改性聚丙烯纤维的制备及其对苯系物的吸附

分别采用熔融接枝法和共混法制备聚丙烯(PP)/苯乙烯(St)改性纤维(PP-g-St)和聚丙烯/聚苯乙烯(PS)改性纤维(PP/PS),研究了熔融接枝条件对St接枝率的影响,考察了PP纤维、PP/PS纤维和PP-g-St纤维对纯苯系物和水中乳化、溶解态苯系物的吸附性能,并探讨了再生后的重复吸附性能。实验结果表明:PP熔融接枝St的最优配比为w(St)=9%,w(过氧化二异丙苯)=0.5%,此时St接枝率为4.7%,且能顺利纺丝;相比于PP纤维,PP-g-St纤维和PP/PS纤维对纯苯系物和水中乳化、溶解态苯系物的吸附量显著提高;吸油饱和的PP-g-St纤维和PP/PS纤维通过离心法再生5次后吸附性能再生率仍能够分别达到82.0%和87.6%。

Preparation of modified polypropylene fibers and adsorption of benzene series compounds

Polypropylene（PP）/styrene（St）modified fiber （PP-g-St）and polypropylene/polystyrene（PS）modified fiber （PP/PS）were prepared by melt grafting and blending,respectively. The effects of melt grafting parameters on grafting rate of St were studied. The adsorption capabilities of PP fibers,PP/PS fibers and PP-g-St fibers to pure,emulsified and water-dissolved benzene series compounds were evaluated. Besides,their repeat adsorption capabilities after regeneration were investigated. The experimental results indicated that：Under the optimum conditions for melt grafting of PP to St of w（St）=9 %,w（DCP）= 0.5%,the grafting rate of St was 4.7% which could be spun smoothly;The adsorption capacities of PP-g-St fibers and PP/PS fibers to pure,emulsified and water-dissolved benzene series compounds were significantly greater than that of PP fibers;After the saturated PP-g-St fibers and PP/PS fibers were regenerated by centrifugation for 5 times,their regeneration rate of adsorption capability could reach 82.0% and 87.6%,respectively.