Triglyceride Crystal-Coated Lipid Foam for Stable Processing
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Solution Overview
Problem
Existing lipid-based foams are unstable and difficult to process due to the lack of suitable surfactants, leading to rapid destabilization and inability to withstand mechanical forces, and current stabilization methods, such as forming rigid networks, result in undesirable textures and processing constraints.
Innovation Solution
A foam with a continuous lipid phase and porosity of 1-80% is created by cooling a liquid lipid composition comprising triglycerides to form a gel with partial crystallization, then whipping to produce gas bubbles coated in triglyceride crystals, which provide mechanical stability without a rigid network.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a rigid network of crystals is formed in the liquid lipid continuous phase to stabilize the foam, then foam stability is improved, but the ability to pump, deposit, or mix the foam without destroying the stabilizing network is worsened
Solution Approach 1:
The invention segments the stabilizing function from the bulk continuous phase by forming discrete crystal particles that adsorb at the gas-liquid interface rather than forming a continuous rigid network. These crystal-coated bubbles are dispersed throughout the liquid lipid phase, providing stability through interfacial coverage while maintaining bulk fluidity for easy processing, pumping, and mixing.
Solution Approach 2:
The invention uses crystal particles as intermediary structures that mediate between the gas bubbles and the liquid lipid continuous phase. The crystals adsorb at the interface, acting as a stabilizing layer that prevents coalescence without requiring the bulk phase to form a rigid network, thus enabling both stability and processability.
2Stability of the object's composition
If the bulk lipid is rapidly cooled to solidify and stabilize the foam, then foam stability is improved, but the foam becomes unstable before solidification and cannot withstand substantial shear forces during processing
Solution Approach 1:
The invention performs preliminary stabilization by coating gas bubbles with crystal particles before the bulk lipid solidifies. This pre-formed interfacial crystal layer provides immediate stability and mechanical strength during processing, eliminating the need to wait for bulk solidification. The foam can withstand shear forces during pumping and mixing while the continuous phase remains liquid.
Solution Approach 2:
The invention changes the stabilization mechanism from bulk solidification to interfacial crystal coating. By controlling crystal formation at the gas-liquid interface rather than in the bulk phase, the foam gains stability and shear resistance without requiring the entire continuous phase to solidify, maintaining processability while achieving structural integrity.
3Stability of the object's composition
If suitable surfactants are used to form stable interfaces between air and lipid, then foam stability is improved, but toxicity or unpleasant taste issues arise that make them unsuitable for edible foams
Solution Approach 1:
The invention employs a self-service mechanism where triglyceride crystals, which are native to the lipid system itself, automatically form and adsorb at the gas-liquid interface during cooling and aeration. These self-formed crystal structures provide stabilization without requiring external surfactant additives, eliminating toxicity and taste concerns while maintaining foam stability.
Solution Approach 2:
The invention changes the chemical composition of the interface stabilizer from external surfactant molecules to native triglyceride crystals. By controlling temperature and crystallization parameters, the system transforms the lipid's own components into interfacial stabilizers, providing edibility while achieving the required foam stability.
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 foam remains stable under mechanical processing and maintains texture integrity, allowing for soft and flowable properties while reducing fat content, without the need for additional stabilizers or surfactants.
Implementation Method 1
cooling a liquid lipid composition comprising triglycerides to form a gel with partial crystallization
Implementation Method 2
controlling the temperature of the composition such that the composition comprises triglyceride crystals, has a solid lipid content between 0.1 and 80% and forms a gel
Data Source
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AI summary
The present invention relates generally to the field of foams. One aspect of the invention provides a foam having a continuous lipid phase and a porosity of between 1 and 80 % wherein, at a temperature at which the lipid phase has a solid lipid content between 0.1 and 80% the foam comprises gas bubbles having at least 50 % of their surface occupied by crystals comprising triglycerides. Further aspects of the invention are a product comprising a foam and a process for forming a foam.