次磷酸铝微胶囊的制备与表征
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摘要
为解决次磷酸铝(AHP)水溶性高、热稳定性差等问题,采用原位聚合法,以聚脲甲醛(PUF)为壁材,阻燃剂AHP为芯材,制备了聚脲甲醛次磷酸铝(PUFAHP)微胶囊。通过红外光谱、扫描电镜和粒径分析对PUFAHP的结构和形貌进行了表征。AHP粒子表面包覆一层PUF树脂后,棱角被淡化,粒径变大。水溶性和水接触角测试结果表明,AHP经过PUF树脂微胶囊化改性后疏水性得到增强,水溶性明显降低。热失重分析结果表明,所制备的PUFAHP微胶囊具有优良的热稳定性。
Polyurea formaldehyde aluminum hypophosphate microcapsules(PUFAHP) were prepared with polyurea formaldehyde(PUF)as the wall material and flame retardant aluminum hypophosphate(AHP)as the core material by in-situ polymerization,since AHP possesses the high water solubility and poor thermal stability.The structure and morphology of PUFAHP were characterized by Fourier transform infrared spectrometry,scanning electron microscopy and particle size test. After the AHP particles were coated with PUF resin,their edges and angles were desalinated,and the particle sizes became larger. The water-solubility test and water contact angle test indicate that the hydrophobicity of AHP increases and the water solubility decreases significantly after microencapsulation of PUF resin. Thermogravimetric analysis shows that PUFAHP microcapsules have excellent thermal stability.
Polyurea formaldehyde aluminum hypophosphate microcapsules(PUFAHP) were prepared with polyurea formaldehyde(PUF)as the wall material and flame retardant aluminum hypophosphate(AHP)as the core material by in-situ polymerization,since AHP possesses the high water solubility and poor thermal stability.The structure and morphology of PUFAHP were characterized by Fourier transform infrared spectrometry,scanning electron microscopy and particle size test. After the AHP particles were coated with PUF resin,their edges and angles were desalinated,and the particle sizes became larger. The water-solubility test and water contact angle test indicate that the hydrophobicity of AHP increases and the water solubility decreases significantly after microencapsulation of PUF resin. Thermogravimetric analysis shows that PUFAHP microcapsules have excellent thermal stability.
引文
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[5]刘成娟,陈葵,纪利俊,等.环氧树脂包覆聚磷酸铵微胶囊的制备及其对聚丙烯的阻燃效果[J].复合材料学报,2015,32(3):728-736.
[6]陈琦,王灏,陈贵军,等.聚磷酸铵微胶囊的制备及性能研究[J].山东化工,2017,46(8):3-7.
[7]莫紫玥,赵会芳,吴春良,等.三聚氰胺甲醛树脂微胶囊化聚磷酸铵制备阻燃纸的研究[J].纸和造纸,2016,35(7):35-38.
[8]LIU Z T,DAI M Q,HU Q H,et al.Effect of microencapsulated ammonium polyphosphate on the durability and fire resistance of waterborne intumescent fire-retardant coatings[J].Journal of Coatings Technology&Research,2019,16(1):135-145.
[9]李谦,郭岳,李旭清.微胶囊红磷的制备与性能研究[J].四川化工,2018(1):5-7.
[10]WU N J,XIU Z X.Surface microencapsulation modification of aluminum hypophosphite and improved flame retardancy and mechanical properties of flameretardant acrylonitrile-butadiene-styrene composites[J].RSC Advances,2015,5(61):49143-49152.
[11]WU N J,XIU Z X,DU J Y.Preparation of microencapsulated aluminum hypophosphite and flame retardancy and mechanical properties of flameretardant ABS composites[J].Journal of Applied Polymer Science,2017,134(33):12-26.
[12]GE H,TANG G,HU W Z,et al.Aluminum hypophosphite microencapsulated to improve its safety and application to flame retardant polyamide 6[J].Journal of Hazardous Materials,2015,294:186-194.
[13]胡权,刘学清,彭莎,等.微胶囊化次磷酸铝的制备及表征[J].化学与生物工程,2016,33(11):45-47.
[14]刘文杰,左迎峰,吴义强,等.间苯二酚改性木材胶粘剂的研究进展[J].中国胶粘剂,2017,26(12):42-46.
[15]LI H Y,WANG R G,HU H L,et al.Surface modification of self-healing poly(urea-formaldehyde)microcapsules using silane-coupling agent[J].Applied Surface Science,2008,255(5):1894-1900.
[16]张云飞,徐贵祥,刘辉,等.2,4,6-三羟甲基苯酚钠改性脲醛树脂的制备与表征[J].武汉工程大学学报,2016,38(3):263-267.