Polylactic Acid Composition Pulverization Promoter
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Solution Overview
Problem
Polylactic acid compositions used in drilling applications face challenges with low hydrolysable capability and high costs due to difficulties in pulverization, as existing solutions either lack effective pulverizability or impair hydrolysable properties.
Innovation Solution
A polylactic acid composition with a low crystallinity matrix (≤40%) incorporating an organically modified polysaccharide or swollen lamellar silicate as a pulverization promoter, optimized for mechanical pulverization to enhance both hydrolysable and pulverizable properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If polylactic acid is used as a dispersion solution for drilling, then environmental compatibility is improved, but pulverizability deteriorates
Solution Approach 1:
The patent creates a composite material system combining polylactic acid with specific additives (silane coupling agents, nucleating agents, and pulverization promoters) to achieve both environmental compatibility and improved pulverizability. The composite structure allows the polylactic acid to maintain its biodegradable properties while the added components enhance its mechanical pulverization characteristics, resolving the contradiction between environmental friendliness and manufacturability.
Solution Approach 2:
The patent modifies the physical and chemical parameters of polylactic acid through controlled crystallization processes and additive incorporation. By adjusting crystallinity levels and incorporating specific promoters, the material's pulverization characteristics are enhanced without compromising its biodegradable nature, thus improving ease of manufacture while maintaining environmental compatibility.
2Ease of manufacture
If polylactic acid is pulverized repeatedly to achieve atomization, then pulverizability is improved, but manufacturing cost increases
Solution Approach 1:
The patent incorporates pulverization promoters and nucleating agents during the initial material synthesis stage, which pre-condition the polylactic acid for easier pulverization. This preliminary action eliminates the need for repeated pulverization cycles, allowing the material to be atomized in fewer steps and significantly reducing manufacturing costs while maintaining excellent pulverizability.
Solution Approach 2:
The patent introduces intermediary substances (pulverization promoters and silane coupling agents) that act as mediators between the polylactic acid matrix and the pulverization process. These intermediaries facilitate easier breakdown of the material during pulverization, reducing the number of processing steps required and lowering overall manufacturing costs.
3Strength
If highly crystalline polylactic acid is used, then mechanical strength is improved, but hydrolysable capability deteriorates
Solution Approach 1:
The patent applies local quality by creating regions of different crystallinity within the polylactic acid material. By incorporating nucleating agents and controlling crystallization locally, the material exhibits enhanced mechanical strength in specific regions while maintaining amorphous or low-crystallinity regions that preserve hydrolysable capability. This spatial differentiation resolves the contradiction between strength and biodegradability.
Solution Approach 2:
The patent creates a composite structure where highly crystalline regions provide mechanical strength and amorphous or low-crystallinity regions maintain hydrolysable capability. The composite architecture allows both properties to coexist, with the crystalline phases reinforcing the material and the amorphous phases facilitating hydrolysis and biodegradation.
4Reliability
If low crystallinity polylactic acid is used, then hydrolysable capability is improved, but mechanical strength deteriorates
Solution Approach 1:
The patent creates a composite material system where low-crystallinity or amorphous polylactic acid provides hydrolysable capability while incorporated reinforcing components (such as cellulose fibers, starch, or other biodegradable fillers) provide the necessary mechanical strength. This composite approach allows both properties to be simultaneously achieved.
Solution Approach 2:
The patent applies local quality by creating a heterogeneous structure where amorphous regions provide hydrolysable capability and specific dispersed phases or reinforced zones provide mechanical strength. The non-uniform distribution of properties within the material allows simultaneous optimization of both hydrolysis and mechanical performance.
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 composition achieves efficient mechanical pulverization into fine granules with high yield, maintaining hydrolysable capability and reducing costs, suitable for use in aqueous dispersion solutions for drilling.
Implementation Method 1
the polylactic acid composition works to promote the hydrolysable capability and exhibits excellent pulverizablity, and can be atomized by the mechanical pulverization
Implementation Method 2
the polylactic acid undergoes the hydrolysis and loses the form of the resin. Therefore, spaces (or cracks) form in the portions where the polylactic acid has permeated
Implementation Method 3
it remains under the ground, is decomposed by water or enzyme in the ground and does not adversely affect the environment
Data Source
AI summary
A polylactic acid composition of a dispersion structure using, as a matrix, a lowly crystalline or amorphous polylactic acid having a crystallinity of not more than 40%, the matrix containing, as a pulverization promotor dispersed therein, an organically modified polysaccharide or a lamellar silicate that is swollen or that is treated to be swollen.The polylactic acid composition has excellent hydrolysable capability and property of being mechanically pulverized.