新型多组分聚丙烯酸酯类高吸油树脂微球的合成及性能研究

Synthesis and properties of novel multi-component polyacrylate-based high oil absorption resin microspheres

聚丙烯酸酯类吸油树脂因具有良好的吸油性、保油性而备受关注,目前研究大多集中在块材或粉末上,对微球状树脂的研究较少。微球因其加工更加方便、吸油倍率更高而备受关注。采用悬浮聚合法,通过调节软硬单体比例,维持反应体系稳定性,制备了分散性好的吸油树脂微球。以甲基丙烯酸十八烷基酯(SMA)、丙烯酸丁酯(BA)和苯乙烯(ST)为单体,二乙烯苯(DVB)为交联剂,偶氮二异丁腈(AIBN)为引发剂,环己烷(CYH)为致孔剂,合成P(SMA-co-BA-co-ST)高吸油树脂微球。采用红外光谱(FT-IR)、扫描电镜(SEM)、光学显微镜(OM)、热重分析(TG)等手段对树脂微球进行表征。结果表明:所得树脂微球分散性好、粒径均匀,比表面积大。系统分析了各因素对树脂吸油性能的影响,确定最佳反应条件:m[SMA∶BA]=3∶1、ω(ST)=25%、ω(DVB)=0.2%、ω(AIBN)=1.25%、ω(PVA)=1.25%、ω(CYH)=20%,对CCl_(4)、CHCl_(3)、CH_(2)Cl_(2)的饱和吸油倍率分别为33.50g/g、35.48g/g、22.26g/g,高于同类树脂的吸油性能,本研究将为吸油树脂的合成提供新的思路。

Polyacrylate oil absorption resin has attracted much attention because of its good oil absorption and preservation.At present,most of the research focuses on block or powder,while less research on microsphere resins.Microspheres attract much attention for their easier processing and higher oil absorption ratio.In this topic,the suspension polymerization method was used to maintain the stability of the reaction system by adjusting the proportion of soft and hard monomers,and to prepare well-dispersed oleoresin microspheres.P(SMA-co-BA-co-ST)high oil-absorbing resin microsphere was synthesized by using octadecyl methacrylate(SMA),butyl acrylate(BA)and styrene(ST)as monomers,divinylbenzene(DVB)as crosslinking agent,2-methylpropionitrile(AIBN)as initiator;and cyclohexane(CYH)as porogenic agent.The resin microsphere was characterized by FT-IR,SEM,OM,and TGA.The results showed the obtained resin microspheres had good dispersity,uniform particle size and larger specific surface area.The effects of various factors on the oil absorption resin performance were systematically analyzed,and the optimal reaction conditions were determined:m[SMA∶BA]=3∶1,ω(ST)=25%,ω(DVB)=0.2%,ω(AIBN)=1.25%,ω(PVA)=1.25%,ω(CYH)=20%.The saturated oil absorption ratios for CCl_(4),CHCl_(3) and CH_(2)Cl_(2) were 33.50g/g,35.48g/g,22.26g/g,respectively,which were higher than those of similar resins.This study provided a new idea for the synthesis of oil absorbent resins.