改性硫酸钙晶须增强聚丙烯复合材料的制备与表征
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摘要
采用碱液对硫酸钙晶须(CSW)进行处理,增加了CSW表面的羟基数量,然后用硅烷偶联剂KH570对羟基化的CSW进行表面改性,从而在CSW表面引入双键。将CSW加入到聚丙烯(PP)中,通过熔融共混法制备复合材料。在熔融共混过程中,通过过氧化二异丙苯(DCP)分解产生自由基,引发CSW表面的双键与PP基体之间发生化学反应,从而在CSW与基体之间产生化学键合,强化了CSW与基体之间的界面相互作用,制备了高性能的CSW增强PP复合材料。通过红外光谱(FTIR)表征了改性CSW的表面性能,分析了羟基化处理和DCP对改性CSW增强PP复合材料力学性能和热性能的影响。结果表明,CSW表面的羟基化和DCP所引发的键合反应能够显著改善CSW与PP之间的界面相容性,使复合材料的力学性能和热性能得到显著提升。
Calcium sulfate whisker( CSW) was treated by sodium hydroxide in order to increase the number of hydroxyl groups on CSW surface,then a silane coupling agent( KH570) was used to modify the hydroxylated CSW to introduce unsaturated double bonds on the CSW surface. The modified CSW was melt blended with polypropylene( PP) on the presence of the initiator dicumyl peroxide( DCP),which could produce chemical bonding between CSW and PP matrix,resulting in enhanced interfacial adhesion. The surface properties of the modified CSW were characterized by Fourier transform infrared spectroscopy,and the effects of hydroxylation modification of CSW and addition of DCP on the mechanical and thermal properties of CSW/PP composite were investigated. The results showed that hydroxylation modification and chemical bonding could greatly improve the compatibility and the interfacial adhesion between CSW and PP matrix,which resulted in better mechanical and thermal properties of the resultant composite.
Calcium sulfate whisker( CSW) was treated by sodium hydroxide in order to increase the number of hydroxyl groups on CSW surface,then a silane coupling agent( KH570) was used to modify the hydroxylated CSW to introduce unsaturated double bonds on the CSW surface. The modified CSW was melt blended with polypropylene( PP) on the presence of the initiator dicumyl peroxide( DCP),which could produce chemical bonding between CSW and PP matrix,resulting in enhanced interfacial adhesion. The surface properties of the modified CSW were characterized by Fourier transform infrared spectroscopy,and the effects of hydroxylation modification of CSW and addition of DCP on the mechanical and thermal properties of CSW/PP composite were investigated. The results showed that hydroxylation modification and chemical bonding could greatly improve the compatibility and the interfacial adhesion between CSW and PP matrix,which resulted in better mechanical and thermal properties of the resultant composite.
引文
[1] WANG Y,LI Y,YUAN A,et al. Preparation of calcium sulfate whiskers by carbide slag through hydrothermal method[J]. Crystal Research&Technology,2014,49(10):800-807.
[2] ZHAO W,GAO C,GUO F,et al. Synthesis of calcium sulfate hemihydrate whiskers using oyster shells[J]. Research on Chemical Intermediates,2016,42(4):2953-2961.
[3]周健,唐己琴,孟海兵,等.聚丙烯/硫酸钙晶须复合材料的研究[J].工程塑料应用,2008,36(11):19-22.
[4] LU Y,ZHANG W,LI X,et al. Synthesis of new polyether titanate coupling agents with different polyethyleneglycol segment lengths and their compatibilization in calcium sulfate whisker/poly(vinyl chloride)composites[J]. RSC Advances,2017,7(50):31628-31640.
[5]田琴,秦舒浩,杨明,等.硅烷偶联剂对超细蒙脱土的表面改性[J].塑料,2015,44(6):35-37.
[6]杨学莉,于磊,张秀成,等.硫酸钙晶须填充PBS的力学性能与热稳定性[J].塑料,2015,44(2):48-51.
[7] LIU C,ZHAO Q,WANG Y,et al. Surface modification of calcium sulfate whisker prepared from flue gas desulfurization gypsum[J].Applied Surface Science,2016,360,Part A:263-269.
[8] WANG X L,ZHU Y M,HAN Y X,et al. Toughening of polypropylene with calcium sulfate whiskers treated by coupling agents[J].Advanced Materials Research,2009,58:225-229.
[9]于福家,王泽红,韩跃新,等.硫酸钙晶须改性环氧胶粘剂的研究[J].金属矿山,2007(3):35-36.
[10] WANG J,YANG K,LU S. Preparation and characteristic of novel silicone rubber composites based on organophilic calcium sulfate whisker[J]. High Performance Polymers,2011,23(2):141-150.
[11] LU Y,JIANG N,LI X,et al. Effect of inorganic-organic surface modification of calcium sulfate whiskers on mechanical and thermal properties of calcium sulfate whisker/poly(vinyl chloride)composites[J]. RSC Advances,2017,7(73):46486-46498.
[12] SHAN Y,SONG Q,ZHAO D,et al. Study on the inorganic-organic surface modification of potassium titanate whisker[J]. Applied Surface Science,2012,258(10):4444-4448.
[13]王晓丽,朱一民,韩跃新,等.表面处理剂对硫酸钙晶须/聚丙烯复合材料的增韧(Ⅰ)[J].东北大学学报:自然科学版,2008,29(10):1494-1497.
[14]刘晓艳,赵素芬,张莉琼,等. PBS/CaCO3复合材料的制备与性能[J].塑料,2017,46(4):26-28.
[15]李毅,袁松,张琼,等.改性硫酸钙晶须填充PP/EPDM复合材料的制备和性能研究[J].塑料科技,2016,44(1):35-38.
[16] LUO S P,CAO J,SUN W. Evaluation of Kraft lignin as natural compatibilizer in wood flour/polypropylene composites[J]. Polymer Composites,2017,38(11):2387-2394.
[17] KUBT J,RIGDAHL M,WELANDER M. Characterization of interfacial interactions in high density polyethylene filled with glass spheres using dynamic-mechanical analysis[J]. Journal of Applied Polymer Science,1990,39(7):1527-1539.
[18] TJONG S C,XU S,MAI Y W. Drop weight impact and work of fracture of short glass fiber reinforced polypropylene composites toughened with elastomer[J]. Polymer Composites,2003,24(3):437-447.
[19]朱一民,张勇,王晓丽.改性硫酸钙晶须/聚丙烯复合材料力学性能研究[J].矿产保护与利用,2015(3):46-49.
[20]沈惠玲,赵梓年,倪丽琴.界面改性剂及硫酸钙晶须对PP复合材料结晶性能的影响[J].塑料,2001(4):59-62.
[21]刘冬丽.玻纤增强SAN材料力学性能的影响因素[J].塑料,2017,46(4):12-15.
[2] ZHAO W,GAO C,GUO F,et al. Synthesis of calcium sulfate hemihydrate whiskers using oyster shells[J]. Research on Chemical Intermediates,2016,42(4):2953-2961.
[3]周健,唐己琴,孟海兵,等.聚丙烯/硫酸钙晶须复合材料的研究[J].工程塑料应用,2008,36(11):19-22.
[4] LU Y,ZHANG W,LI X,et al. Synthesis of new polyether titanate coupling agents with different polyethyleneglycol segment lengths and their compatibilization in calcium sulfate whisker/poly(vinyl chloride)composites[J]. RSC Advances,2017,7(50):31628-31640.
[5]田琴,秦舒浩,杨明,等.硅烷偶联剂对超细蒙脱土的表面改性[J].塑料,2015,44(6):35-37.
[6]杨学莉,于磊,张秀成,等.硫酸钙晶须填充PBS的力学性能与热稳定性[J].塑料,2015,44(2):48-51.
[7] LIU C,ZHAO Q,WANG Y,et al. Surface modification of calcium sulfate whisker prepared from flue gas desulfurization gypsum[J].Applied Surface Science,2016,360,Part A:263-269.
[8] WANG X L,ZHU Y M,HAN Y X,et al. Toughening of polypropylene with calcium sulfate whiskers treated by coupling agents[J].Advanced Materials Research,2009,58:225-229.
[9]于福家,王泽红,韩跃新,等.硫酸钙晶须改性环氧胶粘剂的研究[J].金属矿山,2007(3):35-36.
[10] WANG J,YANG K,LU S. Preparation and characteristic of novel silicone rubber composites based on organophilic calcium sulfate whisker[J]. High Performance Polymers,2011,23(2):141-150.
[11] LU Y,JIANG N,LI X,et al. Effect of inorganic-organic surface modification of calcium sulfate whiskers on mechanical and thermal properties of calcium sulfate whisker/poly(vinyl chloride)composites[J]. RSC Advances,2017,7(73):46486-46498.
[12] SHAN Y,SONG Q,ZHAO D,et al. Study on the inorganic-organic surface modification of potassium titanate whisker[J]. Applied Surface Science,2012,258(10):4444-4448.
[13]王晓丽,朱一民,韩跃新,等.表面处理剂对硫酸钙晶须/聚丙烯复合材料的增韧(Ⅰ)[J].东北大学学报:自然科学版,2008,29(10):1494-1497.
[14]刘晓艳,赵素芬,张莉琼,等. PBS/CaCO3复合材料的制备与性能[J].塑料,2017,46(4):26-28.
[15]李毅,袁松,张琼,等.改性硫酸钙晶须填充PP/EPDM复合材料的制备和性能研究[J].塑料科技,2016,44(1):35-38.
[16] LUO S P,CAO J,SUN W. Evaluation of Kraft lignin as natural compatibilizer in wood flour/polypropylene composites[J]. Polymer Composites,2017,38(11):2387-2394.
[17] KUBT J,RIGDAHL M,WELANDER M. Characterization of interfacial interactions in high density polyethylene filled with glass spheres using dynamic-mechanical analysis[J]. Journal of Applied Polymer Science,1990,39(7):1527-1539.
[18] TJONG S C,XU S,MAI Y W. Drop weight impact and work of fracture of short glass fiber reinforced polypropylene composites toughened with elastomer[J]. Polymer Composites,2003,24(3):437-447.
[19]朱一民,张勇,王晓丽.改性硫酸钙晶须/聚丙烯复合材料力学性能研究[J].矿产保护与利用,2015(3):46-49.
[20]沈惠玲,赵梓年,倪丽琴.界面改性剂及硫酸钙晶须对PP复合材料结晶性能的影响[J].塑料,2001(4):59-62.
[21]刘冬丽.玻纤增强SAN材料力学性能的影响因素[J].塑料,2017,46(4):12-15.