Zein Composition Extraction for High Melting Temperature Plastics

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Solution Overview

Problem

Current zein extraction methods from fermentation products yield predominantly alpha-zein, resulting in materials with low melting temperatures and brittleness, limiting their application in stronger plastic and film products due to insufficient levels of beta- and gamma-zein, which have higher cysteine content and improved physical properties.

Innovation Solution

A system and method for extracting zein compositions with higher beta- and gamma-zein content from fermentation products, involving a two-step solvent extraction process using agents like sodium hydroxide to increase cysteine levels, allowing for the production of zein compositions with up to 60% beta- and gamma-zein, enhancing their melting temperatures and plasticity.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If conventional zein extraction methods are used, then alpha-zein is efficiently extracted, but the resulting material has low melting temperature and brittleness

Engineering Contradiction:

Improveextraction efficiencyVSAvoidmaterial strength

Core Design Contradiction:

ProductivityVSStrength

Solution Approach 1:

The extraction process is divided into multiple sequential steps with different solvent compositions. First, a 50-70% ethanol solution extracts alpha-zein, followed by a 70-95% ethanol solution with sodium hydroxide to extract beta- and gamma-zein. This segmentation allows selective extraction of different zein types that have distinct solubility characteristics, resolving the contradiction between extraction efficiency and material strength.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent changes multiple parameters including solvent concentration (ethanol percentage), pH (through sodium hydroxide addition), and extraction temperature to optimize the extraction of different zein subclasses. By adjusting these parameters in sequence, the process achieves both high extraction efficiency and produces material with improved strength properties from beta- and gamma-zein enrichment.

Inventive Principle:

Principle #35Parameter changes

2Device complexity

If conventional extraction methods are used, then the process is simple, but the material exhibits brittleness and low melting temperature

Engineering Contradiction:

Improveprocess complexityVSAvoidmelting temperature

Core Design Contradiction:

Device complexityVSTemperature

Solution Approach 1:

The patent applies preliminary action by first extracting alpha-zein with lower concentration ethanol before proceeding to beta- and gamma-zein extraction. This preliminary step removes the predominant zein type that causes brittleness, allowing subsequent extraction of the heat-resistant beta- and gamma-zein varieties that raise the melting temperature without requiring complex equipment.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

Sodium hydroxide serves as an intermediary chemical that facilitates the extraction of beta- and gamma-zein from the fermentation product. The base modifies the solubility characteristics of these zein types, enabling their extraction at higher ethanol concentrations and improving the thermal properties of the final material without significantly increasing process complexity.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Ease of manufacture

If conventional extraction methods are used, then alpha-zein composition is achieved, but the material lacks durability for advanced applications

Engineering Contradiction:

Improvemanufacturing easeVSAvoidmaterial durability

Core Design Contradiction:

Ease of manufactureVSReliability

Solution Approach 1:

The extraction process is made dynamic by adjusting solvent composition and chemical additives at different stages. The process transitions from simple ethanol extraction to alkaline-enhanced extraction, allowing the manufacturer to control the zein subclass composition. This dynamic approach produces a more durable material enriched in beta- and gamma-zein while maintaining reasonable manufacturing ease through systematic process design.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent produces a composite zein material containing multiple zein subclasses (alpha-, beta-, and gamma-zein) in controlled proportions. This composite composition combines the ease of manufacture associated with conventional extraction while incorporating beta- and gamma-zein that provide enhanced durability, making the material suitable for advanced applications such as biodegradable plastics and films.

Inventive Principle:

Principle #40Composite materials

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 method effectively increases the proportion of beta- and gamma-zein in zein compositions, resulting in stronger, more durable plastics and films with higher melting temperatures, expanding their range of applications beyond traditional uses.

Implementation Method 1

Zein is a group of plant proteins that can be extracted from corn or corn-protein-containing substrates... Zein belongs to a class of proteins called prolamins, which are soluble in alcohol

Methodology Applied

Scientific EffectSolubility: Solvation