石墨烯改性白炭黑填料对天然橡胶性能的影响

doi:10.3976/j.issn.1002-4026.20230074

Abstract

Abstract:

Silica (mainly comprising nano-SiO₂) is widely used in rubber reinforcement owing to its advantages of easy preparation and environmental protection. However, owing to its structural characteristics, silica has poorer dispersion and reinforcement ability than carbon black. The purpose of this paper is to present a proposal to improve the dispersion of silica in rubber using a silane coupling agent and to study the effect of synergistic reinforcement of modified silica and graphene on natural rubber. The hybrid filler KS-TGE was obtained through a Michael addition reaction between graphene modified by dispersant tannic acid and silica (KS) modified by the silane coupling agent KH570. Subsequently, the KS-TGE/NR composites were prepared by mixing KS-TGE with natural rubber. Test results showed that the modified silica improves the dispersion in rubber and the mechanical properties of natural rubber after blending with the hybrid filler prepared using graphene and natural rubber. Compared with unmodified nano-SiO₂/NR, the tensile strength of the modified composites increased by 36.3% and the elongation at break increased by 79.5%. In addition, KS-TGE/NR can maintain excellent elastic and dynamic mechanical properties.

Key words: silica, graphene, natural rubber, silane coupling agent, hybrid filler, mechanical properties

CLC Number:

TQ332.5

GUO Jingze, TAN Shuangmei, LI Yutong, LIU Zhihua, LI Song, XIN Zhenxiang, ZHAO Shuai, LI Lin. Effect of graphene-modified silica filler on the properties of natural rubber[J].Shandong Science, 2024, 37(1): 69-79.

Figures/Tables 10

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References 37

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试样	拉伸强度/ MPa	100%定伸应力/MPa	300%定伸应力/MPa	500%定伸应力/MPa	断裂伸长率/%	力最大值/N	回弹/%
KS-TGE/NR-0-1	21.20	1.40	4.70	15.30	585.78	209.20	79.70
KS-TGE/NR-1-1	22.40	1.50	5.70	17.50	570.37	183.50	79.40
KS-TGE/NR-2-1	27.20	1.70	5.60	16.60	630.49	222.70	76.40
KS-TGE/NR-3-1	27.80	1.70	6.80	19.40	590.37	220.00	77.90
KS-TGE/NR-0-0.4	26.80	1.40	4.40	15.00	621.81	220.10	80.30
KS-TGE/NR-1-0.4	28.90	1.40	4.60	14.80	627.97	234.70	80.00
KS-TGE/NR-2-0.4	27.20	1.40	4.90	14.30	665.33	220.10	79.40
KS-TGE/NR-3-0.4	27.70	1.40	5.10	15.80	634.01	223.10	79.40

试样	平均聚集体尺寸/μm	分散度/%
KS-TGE/NR-0-1	9.3	95.5
KS-TGE/NR-1-1	8.5	92.0
KS-TGE/NR-2-1	9.4	93.9
KS-TGE/NR-3-1	10.0	90.9
KS-TGE/NR-0-0.4	10.6	95.6
KS-TGE/NR-1-0.4	11.3	96.9
KS-TGE/NR-2-0.4	11.4	92.9
KS-TGE/NR-3-0.4	10.7	93.1
nano-SiO₂/NR	13.6	96.9

试样	t_g/℃	0 ℃时的tan δ	60 ℃时的tan δ
nano-SiO₂/NR	-41.14	0.148	0.029
KS-TGE/NR-0-1	-40.61	0.177	0.032
KS-TGE/NR-1-1	-41.10	0.148	0.033
KS-TGE/NR-2-1	-42.01	0.147	0.035
KS-TGE/NR-3-1	-41.20	0.156	0.040
KS-TGE/NR-0-0.4	-41.76	0.144	0.032
KS-TGE/NR-1-0.4	-42.24	0.142	0.036
KS-TGE/NR-2-0.4	-40.94	0.168	0.038
KS-TGE/NR-3-0.4	-42.36	0.137	—

Effect of graphene-modified silica filler on the properties of natural rubber

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试样	配方
试样	NR	白炭黑	KH570	TGE	硬脂酸	ZnO	防老剂4010NA	硫磺	DM	CZ
nano-SiO₂/NR	100	20	0	0.0	3.0	5.0	3.0	2.8	0.1	1.4
KS-TGE/NR-0-1	100	20	0	1.0	3.0	5.0	3.0	2.8	0.1	1.4
KS-TGE/NR-1-1	100	20	1	1.0	3.0	5.0	3.0	2.8	0.1	1.4
KS-TGE/NR-2-1	100	20	2	1.0	3.0	5.0	3.0	2.8	0.1	1.4
KS-TGE/NR-3-1	100	20	3	1.0	3.0	5.0	3.0	2.8	0.1	1.4
KS-TGE/NR-0-0.4	100	20	0	0.4	3.0	5.0	3.0	2.8	0.1	1.4
KS-TGE/NR-1-0.4	100	20	1	0.4	3.0	5.0	3.0	2.8	0.1	1.4
KS-TGE/NR-2-0.4	100	20	2	0.4	3.0	5.0	3.0	2.8	0.1	1.4
KS-TGE/NR-3-0.4	100	20	3	0.4	3.0	5.0	3.0	2.8	0.1	1.4

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