使用乙二醇(EG)和丙二醇(PG)作为醇解剂,氢氧化铯作为高效催化剂,将废旧聚氨酯直埋管道保温泡沫(PU硬泡)粉碎,并加入其中,进行降解,然后量取适当降解得到的低聚物多元醇制备出再生PU硬泡。对降解产物进行黏度测试及羟值测试,然后对制备的再生PU硬泡进行密度、压缩强度、红外光谱、扫描电镜等一系列测试并分析。通过实验结果可以看出:在m(EG)∶m(PG)=1∶1,高效催化剂氢氧化铯加入质量比为0.8%时,废旧PU硬泡达到最好的降解效果,此时再生的PU硬泡的密度低、抗压强度更高、保温性能更好,达到国家标准的要求。
Use ethylene glycol (EG) and propylene glycol (PG) as alcoholysis agents,cesium hydroxide as a high-efficiency catalyst,crushed the waste polyurethane direct-buried pipe insulation foam (SPUF),added it to it,degraded it,and then measured it.Properly degraded oligomer polyol to prepare regenerated SPUF.The degradation products were tested for viscosity and hydroxyl value.Then a series of test and analysis were performed on the density,compressive strength,infrared spectroscopy,and scanning electron microscopy of the prepared regenerated SPUF.It can be seen from the results:whenm(EG)∶m(PG)=1∶1,and the mass ratio of high-efficiency catalyst cesium hydroxide was 0.8%,the waste SPUF achieved the best degradation effect.The regenerated SPUF had low density,higher compressive strength and better heat preservation performance,which met the requirements of national standards.
[1] 翁汉元.聚氨酯工业发展状况和技术进展[J].化学推进剂与高分子材料,2008(1):1-7.
[2] Deng Yimin,Dewil Raf,Appels Lise,et al.Reviewing the thermo-chemical recycling of waste polyurethane foam[J].Journal of Environmental Management,2021,278:111527.
[3] 康新易.废聚氨酯硬泡溶剂热催化降解制备再生PU泡沫的研究[D].长春:长春工业大学,2020.
[4] Mondal P,Khakhar D V.Rigid polyurethane-clay nanocomposite foams:preparation and properties[J].Journal of Applied Polymer Science,2010,103(5):2802-2809.
[5] 喻爱和,许新华.氢氧化铯催化端炔与二替加氟二硒醚反应制备(Z)-1,2-二替加氟硒基烯烃[J].化学试剂,2020,42(11):1370-1376.
[6] Zhang Fengyuan,Liu Weiqu,Liang Liyan,et al.Application of polyether amine intercalated graphene oxide as filler for enhancing hydrophobicity,thermal stability,mechanical and anti-corrosion properties of waterborne polyurethane[J].Diamond and Related Materials,2020,109:108077.
[7] 张刚,徐金球.废旧聚氨酯泡沫回收利用技术进展[J].塑料工业,2014,42(6):12-16,49.
[8] Shafigullin L N,Romanova N V,Gabrakhmanov A T,et al.Recycling components made of polyurethane foam[J].IOP Conference Series:Materials Science and Engineering,2020,915:012051.
[9] 周继宏,吕杰,刘佳,等.聚氨酯高分子合成及应用研究进展[J].化工时刊,2019,33(12):27-31.
[10] 何金迎.硬质聚氨酯泡沫塑料的结构、形态与改性研究[D].北京:北京化工大学,2013.
[11] Wölfel Bastian,Seefried Andreas,Allen Vincent,et al.Recycling and reprocessing of thermoplastic polyurethane materials towards nonwoven processing[J].Polymers,2020,12(9):1917.
[12] Moon Junho,Kwak Sung Bok,Lee Jae Yong,et al.Synthesis of polyurethane foam from ultrasonically decrosslinked automotive seat cushions[J].Waste Management,2019,85:557-562.
[13] Gama Nuno V,Ferreira Artur,Barros-Timmons Ana.Polyurethane foams:past,present,and future[J].Materials (Basel,Switzerland),2018,11(10):1841.
[14] Khalid Mahmood Zia,Haq Nawaz Bhatti,Ijaz Ahmad Bhatti.Methods for polyurethane and polyurethane composites,recycling and recovery:a review[J].Reactive and Functional Polymers,2007,67(8):675-692.
[15] Reghunadhan A,Datta J,Jaroszewski M,et al.Polyurethane glycolysate from industrial waste recycling to develop low dielectric constant,thermally stable materials suitable for the electronics[J].Arabian Journal of Chemistry,2020,13(1):2110-2120.
[16] 许晓辰.硬质聚氨酯泡沫塑料的发展及应用[J].化工设计通讯,2020,46(3):3-4.
[17] Członka S,Bertino M F,Strzelec K.Rigid polyurethane foams reinforced with industrial potato protein[J].Polymer Testing,2018,68:135-145.
[18] Datta Janusz.Synthesis and investigation of glycolysates and obtained polyurethane elastomers[J].Journal of Elastomers and Plastics,2010,42(2):117-127.
[19] Suguru Motokucho,Akito Yamaguchi,Yu Nakayama,et al.Hydrolysis of aromatic polyurethane in water under high pressure of CO2[J].Journal of Polymer Science Part A:Polymer Chemistry,2017,55(12):2004-2010.
[20] 徐祥,沈照羽,崔胜凯,等.发泡剂对硬质聚氨酯泡沫性能的影响[J].热固性树脂,2021,36(2):31-33.
基金资助
黑龙江省教育厅项目(135409301);齐齐哈尔市科技局项目(GYGG-201902);齐齐哈尔大学研究生创新科研项目(YJSCX2019063)
PDF
