ABSTRACT

This paper investigates the morphology, mechanical and thermal insulation properties of textile air conditioner dust-filled polyurethane (PU) rigid foams. Textile air conditioner dust occurs during the spinning process of staple fibres. It consists of cotton fibre impurities as boll, leaf, and short fibres that generate a vast environmental load. This dust is used as a filler and dispersed in polyurethane up to 40% wt. The cell -size of foams decreased and cell -density increased by the increase in filler ratios in which the dust acted as a heterogeneous nucleation site during cell formation. The dust agglomerated in polyurethane foam and induced irregular cell wall and hence non-uniform cell formation and many broken cells. The flexural strength and modulus decreased in higher dust content (40% wt.). The lower thermal insulation of cellulose-based dust and damaged structure/uniformity of foam cells resulted in an unstable/lower thermal conductivity of dust-filled polyurethane rigid foam composites.

摘要

本文研究了纺织空调粉尘填充聚氨酯 (PU) 硬质泡沫的形态、机械和隔热性能。纺织空调粉尘发生在短纤维的纺纱过程中。它由棉纤维杂质组成，如棉铃、叶子和短纤维，产生巨大的环境负荷。这种粉尘用作填料并分散在聚氨酯中，含量高达 40% wt。随着填料比的增加，泡沫的泡孔尺寸减小，泡孔密度增加，其中粉尘在泡孔形成过程中充当异质成核位点。灰尘聚集在聚氨酯泡沫中并引起不规则的细胞壁，因此形成不均匀的细胞和许多破碎的细胞。在较高的粉尘含量（40% wt.）中弯曲强度和模量降低。