design Contradiction:

StrengthVSEase of manufacture

Solution Approach 1:

The invention changes the raw material source from petroleum to starch, which is a renewable and generally more cost-effective resource. By using glyoxylated starch and cationic starch derived from plant sources, the patent reduces dependency on fluctuating fossil fuel prices and associated processing costs

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

Starch is inherently a more economical and accessible material compared to synthesized petroleum-based polymers. The patent leverages this cost advantage by using biodegradable starch derivatives that can be produced through established agricultural and chemical processes, reducing overall manufacturing expenses

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

3Strength

If conventional paper strength additives are used, then wet strength is improved, but biodegradability deteriorates

Engineering Contradiction:

Improvewet strengthVSAvoidbiodegradability

Core Design Contradiction:

StrengthVSDuration of action of stationary object

Solution Approach 1:

The patent employs biodegradable starch-based additives that can break down naturally after serving their purpose, replacing persistent petroleum-based chemicals. This allows the strength additive to fulfill its function and then decompose harmlessly, eliminating long-term environmental accumulation issues

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

Solution Approach 2:

The invention changes the chemical composition parameters by replacing petroleum-based polymers with starch-based compounds. Specifically, it uses glyoxylated starch and cationic starch as strength additives, fundamentally altering the material basis from non-renewable to renewable resources while maintaining the strength-enhancing function

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

The glyoxylate starch composition significantly increases the wet and dry strength of paper products, comparable to commercial additives, while being environmentally friendly and cost-effective.

Implementation Method 1

reacting starches (cationic starch or nonionic starch or anionic starch) with chloroacetamide utilizing an etherification reaction

Methodology Applied

Scientific EffectEtherification reaction: Chemical Bonding

Implementation Method 2

The starch may then be further reacted with glyoxal utilizing a chemical reaction under selected conditions to thereby form an aqueous glyoxylate starch

Methodology Applied

Scientific EffectChemical reaction: Chemical Bonding

Data Source

PatentUS20250347056A1Glycoxylated Starch Additive for Pulp Products

Publication Date: 2025.11.13 WESTERN MICHIGAN UNIVERSITY

AI summary

A glyoxylate starch may be formed by dispersing a starch in a liquid to form a starch slurry. The starch may be one or more of a cationic starch, nonionic starch, and an anionic starch. 2-chloracetamide is added to the starch slurry mixture to form a first reaction mixture. The temperature of the first reaction mixture may then be raised, and then cooled to form a modified starch, and glyoxal may be added to the modified starch solution to form a second reaction mixture that may then be stirred to produce a glyoxylate starch.