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石墨烯改性白炭黑填料对天然橡胶性能的影响

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白炭黑(主要成分为纳米SiO2，nano-SiO2)由于易于制取、绿色环保等优点，现被广泛用于橡胶补强中，但是白炭黑因为结构上的特点，导致其在橡胶中的分散性和补强能力比炭黑差。利用硅烷偶联剂改善白炭黑在橡胶中的分散性，并研究改性白炭黑和石墨烯(GE)的协同补强作用对天然橡胶(NR)的影响。使用助分散剂单宁酸(TA)修饰的石墨烯与使用硅烷偶联剂 KH570 改性的白炭黑通过迈克尔加成反应得到杂化填料(KS-TGE)，与天然橡胶充分混合制得KS-TGE/NR复合材料。经过测试，白炭黑经过改性后不仅改善了其在橡胶中的分散性，并且其和石墨烯制得的杂化填料与天然橡胶共混后，天然橡胶的力学性能得到提升。与未改性的nano-SiO2/NR相比，改性后的复合材料拉伸强度最高提升 36。3%，断裂伸长率最高提升 79。5%，此外KS-TGE/NR仍能保持优异的弹性和动态力学性能。
Effect of graphene-modified silica filler on the properties of natural rubber
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.

silicagraphenenatural rubbersilane coupling agenthybrid fillermechanical properties

郭竞泽、谭双美、李昱彤、刘致华、李嵩、辛振祥、赵帅、李琳

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青岛科技大学高分子科学与工程学院,山东青岛 266042

建新赵氏科技股份有限公司,浙江宁波 315600

白炭黑 石墨烯 天然橡胶 硅烷偶联剂 杂化填料 力学性能

国家自然科学基金项目国家自然科学基金项目山东省自然科学基金面上项目中国博士后科学基金项目中国博士后科学基金项目中国博士后科学基金项目建新赵氏科技股份有限公司博士后项目

5160311151703111ZR2021ME1072022M7219032021M7005532020M672014

2024

10.3976/j.issn.1002-4026.20230074

山东科学
山东省科学院

山东科学

CSTPCD
影响因子：0.266
ISSN：1002-4026
年,卷(期)：2024.37(1)
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