以下为句子列表：
英文: Single-walled carbon nanotubes (SWNTs) were opened and oxidized in the concentrated H2SO4/HNO3 mixture (volume ratio: 3:1), hydroxyl groups could be brought into the SWNTs after oxidation modification treatment, and the long-chain silane coupling agent wa
中文: 摘要采用混酸体系（浓硫酸／浓硝酸体积比为3/1）对单壁碳纳米管进行了氧化处理，并通过氧化处理后在单壁碳纳米管表面生成的羟基官能团与长链硅烷偶联剂进行反应，制备了表面有机修饰的单壁碳纳米管。
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英文: The results showed that compressive strength of sand mixture was markedly raised by using the silane coupling agent which can improve the surface contact state between sand and the binder.
中文: 试验结果表明，硅烷偶联剂可以改善黏结剂与砂粒表面的接触状态，极大地提高碱酚醛树脂砂的黏结强度。
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