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Preparation and properties of the phenolic foams with controllable nanometer pore structure

机译:可控制纳米孔结构的酚醛泡沫的制备与性能

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摘要

Phenolic foam with nanometer pore structure and high strength was prepared by using a novel foaming method of phenol-formaldehyde novolac resin solution under pressure. Pore structure and the effects of pressure and resin concentration on it were investigated. Results showed that the mean pore size decreases from 800 to 30 nm with the increase of resin concentration from 0.08 to 0.36 g/mL. The pressure has a great effect on the pore structure and an optimal range (2.0-4.0 MPa) at which the pore size is small in level of nanometer and has a good distribution. The nanometer pore structure resulted in significant improvement of compressive strength and thermal insulation properties of phenolic foam.
机译:采用新型的酚醛酚醛清漆树脂溶液加压发泡方法,制备了具有纳米孔结构和高强度的酚醛泡沫。研究了孔结构以及压力和树脂浓度对其的影响。结果表明,随着树脂浓度从0.08 g / mL增加到0.36 g / mL,平均孔径从800 nm减小到30 nm。压力对孔结构有很大的影响,并且在最佳范围(2.0-4.0 MPa)下,孔径在纳米范围内较小并且分布良好。纳米孔结构极大地改善了酚醛泡沫的抗压强度和隔热性能。

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