Methods and compositions for polymer matrix synthesized by polycondensation
A polymer and matrix technology, applied in the field of preparing polymer matrix/packaging materials, can solve problems such as inconvenience
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Embodiment 1
[0098] Sample Preparation and Testing
[0099] Sample 1-1: (1) 0.096g of HAIP (molecular complex of 1-MCP and α-cyclodextrin; 4.5wt% 1-MCP) was added to 2.500g of polyethylene glycol diglycidyl ether and 0.814g of PAOS-MEA. Stir the mixture under high-speed mechanical stirring to form a uniform slurry; (2) keep the slurry at 70° C. to form a gel; (3) grind the above gel into powder. The release rate of 1-MCP was measured by direct exposure to liquid water or under high humidity conditions.
[0100] Sample 1-2: The entire process was similar to that described for Sample 1-1, except that the absorbent polymer, polyvinyl alcohol (PVA), was also included. The mass of HAIP is 0.095 g; the mass of polyethylene glycol diglycidyl ether is 2.506 g; the mass of PAOS-MEA is 0.755 g. The content of PVA is about 10% by weight relative to the total gel formulation.
[0101] Sample 1-3: The entire procedure was similar to that described for Sample 1-1, except that tetraethylenepentamine w...
Embodiment 2
[0113] additional control samples
[0114] Control Test 1: HAIP (1-MCP / α-CD Molecular Complex) was obtained from AgroFresh Inc., wherein 1-MCP was 4.5 wt%, based on the total weight of the sample HAIP. Three experiments were repeated to confirm the release of 1-MCP by dissolution in water for HAIP. 20 mg of HAIP was added to each of three 250 ml headspace vials. 2 ml of water was added to the vials via syringe, and the vials were mechanically shaken for 2 hours. The headspace of each of the three vials was analyzed after 2 hours and approximately 250 [mu]l of the headspace volume was sampled for analysis. In each sample, the amount of 1-MCP released from HAIP was quantified by gas chromatography-mass spectrometry with cis-2-butene as an internal standard. The data for these three samples are shown in Table 2.
[0115] Control Test 2: A saturated saline solution was used to generate a constant relative humidity in a headspace vial at a constant temperature. For example, sa...
Embodiment 3
[0121] additional test samples
[0122] Sample 3-1 (test sample): 0.096g HAIP was added to 2.500g polyethylene glycol diglycidyl ether, followed by 0.814g PAOS-MEA (see image 3 ). The mixture was thoroughly blended into a homogeneous slurry by a mechanical stirrer at 1500 rpm. Carefully exclude moisture and water throughout the reaction. The slurry was incubated at 70°C for 2 hours to form a gel. Pass the preparation through A11 base grinder to grind into powder. The average particle size of the powder is about 1 mm.
[0123] Test samples for complete release: 212 mg of sample 3-1 was added to a 250 ml headspace vial. The bottle was sealed with a Minnert diaphragm valve. 3ml of water was syringed into the bottle, which was then placed on a mechanical shaker and mixed vigorously for 24 hours. The headspace concentration of 1-MCP was analyzed at 24 hours and quantified using cis-2-butene as an internal standard. The results are shown in Table 4.
[0124]
PUM
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