Effect of modified red mud on microstructure and mechanical properties of butadiene-styrene rubber composites

doi:10.16085/j.issn.1000-6613.2018-1953

Abstract

Abstract:

SBR composites filled with sintered red mud separately modified by stearic acid, aluminate coupling agent，silane coupling agent and sodium dodecyl benzene sulfonate modifier in a ball mill were prepared by melt blending. Surface nature, microstructure and mechanical properties of the modified red mud and red mud /SBR composites were characterized. Results showed that the particle size of the red mud reduced and surface functional groups changed after ball milling modification. The functional groups of Si—O—C, Si—O—Si and the antennae increased significantly in red mud modified by silane coupling agent. The modified red mud showed good dispersibility and compatibility, and the mechanical properties of the red mud-filled rubber composites modified by the silane coupling agent increased significantly. The tensile and tear strengths were increased from 1.6MPa and 8.8kN/m of pure rubber to 9.8MPa and 21.6kN/m, respectively.

Key words: modifier, modified red mud, rubber composite, microstructure, mechanical property

摘要：

烧结法赤泥分别经硬脂酸、铝酸酯偶联剂、硅烷偶联剂和十二烷基苯磺酸钠湿法球磨改性后，与丁苯橡胶（SBR）进行熔融共混，制得改性赤泥/SBR复合材料，然后对改性赤泥和赤泥/SBR复合材料的表面性质、微观结构和力学性能进行表征测试。结果表明：球磨改性后的赤泥粒度减小，表面官能团含量发生变化。经硅烷偶联剂改性的赤泥，Si—O—C和Si—O—Si官能团含量增加，触角明显增大；改性赤泥在丁苯胶复合材料中分散性和相容性增加，硅烷偶联剂改性后的赤泥填充橡胶复合材料的力学性能显著增加，拉伸和撕裂强度分别由纯胶的1.6MPa和8.8 kN/m²增加到9.8MPa和21.6kN/m²，改性赤泥补强效果较为明显。

关键词: 改性剂, 改性赤泥, 橡胶复合材料, 微观结构, 力学性能

CLC Number:

TB332

Shicheng YANG, Qi SUN, Lunjian CHEN, Yulong ZHANG, Xiaoxiao XUE, Guiyun YI. Effect of modified red mud on microstructure and mechanical properties of butadiene-styrene rubber composites[J]. Chemical Industry and Engineering Progress, 2019, 38(07): 3297-3303.

杨世诚, 孙琦, 谌伦建, 张玉龙, 薛晓晓, 仪桂云. 赤泥改性及其对丁苯橡胶复合材料微观结构和力学性能的影响[J]. 化工进展, 2019, 38(07): 3297-3303.

Figures/Tables 11

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样品	D₁₀/μm	D₅₀/μm	D₉₀/μm	D₉₈/μm
YL	0.83	2.75	9.88	17.99
GW	0.63	1.38	2.80	3.88
YZS	0.91	2.1	4.13	5. 64
BHS	0.95	3.03	8.36	13.30
LSZ	0.96	3.34	9.95	16.25

样品	D₁₀/μm	D₅₀/μm	D₉₀/μm	D₉₈/μm
YL	0.83	2.75	9.88	17.99
GW	0.63	1.38	2.80	3.88
YZS	0.91	2.1	4.13	5. 64
BHS	0.95	3.03	8.36	13.30
LSZ	0.96	3.34	9.95	16.25

样品	接触角/（o）
YL	33.1
LSZ	72.6
BHS	32.5
GW	73.4
YZS	70.3

样品	接触角/（o）
YL	33.1
LSZ	72.6
BHS	32.5
GW	73.4
YZS	70.3

样品	原子含量/%					原子比例/%
样品	O1s	N1s	C1s	Si2p	Al2p	O1s/Al2p	N1s/Al2p	C1s/Al2p	Si2p/Al2p
YL	56.69	0.47	33.68	7.22	1.94	29.22	0.24	17.36	3.72
GW	48.38	0.36	40.70	8.15	1.51	32.04	0.24	26.95	5.40