【摘要】：廢棄印刷線路板非金屬材料(Non-metallic Materials Recycled from Waste Printed Circuit Boards, N-WPCB)主要由玻璃纖維與熱固性塑料組成,是一種難以資源化利用的廢棄物。本文以廢棄印刷線路板非金屬材料的資源化為目的,在導向管噴動流化床中對N-WPCB顆粒進行了包覆改性,并以N-WPCB顆粒為填料、聚丙烯(PP)為基質(zhì)制備了系列PP/N-WPCB復合材料。實驗研究了N-WPCB顆粒粒徑及添加量對PP/N-WPCB復合材料性能的影響。研究表明,粒徑≤154μm的N-WPCB顆粒適宜用作PP基質(zhì)的填料,復合材料的力學性能較好。隨著N-WPCB添加量的增加,復合材料的氧指數(shù)(OI)、彎曲強度提高,拉伸強度、沖擊強度降低。綜合考慮N-WPCB的資源化利用與PP/N-WPCB復合材料的性能,選擇m(PP):m(N-WPCB)為100：40進行研究。實驗研究了改性劑對N-WPCB顆粒的改性效果,以及改性劑的作用機理。研究表明,KH-550對N-WPCB顆粒的改性效果最優(yōu),KH-560次之,NDZ-201最差。KH-550改性可以有效降低N-WPCB顆粒的表面極性,增強N-WPCB顆粒與PP基質(zhì)的相容性和界面粘結(jié)強度,進而提高PP/N-WPCB復合材料的力學性能。通過包覆后N-WPCB顆粒的粒徑及PP/N-WPCB復合材料的力學性能變化,研究了包覆改性過程中噴霧速率、霧化氣速、床層溫度、噴動氣速、流化氣速等操作參數(shù)對N-WPCB顆粒改性效果的影響,并得出了優(yōu)化的操作參數(shù)。包覆改性過程的較優(yōu)操作參數(shù)如下：噴霧速率為3.2 cm·s-1,霧化氣速為58.98m·s-1,床層溫度為80℃,噴動氣速為29.49 m·s·s-1,流化氣速為0.048m·s-1。采用PP顆粒輔助流化改善了N-WPCB顆粒在導向管噴動流化床中的流化質(zhì)量。研究表明：PP顆粒輔助流化可以強化N-WPCB顆粒的改性效果,PP/N-WPCB復合材料的力學性能也隨之提高。當混合顆粒體系中,PP顆粒與N-WPCB顆粒的質(zhì)量比為100:80,KH-550用量為4 phr時,PP/N-WPCB復合材料的力學性能達到最優(yōu)。此時,復合材料的彎曲、拉伸及沖擊強度分別為55.46 Mpa、41.556 Mpa、6.198 kJ·m-2,較改性前分別提高了16.60%、23.22%和23.64%。
[Abstract]:The waste printed circuit board nonmetallic material (Non-metallic Materials Recycled from Waste Printed Circuit Boards, N-WPCB) is mainly composed of glass fiber and thermosetting plastics. In this paper, N-WPCB particles were coated in a spouted fluidized bed with a guide tube, and N-WPCB particles were used as fillers for the purpose of recycling waste printed circuit board nonmetallic materials. A series of PP/N-WPCB composites based on polypropylene (PP) were prepared. The effects of particle size and addition of N-WPCB particles on the properties of PP/N-WPCB composites were investigated experimentally. The results showed that the N-WPCB particles with diameter 鈮，

本文編號：2311034