CAJ | 학술논문

将甲乙酮肟（ MEKO）与甲苯二异氰酸酯（ TDI）进行反应，制备了半封闭TDI（ b-TDI）单体，利用该b-TDI单体对氧化石墨（ GO）进行处理，最后用水合肼还原得到表面含封闭NCO基团的功能化石墨烯（bi-G）；将bi-G添加到由聚己二酸丁二醇酯（PBA2000）与异佛尔酮二异氰酸酯（IPDI）等制备的水性聚氨酯（ WPU ）预聚体中，加水分散后得到bi-G／WPU分散液。并采用红外光谱仪（ FT-IR）、X射线衍射仪（ XRD）、透射电镜（ TEM）和热重分析（ TG）对产物进行表征。结果表明，石墨成功地被氧化成氧化石墨烯，并且实现了异氰酸酯的改性，同时也表明，改性后的氧化石墨烯被充分地还原；bi-G被稳定分散到WPU胶束中；bi-G的引入明显改善了聚氨酯材料的热稳定性，特别是经过热处理后，bi-G／WPU复合材料的耐热性进一步提升。
장갑을동우（ MEKO）여갑분이이청산지（ TDI）진행반응，제비료반봉폐TDI（ b-TDI）단체，이용해b-TDI단체대양화석묵（ GO）진행처리，최후용수합정환원득도표면함봉폐NCO기단적공능화석묵희（bi-G）；장bi-G첨가도유취기이산정이순지（PBA2000）여이불이동이이청산지（IPDI）등제비적수성취안지（ WPU ）예취체중，가수분산후득도bi-G／WPU분산액。병채용홍외광보의（ FT-IR）、X사선연사의（ XRD）、투사전경（ TEM）화열중분석（ TG）대산물진행표정。결과표명，석묵성공지피양화성양화석묵희，병차실현료이청산지적개성，동시야표명，개성후적양화석묵희피충분지환원；bi-G피은정분산도WPU효속중；bi-G적인입명현개선료취안지재료적열은정성，특별시경과열처리후，bi-G／WPU복합재료적내열성진일보제승。
The semi-enclosed toluene diisocyanate( b-TDI) was prepaned by the reaction of methyl ethyl ketone oxime( MEKO) and toluene diisocyanate( TDI) ,then,graphene oxide was treated in N,N-dimethyformamide in use of the b-TDI and finally the functionalized graphene( bi-G) whose surface contained blocked isocyanate groups was obtained with hydrazine. Secondly,the above bi-G was added to the polyurethane prepolymer in water to prepare the polyurethane/graphene dispersion,and the polyurethane prepolymer was maked by PBA2000 and IPDI,et al. The X-Ray Diffraction ( XRD ) , the transmission electron microscope ( TEM ) and the thermal gravimetric analyzer ( TG ) were used to characterized the specialities of the composites. The analysis showed that the graphite was successfully oxided to graphene oxide and modified by b-TDI to obtain bi-G after reduction. The bi-G disperation was found dis-persed in the aqueous polyurethane micelles stably. Meanwhile,the TG analysis showed that the composite?s thermal stability had significantly improved, espectionly after heat treatment, the polyuerthane/graphene composite?s heat performance was more prominent.