为提升沙柳纤维/聚乳酸复合材料的界面相容性,分别采用硅烷偶联剂KH550、硅烷偶联剂KH570、钛酸酯偶联剂201、马来酸酐偶联剂对沙柳纤维进行改性处理,以聚乳酸为基体,改性沙柳纤维为增强相,通过模压成型工艺制备环境友好型沙柳/聚乳酸复合材料,研究了偶联剂类型及含量对沙柳纤维/聚乳酸复合材料力学性能的影响。结果表明:使用4种偶联剂改性的沙柳/聚乳酸复合材料界面相容性均得到改善,力学强度得到提升,偶联剂适宜质量分数均为2%,其中马来酸酐偶联剂对复合材料力学性能改善效果最好,其质量分数为2%时,复合材料的静曲强度为28.79MPa、弹性模量为3326.5MPa、冲击强度为4.351kJ/m2,较对照组分别提升了113.8%、127.9%、37.8%。
Silane coupling agent KH550,silane coupling agent KH570,titanate coupling agent 201 and maleic anhydride coupling agent were used to modify salix fibers in order to improve the interfacial compatibility of salix fiber/polylactic acid composites.Using polylactic acid as the matrix and modified salix fiber as the reinforcing phase,the environmentally friendly salix/polylactic acid composites were prepared by molding process.The effects of coupling agent types and dosages on the mechanical properties of salix fiber/polylactic acid composites were studied.The results showed that:the interfacial compatibility and the mechanical strength of salix/polylactic acid composites modified by four coupling agents were improved,and the appropriate mass fractions of coupling agents were all 2wt%,among which the maleic anhydride coupling agent exhibited the most pronounced effect on enhancing the mechanical properties of the composite material.When the mass fraction was 2wt%,the static bending strength,elastic modulus,and impact strength of the composite material were 28.79MPa,3326.5MPa,and 4.351kJ/m2,which were increased by 113.8%,127.9% and 37.8%,respectively,compared with the control group.
[1] 杨菊香,张雅欣,贾园,等.可降解高分子材料的制备及其降解机理[J].塑料,2021,50(2):108-113.
[2] 胡建鹏,邢东,郭明辉.植物纤维增强聚乳酸可生物降解复合材料研究动态[J].西南林业大学学报(自然科学版),2020,40(3):180-188.
[3] 张晓敏,王欣,胡建鹏.木塑复合材料老化机理及耐老化性能提升研究进展[J].世界林业研究,2023,36(4):64-69.
[4] Liu L,Huang G,Song P,et al.Converting industrial alkali lignin to biobased functional additives for improving fire beha-vior and smoke suppression of polybutylene succinate[J].ACS Sustainable Chemistry & Engineering,2016,4(9):4732-4742.
[5] 孙宏雨,吕兴聪,袁纳新,等.基于响应曲面法的木塑复合材料强度分析及挤出工艺优化[J].复合材料学报,2021,38(6):1838-1846.
[6] Gang D.The influence of surface treatment on the tensile and tribological properties of wood fiber-reinforced polyimide composite[J].Surface and Interface Analysis,2018,50(3):304-310.
[7] 陆鑫禹,路琴,孙东宝,等.桉木/PLA复合材料界面改性方法及其性能研究[J].化工新型材料,2022,50(7):165-169.
[8] 葛通,路琴,夏宜,等.偶联剂对稻壳粉/PLA复合板材性能的影响试验研究[J].中国农机化学报,2018,39(4):95-99.
[9] 陈亚楠,杨洋,张仲凤.界面处理对木塑复合材料力学性能影响研究[J].林产工业,2020,57(10):13-16;40.
[10] Liu Y,Guo L,Wang W,et al.Modifying wood veneer with silane coupling agent for decorating wood fiber/high-density polyethylene composite[J].Construction and Building Materials,2019,224:691-699.
[11] Yang F,Guo X,Zeng Z,et al.Sr2MgSi2O7∶Eu2+,Dy3+ phosphor-reinforced wood plastic composites with photoluminescence properties for 3D printing[J].Polymer Composites,2021,42(6):3125-3136.
[12] 武卫莉,陈丰雨.硅烷偶联剂对高密度聚乙烯/硅藻土的改性研究[J].中国塑料,2020,34(2):30-35.
[13] 张爱丽,林梅.阻燃型室内用木塑复合材料制备与性能[J].工程塑料应用,2021,49(10):148-152.
[14] Sun J,Pang Y,Yang Y,et al.Improvement of rice husk/HDPE bio-composites interfacial properties by silane coupling agent and compatibilizer complementary modification[J].Polymers,2019,11(12):1928.
[15] 李利芬,胡福,李秋玲,等.偶联剂与相容剂协同处理对马尾松木粉/PE复合材料性能的影响[J].塑料工业,2022,50(11):167-173.
[16] Li X,Qiang M,Yang M,et al.Combining fiber enzymatic pretreatments and coupling agents to improve physical and mechanical properties of hemp hurd/wood/polypropylene composite[J].Materials,2021,14(21):6384.
[17] 张克宏,肖慧.界面改性剂对PE基木塑复合材料性能的影响[J].塑料工业,2012,40(10):58-61.
[18] 张海龙.聚氯乙烯/木粉复合材料的制备及性能的研究[D].长春:长春工业大学,2016.
[19] 夏宜,路琴,葛通,等.偶联剂对PLA/竹粉复合材料的影响[J].工程塑料应用,2018,46(6):131-137.
[20] 朱东锋,李济吾,吴永贵.WF/PVC木塑复合材料理化性能的研究[J].材料导报,2011,25(S2):436-438;443.
[21] 苍琼,朱一丞,张鑫,等.高性能木塑复合材料的制备[J].工业技术与职业教育,2022,20(5):7-10.
[22] 刘翔宇,杨逸飞,徐道春,等.高填充油茶果壳基木塑复合材料的制备及力学性能[J].工程塑料应用,2024,52(1):1-7.
[23] 杜军,宋永明,张志军,等.MAH/GMA共接枝聚乳酸对木粉/PLA复合材料性能的影响[J].材料工程,2017,45(12):30-36.
[24] 王发扬,杜军,代璐,等.马来酸酐/二乙烯基苯接枝聚乳酸对微晶纤维素/聚乳酸复合材料性能的影响[J].化工学报,2019,70(1):327-335.
[25] 田普建,谢永灿,张双琳,等.玉米秸秆可降解复合材料的制备及力学性能研究[J].化工新型材料,2014,42(8):159-161.
[26] Ge Z H,Si D G,Lan Y L,et al.The effect of modifying agents on the mechanical properties of straw flour/waste plastic composite materials[J].Key Engineering Materials,2017,723:56-61.
[27] Belgacem C,Tarres Q,Espinach F X,et al.High-yield lignocellulosic fibers from date palm biomass as reinforcement in polypropylene composites:effect of fiber treatment on composite properties[J].Polymers,2020,12(6):1423.
[28] Hamdan M H M,Siregar J P,Rejab M R M,et al.Effect of maleated anhydride on mechanical properties of rice husk filler reinforced PLA matrix polymer composite[J].International Journal of Precision Engineering and Manufacturing-Green Technology,2019,6:113-124.
