润滑科技信息平台

专利摘要

一种高耐磨石墨烯改性天然橡胶及其制备方法。石墨烯改性天然橡胶由100重量份的改性天然橡胶共混物、A重量份的改性氧化石墨烯、35-65重量份的耐磨炭黑、5-20重量份的石墨烯改性天然橡胶制成。耐磨填料、氧化锌2-7重量份、硬脂酸1-4重量份、聚(1,2-二氢-2,2,4-三甲基喹啉)1-4重量份、1 N-异丙基-N'-苯基对苯二胺-4重量份、硫化促进剂1-4重量份、硫磺1-2重量份、相容剂0.1-3重量份和1 -7重量份的橡胶加工油,其中A大于0且等于或小于3。 ......

基本信息

专利类型:
发明专利
申请/专利号:
US18/060657
申请日期:
2022-12-01
专利申请人:
分类号:
C08F36/08 ; C08K3/04 ; C08K3/22 ; C08K5/09 ; C08K5/3465 ; C08K5/18 ; C08K3/06 ; C08K9/04 ; C08K5/44 ; C08F36/06 ; C08K5/14 ; C08J3/22
发明/设计人:
LIU, YAQING ， ZHOU, SHAOFENG ， ZHAO, GUIZHE
权利要求: 1. A wear-resistant graphene-modified natural rubber, wherein the wear-resistant graphene-modified natural rubber is prepared from 100 parts by weight of a modified natural rubber blend, A parts by weight of modified graphene oxide, 35-65 parts by weight of a first wear-resistant filler, 5-20 parts by weight of a second wear-resistant filler, 2-7 parts by weight of zinc oxide, 1-4 parts by weight of stearic acid, 1-4 parts by weight of poly(1,2-dihydro-2,2,4-trimethylquinoline) (antioxidant RD), 1-4 parts by weight of N-isopropyl-N′-phenyl-p-phenylenediamine (antioxidant 4010NA), 1-4 parts by weight of a vulcanization accelerator, 1-2 parts by weight of sulphur, 0.1-3 parts by weight of a compatibilizer and 1-7 parts by weight of a rubber processing oil; wherein A is greater than 0 and equal to or less than 3; and the first wear-resistant filler is carbon black.2. The wear-resistant graphene-modified natural rubber of claim 1, wherein the modified natural rubber blend consists of a natural rubber and a synthetic rubber in a weight ratio of (9-1):(1-2); and the synthetic rubber is selected from the group consisting of cis-polybutadiene rubber, styrene butadiene rubber, nitrile butadiene rubber, ethylene propylene diene monomer rubber, trans-1,4-poly (butadiene-co-isoprene) copolymer rubber, butyl rubber, silicone rubber and a combination thereof.3. The wear-resistant graphene-modified natural rubber of claim 1, wherein the modified graphene oxide is prepared through steps of:dissolving a sulfenamide vulcanization accelerator with anhydrous ethanol to obtain a sulfenamide vulcanization accelerator solution, wherein a weight ratio of the sulfenamide vulcanization accelerator to the anhydrous ethanol is 1:(0.2-0.5); mixing graphene oxide with deionized water to obtain a graphene oxide suspension, wherein a weight ratio of the graphene oxide to the deionized water is 2:(0.5-1); adding the sulfenamide vulcanization accelerator solution into the graphene oxide suspension followed by reaction at 60-80° C. under stirring for 1-3 h to obtain a reaction mixture; and subjecting the reaction mixture to vacuum filtration, washing, centrifugation and drying to obtain the modified graphene oxide.4. The wear-resistant graphene-modified natural rubber of claim 3, wherein the sulfenamide vulcanization accelerator is N-cyclohexyl-2-benzothiazolesulfenamide, N-(oxydiethylene)-2-benzothiazolesulfenamide (NOBS), or a combination thereof; and a weight ratio of the sulfenamide vulcanization accelerator to the graphene oxide is (5-7):15. The wear-resistant graphene-modified natural rubber of claim 1, wherein the carbon black is carbon black N110, carbon black N220, carbon black N234, carbon black N326, carbon black N330, carbon black N375, or a combination thereof.6. The wear-resistant graphene-modified natural rubber of claim 1, wherein the second wear-resistant filler is selected from the group consisting of molybdenum disulfide, carbon fiber powder, carbon nanotubes, silicon dioxide, zinc oxide whiskers, fly ash, kaolin, clay, and a combination thereof.7. The wear-resistant graphene-modified natural rubber of claim 1, wherein the compatibilizer is 3-aminopropyltriethoxysilane, maleic anhydride grafted polybutadiene, dicumyl peroxide, or a combination thereof.8. The wear-resistant graphene-modified natural rubber of claim 1, wherein the vulcanization accelerator is N-(oxydiethylene)-2-benzothiazolesulfenamide (NOBS), tetramethyl thiuramdisulfide (TMTD), 2-mercaptobenzothiazole, N-cyclohexyl-2-benzothiazole sulfenamide (CBS), or a combination thereof.9. A method for preparing the wear-resistant graphene-modified natural rubber of claim 1, comprising:(S1) dispersing the modified graphene oxide in deionized water to obtain a modified graphene oxide suspension; diluting a natural rubber latex with deionized water to obtain a natural rubber latex dilution with a weight percentage of 15-25%; and adding the modified graphene oxide suspension into the natural rubber latex dilution, followed by stirring for 10-30 min, flocculation, washing and drying to obtain a masterbatch; and(S2) mixing the masterbatch with a synthetic rubber in an internal mixer, and adding a carbon black, a rubber processing oil, zinc oxide, stearic acid, poly(1,2-dihydro-2,2,4-trimethylquinoline) (RD), N-isopropyl-N′-phenyl-p-phenylenediamine (4010NA), vulcanization accelerator, a second wear-resistant filler and a compatibilizer to the internal mixer to obtain a first mixture; subjecting the first mixture and sulphur to mixing by an open mill to obtain a second mixture; and subjecting the second mixture to vulcanization in a vulcanizing machine to obtain the wear-resistant graphene-modified natural rubber.10. The method of claim 9, wherein a solid content of the natural rubber latex is 50-70%; a concentration of the modified graphene oxide in the modified graphene oxide suspension is 0.5-2 mg/mL; and in step (S2), the vulcanization is performed at 140-160° C. for 15-30 min.