Method for preparing polyester clay nano composite material
A nano-composite material and clay technology, which is applied in the field of preparation of polyester clay nano-composite materials, can solve the problems of limited range of performance improvement of nano-composite materials, reduced thermal stability of PET, and difficulty in complete peeling of lamellae, etc. Good mechanical properties and gas barrier properties, shortened polymerization time, and high polycondensation activity
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Embodiment 1-2
[0025] 6g of Na-montmorillonite was dispersed in 600g of water and stirred for 5 hours. Slowly add 6.6ml TiCl dropwise to 95.7ml HCL solution 4 , and stirred for 5 hours. 5.1 ml of the above solution was added dropwise into the suspension of montmorillonite, and the stirring was continued for 5 hours for ion exchange. After the ion exchange is completed, the montmorillonite is repeatedly centrifuged and washed with water until the pH of the centrifuged supernatant is 7 and washed with a drop of AgNO 3 Can not detect Cl - . The obtained titanium-based montmorillonite was dried at 110° C. for 5 hours, calcined at 250° C. for 2 hours, and passed through a 300-mesh sieve to obtain PET polycondensation catalyst A. Take 1.5g of catalyst A, 0.94g of cetyltriphenylphosphine, and 60g of water, and react at 80°C for 3 hours. The reaction product was repeatedly centrifuged and washed until the supernatant was washed with a drop of AgNO 3 Br was not detected - . The product was dr...
Embodiment 3-5
[0027] 20g of Na-montmorillonite was dispersed in 300g of ethylene glycol and stirred for 5 hours. Slowly add 2.2ml TiCl in 300ml ethylene glycol solution 4 , and stirred for 5 hours. Take 30ml of the above solution and add it dropwise into the suspension of montmorillonite, and continue to stir for 5 hours to carry out ion exchange. After the ion exchange is completed, the montmorillonite is repeatedly centrifuged and washed with ethylene glycol until the pH of the centrifuged supernatant is 7 and washed with a drop of AgNO 3 C1 not detected - . The obtained titanium-based montmorillonite was dried at 110° C. for 5 hours, and calcined at 250° C. for 2 hours to obtain PET polycondensation catalyst C. Take 1.5 g of catalyst C, 0.8 g of hexadecyl pyridinium bromide, and 60 g of water, and react at 80° C. for 3 hours. The reaction product was repeatedly centrifuged and washed until the supernatant was washed with a drop of AgNO 3 Br was not detected - . Dry the product at...
Embodiment 6-7
[0029] 6g of Na-montmorillonite was dispersed in 600g of water and stirred for 5 hours. Slowly add 2.2ml TiCl in 300ml ethylene glycol solution 4, and stirred for 5 hours. 18ml of the above solution was added dropwise to the suspension of montmorillonite, and the stirring was continued for 5 hours for ion exchange. After the ion exchange is completed, the montmorillonite is repeatedly centrifuged and washed with water until the pH of the centrifuged supernatant is 7 and washed with a drop of AgNO 3 C1 not detected - . The obtained titanium-based montmorillonite was dried at 110° C. for 5 hours, calcined at 250° C. for 2 hours, and passed through a 300-mesh sieve to obtain PET polycondensation catalyst F. Catalyst F1.5g, calcined at 400°C for 4h, added polyvinyl alcohol 1.2g, water 60g, reacted at 80°C for 3 hours. The reaction product was repeatedly centrifuged and washed until the supernatant was washed with a drop of AgNO 3 Br was not detected - . Dry the product at ...
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