Wu B, Zhou M H
College of Environmental Science and Engineering, Donghua University, Shanghai 201620, People's Republic of China.
Waste Manag. 2009 Jan;29(1):355-9. doi: 10.1016/j.wasman.2008.03.002. Epub 2008 May 1.
The abundant and indiscriminant disposal of waste tyres has caused both health and environmental problems. In this work, we provide a new way to dispose off waste tyres by reusing the waste tyre rubber (WTR) for oil absorptive material production. To investigate this feasibility, a series of absorbents were prepared by graft copolymerization-blending method, using waste tyre rubber and 4-tert-butylstyrene (tBS) as monomers. Divinylbenzene (DVB) and benzoyl peroxide (BPO) were employed as crosslinker and initiator, respectively. The existence of graft-blends (WTR-g-tBS) was determined by FTIR spectrometry and verified using thin-layer chromatography (TLC). In addition, the thermal properties of WTR-g-tBS were confirmed by a thermogravimetric analyzer (TGA). Oil absorbency of the grafted-blends increased with increases in either feed ratio of WTR to tBS or DVB concentration. This absorbency reached a maximum of 24.0gg(-1) as the feed ratio and DVB concentration were 60/40 and 1wt%, respectively, after which it decreased. At other ratios and concentrations the absorbency decreased. The gel fraction of grafted-blends increased with increasing concentration of DVB. Oil-absorption processes in pure toluene and crude oil diluted with toluene were found to adhere to first-order absorption kinetics. Furthermore, the oil-absorption rate in diluted crude oil was observed to be lower than pure toluene.
废旧轮胎的大量随意丢弃已引发了健康和环境问题。在这项工作中，我们提供了一种新的废旧轮胎处理方法，即将废旧轮胎橡胶（WTR）用于生产吸油材料。为研究这种可行性，采用接枝共聚 - 共混法，以废旧轮胎橡胶和4 - 叔丁基苯乙烯（tBS）作为单体，制备了一系列吸附剂。分别使用二乙烯基苯（DVB）和过氧化苯甲酰（BPO）作为交联剂和引发剂。通过傅里叶变换红外光谱法（FTIR）确定接枝共混物（WTR - g - tBS）的存在，并使用薄层色谱法（TLC）进行验证。此外，通过热重分析仪（TGA）确认了WTR - g - tBS的热性能。接枝共混物的吸油率随WTR与tBS的进料比或DVB浓度的增加而增加。当进料比和DVB浓度分别为60/40和1wt%时，该吸油率达到最大值24.0 g g⁻¹，之后下降。在其他比例和浓度下，吸油率降低。接枝共混物的凝胶分数随DVB浓度的增加而增加。发现纯甲苯和用甲苯稀释的原油中的吸油过程符合一级吸收动力学。此外，观察到稀释原油中的吸油速率低于纯甲苯。
