南京林业大学学报(自然科学版)
南京林業大學學報(自然科學版)
남경임업대학학보(자연과학판)
JOURNAL OF NANJING FORESTRY UNIVERSITY(NATURAL SCIENCE EDITION)
2014年
3期
115-119
,共5页
李文燕%张双保%任文涵%王戈%程海涛
李文燕%張雙保%任文涵%王戈%程海濤
리문연%장쌍보%임문함%왕과%정해도
纳米碳酸钙%浸渍%竹塑复合材料%单根竹纤维%拉伸性能
納米碳痠鈣%浸漬%竹塑複閤材料%單根竹纖維%拉伸性能
납미탄산개%침지%죽소복합재료%단근죽섬유%랍신성능
CaCO3 nanoparticles%impregnation%bamboo-plastic composites%individual bamboo fiber%tensile properties
研究了纳米碳酸钙浸渍改性对单根竹纤维表面碳酸钙附着情况、拉伸性能以及竹纤维/聚丙烯复合材料拉伸性能的影响,并将改性效果与纳米碳酸钙原位沉积改性进行对比。结果表明,纳米碳酸钙浸渍改性可以使碳酸钙颗粒均匀填充竹纤维表面微孔、褶皱等缺陷部位,附着的碳酸钙颗粒粒径均匀,分散性较好,附着量达到21?39%。经浸渍改性的单根竹纤维力学性能有所提高,拉伸强度、弹性模量、断裂伸长率分别提高了15?98%、22?15%和5?21%,但提高幅度低于原位沉积改性。分别将纳米碳酸钙浸渍、原位沉积改性竹纤维与聚丙烯薄膜制成竹塑复合材料,通过断面形貌观察发现两种改性方法均可改善竹纤维与聚丙烯的界面结合性能,复合材料拉伸性能相应提高,浸渍改性使复合材料拉伸强度和弹性模量分别提高了6?95%和15?80%,原位沉积改性分别提高18?68%和25?41%。虽然浸渍改性效果低于原位沉积改性,但工艺更简单。
研究瞭納米碳痠鈣浸漬改性對單根竹纖維錶麵碳痠鈣附著情況、拉伸性能以及竹纖維/聚丙烯複閤材料拉伸性能的影響,併將改性效果與納米碳痠鈣原位沉積改性進行對比。結果錶明,納米碳痠鈣浸漬改性可以使碳痠鈣顆粒均勻填充竹纖維錶麵微孔、褶皺等缺陷部位,附著的碳痠鈣顆粒粒徑均勻,分散性較好,附著量達到21?39%。經浸漬改性的單根竹纖維力學性能有所提高,拉伸彊度、彈性模量、斷裂伸長率分彆提高瞭15?98%、22?15%和5?21%,但提高幅度低于原位沉積改性。分彆將納米碳痠鈣浸漬、原位沉積改性竹纖維與聚丙烯薄膜製成竹塑複閤材料,通過斷麵形貌觀察髮現兩種改性方法均可改善竹纖維與聚丙烯的界麵結閤性能,複閤材料拉伸性能相應提高,浸漬改性使複閤材料拉伸彊度和彈性模量分彆提高瞭6?95%和15?80%,原位沉積改性分彆提高18?68%和25?41%。雖然浸漬改性效果低于原位沉積改性,但工藝更簡單。
연구료납미탄산개침지개성대단근죽섬유표면탄산개부착정황、랍신성능이급죽섬유/취병희복합재료랍신성능적영향,병장개성효과여납미탄산개원위침적개성진행대비。결과표명,납미탄산개침지개성가이사탄산개과립균균전충죽섬유표면미공、습추등결함부위,부착적탄산개과립립경균균,분산성교호,부착량체도21?39%。경침지개성적단근죽섬유역학성능유소제고,랍신강도、탄성모량、단렬신장솔분별제고료15?98%、22?15%화5?21%,단제고폭도저우원위침적개성。분별장납미탄산개침지、원위침적개성죽섬유여취병희박막제성죽소복합재료,통과단면형모관찰발현량충개성방법균가개선죽섬유여취병희적계면결합성능,복합재료랍신성능상응제고,침지개성사복합재료랍신강도화탄성모량분별제고료6?95%화15?80%,원위침적개성분별제고18?68%화25?41%。수연침지개성효과저우원위침적개성,단공예경간단。
The objective of this research was to investigate the influence of bamboo fibers modified by impregnating with CaCO3 nanoparticles on the adsorption situation of CaCO3 particles and tensile properties of individual bamboo fiber as well as its composites. Effects of impregnated modification and in situ modification were compared. The results indicated that impregnated modification could make CaCO3 particles which were good dispersion with uniform size fill the micropore and fold of the bamboo fibers to reduce manufacture defect. CaCO3 loading reached 21?39%, tensile strength, modulus of elasticity and elongation of impregnated modified individual bamboo fiber increased significantly by 15?98%, 22?15%and 5.21%, respectively, but were below tensile properties of in situ modified fiber. By inspect and analysis to fracture morphology, the interfacial compatibility of composites which made from modified bamboo fiber and polypropylene film were improved. Tensile properties of the composites were enhanced accordingly. The tensile strength and tensile modulus of the composites reinforced with impregnated fibers increased by 6. 95% and 15. 80%, respectively, while the composites reinforced with in situ deposited CaCO3 increased by 18.68% and 25.41%, compared to those reinforced with untreated fibers. In situ modification showed better improvement of mechanical properties both of individual bamboo fiber and composites. The process of impregnated modification was much easier.