Interfacial Properties of Aramid Fiber Composites Reinforced with SiO2-Coated ZnO Nanoparticles

Cuiyu Li,Rui Su,Xiaoyu Li,Linxin Wang 한국섬유공학회 2022 Fibers and polymers Vol.23 No.4

In this study, silica-coated zinc oxide nanoparticles (NPs) were prepared via a sol-gel method using inorganicNPs with an organic polymer binding. A hybrid coating was formed with epoxy resin to form a core-shell structure on thefiber surface to improve the interfacial properties between the fiber and resin. The results showed that there was no decreasein the tensile strength of the fiber and the interfacial shear strength with the epoxy resin increased by 38.26 % compared tothe pristine sample. The addition of a silane coupling agent played an active role in improving the interfacial properties. Infrared spectroscopy and X-ray diffraction analysis revealed that chemical bonds formed between ZnO and SiO2. Scanningelectron microscopy showed that the SiO2-coated ZnO NPs polymer composite formed a uniform film particle layer on thesurface of the aramid fibers. With this method, it is possible to design aramid fiber composites with good interfacialproperties.

조명 방향 변화가 감상자의 시각적 선호도에 미치는 영향 분석

최욱 ( CuiYu ),김종무 ( KimJong-moo ) 커뮤니케이션디자인학회(구 시각디자인학회) 2017 커뮤니케이션 디자인학연구 Vol.61 No.-

감상자의 시각 선호도와 관련된 선행 연구에 따르면, 시각적 선호도는 존재하며 감상자의 주관적이고 심리적인 선택에 영향을 미치는 것으로 나타났다. 이러한 선행 이론을 기초로 본 연구에서 조명의 채광 방향에 따른 감상자의 시각적 선호도가 어떻게 변하는지를 연구 하였다. 실험을 위해 정면, 측면(90도), 45도 그리고 상방(Top) 조명으로 촬영된 3종류 총 12장의 이미지를 선택하고 이를 조명 채광 방향과 관련된 시각적 선호 요소인 매력성, 친밀성, 즐거움, 평가성 및 주목성에 대한 감상자의 선호도를 측정하였다. 이를 위해 중국에 거주하고 있는 총 748명의 실험자를 대상으로 설문을 실시하였으며 설문 결과 첫째, 정면 조명은 매력성, 친밀성, 즐거움 그리고 평가성에서 다른 조명 채광 방향 보다 시각적 선호도가 높았다. 둘째, 주목성의 경우 측면(90도) 조명 방향에서 다른 조명채광 방향 보다 높은 시각적 선호도를 보였다. 이러한 결과로 볼 때, 조명 채광 방향에 따라 감상자의 시각적 선호에 영향을 미치며, 특히 정명 조명 채광 방향은 상대적으로 다른 세 조명 채광 방향 보다 높은 선호도를 보인 것을 알 수 있다. 이번 결과는 조명의 채광 방향에 따른 감상자의 시각적 선호도를 이해하는데 기초 자료가 될 것이라고 사료 된다. According to the research on the audience’s visual preference, it cannot be only verified whether the visual preference exists but also offer a theoretical basis to audience's subjective visual and psychological feelings of audience. In this study, the visual preference of audience is analyzed according to the various directions of light. It is a follow-up study of the audience’s sensitivity preference to the different direction of light. For the purpose of experiment, a total of 12 experimental pictures were taken from four directions, namely front lighting, side lighting(90-degree), 45-degree lighting, and top lighting; and there are 5 kinds of visual preference, they are attractiveness, familiarity, enjoyment, evaluation, and attention. A total of 748 participants were surveyed by questionnaire, and the test was conducted in China. According to the study, first of all, front lighting generated a stronger visual preferences than the other three directions in the terms of attractiveness, familiarity, enjoyment, and evaluation. Secondly, the top lighting, in terms of attention, brought about a higher visual preference than the others. The results above indicated that the lighting direction has an impact on the visual preference of the audience, and in particular, the front lighting generated a relatively stronger visual preference than the other three. The study results can serve as a basic data to understand how the directions of light affect the visual preference of the audience.

Land-plant Phylogenomic and Pomegranate Transcriptomic Analyses Reveal an Evolutionary Scenario of CYP75 Genes Subsequent to Whole Genome Duplications

Taikui Zhang,Cuiyu Liu,Xianbin Huang,Hanyao Zhang,Zhaohe Yuan 한국식물학회 2019 Journal of Plant Biology Vol.62 No.1

Regulatory and developmental genes are retainedfollowing whole-genome duplication (WGD) events, and,thus, are central to elucidating the evolution of the gene familysubsequent to WGDs. Among these genes, the CYP75 genefamily is a key member of the biggest enzyme superfamilyin land-plant lineages. Although the molecular genetics ofthe biological progress involved with CYP75 genes havebeen partly elucidated, the evolution after WGDs in landplantlineages are still largely unknown. Here, we identifiedCYP75 orthologues in pomegranate (Punica granatum) andother twenty-five representative species to explore the geneevolution under WGD shaping on a broad evolutionary scale. Phylogenomic analyses identified genome-wide CYP75candidates and suggested that a recent duplication of theCYP75 genes in seed plants occurred prior to the split ofgymnosperms and angiosperms approximately 400 millionyears ago. Molecular evolution analyses revealed that CYP75gene lineages evolved under a different purifying selectionpressure, and slight relaxations occurred in the recentduplication groups in gymnosperms and angiosperms. Thesyntenic analyses showed that WGDs together with segmentalduplications contributed to the CYP75 gene evolution inpomegranate. RT-PCR, qRT-PCR and RNA-Seq verificationsuggested that pomegranate CYP75 genes evolved throughexon fusion and had a fruit-specific expression pattern. Neo- orsub-functionalization is the main fate of CYP75 genesfollowing duplication. The expression pattern of homologouscopies of CYP75 in pomegranate supports the CYP75 familyevolution contributing to species reproduction that showy fruitcolours attracted birds and other animals to spread seeds. Integration of the above analyses generated a putativeevolutionary scenario of the CYP75 family in land plants. Our data provided a potential reference model to furtherelucidate the evolution of the regulatory and developmentalgene families after WGDs.

The Development Analysis of Leisure Agriculture in Xinxiang City, Henan Province Based on GAHP-SWOT

Jingping Xian,Cuiyue Dong,Lifang Qiao 보안공학연구지원센터 2016 International Journal of Smart Home Vol.10 No.2

Leisure agriculture is an industry which combines the agricultural production and leisure recreation. In order to promote the development of leisure agriculture, it is particularly important to conduct an analysis of its development from the overall perspective of the city. This paper takes Xinxiang City of Henan Province in China as an example and adopts GAHP-SWOT as the analysis method. Based on affirming the influencing factors of advantages, disadvantages, opportunities and threats, the AHP method is adopted to calculate the weights of different factors and sort them so as to realize the organic combination of the qualitative and quantitative analysis. Group Decision is used in computation to exert the collective intelligence. The result shows that the indicators S4 and S3 are relatively high-weight advantages while the indicators W1 and W4 are relatively high-weight disadvantages, and the indicators O4 and O2 are relatively high-weight opportunities while the indicators T5 and T2 are relatively high-weight threats. The development strategy was put forward according to the analysis result in order to provide decision-making basis for the development planning of leisure agriculture in Xinxiang City.

Synthesis and Structure Properties of Flame Retardant and Cationic Dyeable Polyamide 6 Modified with 5-sulfoisophthalic Acid Sodium and Melamine Cyanurate

Yifan Fu,Yun Teng,Guomin Yu,Cuiyu Yin 한국섬유공학회 2018 Fibers and polymers Vol.19 No.7

Unmodified polyamide 6 commonly dyed with acid dyes, and has no flame-retarded properties. So they are flammable and can be easily stained by foods or drinks that contain acid dyes. However, the acid groups react with amino groups that existed at the end of PA6 chain while using cationic dyes. Thus, the acid dyes can be washed immediately. In this study, the flame retardant and cationic dyeable polyamide 6 (FRCD-PA6) modified with 5-sulfoisophthalic acid sodium (5- SSIPA) and melamine cyanurate (MCA) was successfully prepared by the two-step-melt polymerization method. Firstly, cationic dyeable polyamide 6 (CD-PA6) was prepared with sodium salt from 5-sulfoisphthalic acid. Secondly, melamine cyanurate, as an efficient flame retardant, was blended into the reaction. The chemical and crystalline structures of FRCDPA6 were characterized by the Fourier transform infrared spectroscopy (FT-IR) and wide angle X-ray diffraction (XRD). Their thermal properties were tested by differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA), and morphology was analyzed by SEM, respectively. It had been measured to prove the dispersion of 5-SSIPA and MCA on polyamide 6 matrix. Incorporating with 5-SSIPA created more amorphous regions and rose up the dyeing rate easily, with a highest dyeing rate for about 96.79 %. The effect of varying MCA content on the composites showed more flame retardant and made better heat-resistance. Moreover, with the appropriate addition of MCA content, the limit oxygen index (LOI) reached up to 27, less smoking, no more black smoke, droplet phenomenon was slightly, and flame resistance had greatly improved. Because of the good synergy between 5-SSIPA and MCA, a kind of novel modified polyamide 6 which own both cationic dyeable and efficient flame retardant properties was born.

The “Container-Cloud” Architecture and Scene Perception in IoE Era

Bo Yu,Zhongliang Guan,Yan Jiang,Cuiyu Qi,Shifeng Liu 보안공학연구지원센터 2016 International Journal of Grid and Distributed Comp Vol.9 No.5

This paper introduces a new innovative mobile application architecture called "Container-Cloud", which could be probably an inevitable trend in complex cloud, connected devices and network ecosystem in IoE(Internet of Everything) era. The significance of C-C is comparably to Java for web, and android for mobile. There are some innovations in platform operations, in service operations, in developing and in use. The "Container-Cloud" architecture can solve those application silo, enable applications developed, debugged and deployed transparently in cloud, allows mobile applications to be generated on demand, and be migrated and scheduled automatically among cloud, and creates an opportunity for implementation of "context-aware" application in cloud. The paper also gives some "context-aware" application examples based on C-C support in IoE era.

善治视域下中国去南民族工作模式分析

杨文顺(Yang Mingshun),胡翠月(Hu Cuiyue) 동북아시아문화학회 2011 동북아 문화연구 Vol.1 No.27

As a province with the most residential, particular, cross border and autonomous ethnic groups, the largest number of autonomous minority nationality areas, as well as the second largest ethnic group population in China, ethnic work in Yunnan has typicality and representativeness. Under guidance of ethnic theories and policies with Chinese characteristics, ethnic work in Yunnan has explored a success mode fitting its own national and regional practicality. In substance, ethnic work in Yunnan realizes “good governance” in autonomous minority nationality area. In current situation, to summary ethnic work mode in Yunnan Province, it is surely of positive meaning for effective governance in other autonomous minority nationality areas in China. Based on such awareness, from view of political governance theories, on basis of Marxism national theories and policies, taking ethnic work practicei n Yunnan Province as specific cases, this paper aims to a trial explanation for the "good" ethnic work mode in autonomous minority nationality areas.

Formation of MgCO3 3H2O in the CO2 mineralization system using Mg (OH)2 as an intermediate at 20 C

Wenting Cheng,Li Fang,Huaigang Cheng,Enze Li,Cuiyu Zhang,Fangqin Cheng 한국공업화학회 2019 Journal of Industrial and Engineering Chemistry Vol.76 No.-

The formation of MgCO3 3H2O in the CO2 mineralization system was investigated using Mg(OH)2 as anintermediate at 20 C. Liquid and solid analyses were done for qualitative and quantitative compositioncharacterizations of the reacted samples. Results showed that the morphology of Mg(OH)2 had anobvious effect on the growth rate, size and morphology of MgCO3 3H2O. The formation of MgCO3 3H2Omight be explained by the dissolution–recrystallization mechanism. Larger bundle-like MgCO3 3H2Owhich composed of middle-binding rod crystals was obtained from the plate-like Mg(OH)2. Thesefindings could pave the way for controllable crystallization of MgCO3 3H2O in a CO2 mineralizationsystem.