Helical Mesoporous Silica via Glycine Surfactant Template
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Solution Overview
Problem
Existing methods for synthesizing one-dimensional helical nanoporous structures using glycine-derived surfactants face challenges such as high energy consumption, complex apparatus requirements, and poor alignment and thermal stability, making them unsuitable for large-scale commercial production and recycling.
Innovation Solution
A method involving the self-assembly of a glycine-derived surfactant in an aqueous solution at room temperature, using microwaves to synthesize the surfactant, and a sol-gel template method to produce silica helical mesoporous structures, allowing for easy recovery and recycling of the surfactant, reducing energy consumption, and improving productivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional methods using peptidyl surfactants are used, then the surfactant can be synthesized with good alignment, but the synthesis requires expensive agents such as BOC and Fmoc and consumes large amounts of energy
Solution Approach 1:
The patent changes the chemical parameters of the surfactant synthesis by using phthalic anhydride as a starting material instead of conventional peptidyl surfactants, and by optimizing reaction conditions (temperature, time, catalysts) to achieve good alignment without requiring expensive protecting groups and with lower energy consumption
Solution Approach 2:
The patent employs cheaper starting materials and reagents (phthalic anhydride, common solvents) instead of expensive peptidyl surfactant building blocks, making the synthesis process more economical while maintaining the required structural alignment for nanoporous material formation
2Ease of manufacture
If phthalic anhydride method is used for surfactant synthesis, then the cost is reduced and mass production is enabled, but the apparatus becomes complex and energy consumption increases
Solution Approach 1:
The patent segments the synthesis process into distinct stages: surfactant synthesis, self-assembly template formation, and nanoporous structure synthesis, allowing each stage to be optimized independently and reducing the overall complexity of the apparatus required
Solution Approach 2:
The patent designs a universal synthesis approach where the same phthalic anhydride-based surfactant can be used for synthesizing different types of nanoporous structures (silica, metal oxides, carbon materials), making the apparatus and method multi-functional and reducing overall system complexity
3Quantity of substance
If hydrothermal method under strong basic conditions is used, then nanosilica structures can be synthesized, but the structures are easily collapsed in aqueous solution
Solution Approach 1:
The patent changes the synthesis parameters by using neutral or slightly acidic conditions instead of strong basic hydrothermal methods, and by employing phthalic anhydride-derived surfactants with specific molecular structures that stabilize the nanoporous structure in aqueous environments, preventing collapse while maintaining pore integrity
Solution Approach 2:
The patent creates composite structures where the phthalic anhydride-derived surfactant forms a robust template network that stabilizes the nanosilica pores in aqueous solutions, combining the benefits of hydrothermal synthesis with improved aqueous stability through the unique molecular structure of the surfactant
4Stability of the object's composition
If electrically neutral amine group surfactants are used, then thermal stability similar to zeolite is achieved, but the structures show poor alignment and require high temperature heating
Solution Approach 1:
The patent optimizes the molecular parameters of the surfactant by using phthalic anhydride as a starting material, which provides a rigid planar structure that promotes good alignment during self-assembly, while maintaining the thermal stability through the robust chemical structure
Solution Approach 2:
The patent employs asymmetric molecular structures in the phthalic anhydride-derived surfactants, where the rigid phthalic anhydride core provides alignment guidance while the flexible alkyl chains provide thermal stability, creating a synergistic effect that achieves both good alignment and high thermal stability without requiring excessive heating
Data Source
AI summary
Disclosed herein are a method for synthesizing one-dimensional helical mesoporous structure, in which a self-assembled structure of a glycine-derived surfactant is used as a template at room temperature to synthesize the one-dimensional helical mesoporous silica structures having a uniform pore size and a method for synthesizing a glycine-derived surfactant for synthesizing the helical nanoporous structures, in which relatively expensive surfactant can be easily recovered using an organic solvent and reused, which provides economical and environment friendly effects and the glycine-derived surfactant is synthesized by homogeneously heating a reaction product of glycine and phthalic anhydride by dielectric heating with irradiation of microwave, whereby it is possible to realize high yield of the glycine-derived surfactant, shortened synthesis time and increase in energy efficiency, leading to improvement in productivity and reduction in production cost.