期刊文献+
共找到7篇文章
< 1 >
每页显示 20 50 100
杂化纳米HNTs-d-RGO/聚乳酸复合材料的制备及热性能 被引量:5
1
作者 贾仕奎 王忠 +3 位作者 朱艳 陈立贵 付蕾 梁文俊 《高分子材料科学与工程》 EI CAS CSCD 北大核心 2019年第5期136-142,共7页
以埃洛石纳米管(HNTs)和氧化石墨烯(GO)为增强填料,聚乳酸(PLA)为基体,利用硅烷偶联剂KH550(APTES)将HNTs与GO杂化获得HNTs-d-RGO纳米粒子,再通过熔融挤出热拉-骤冷工艺制备了一系列纳米HNTs-d-RGO/PLA复合材料。分别采用透射电镜、红... 以埃洛石纳米管(HNTs)和氧化石墨烯(GO)为增强填料,聚乳酸(PLA)为基体,利用硅烷偶联剂KH550(APTES)将HNTs与GO杂化获得HNTs-d-RGO纳米粒子,再通过熔融挤出热拉-骤冷工艺制备了一系列纳米HNTs-d-RGO/PLA复合材料。分别采用透射电镜、红外光谱、扫描电镜、X射线衍射、差示扫描量热分析和维卡软化仪研究了纳米HNTs-d-RGO/PLA复合材料的微观形态、结晶性能与热性能。结果表明,与GO的结晶衍射峰相比,杂化HNTs-d-RGO相应的特征衍射峰强度明显减弱;与纯PLA相比,当HNTs-d-RGO含量达到5%时,其结晶度和耐热变形温度较纯PLA分别提高了19.3%和54.3℃,当HNTs-d-RGO含量达到7%后,纳米HNTs-d-RGO/PLA复合材料团聚现象明显,而相应的结晶度和耐热变形温度出现了一定程度的下降。 展开更多
关键词 埃洛石纳米管 氧化石墨烯 聚乳酸 复合材料 杂化 热性能
下载PDF
紫外老化对聚乳酸结晶及力学性能的影响 被引量:7
2
作者 曹乐 贾仕奎 +3 位作者 张奇锋 王忠 陈立贵 付蕾 《高分子材料科学与工程》 EI CAS CSCD 北大核心 2020年第7期60-66,共7页
采用紫外老化试验仪对聚乳酸(PLA)进行加速老化处理,探究短周期紫外老化后,PLA试样表面与内部不同的老化行为,以及不同老化时间对PLA的结晶及力学性能的影响。结果表明,随老化时间的延长,PLA表面的C=O衍射强度变小,PLA内部C=O的衍射强... 采用紫外老化试验仪对聚乳酸(PLA)进行加速老化处理,探究短周期紫外老化后,PLA试样表面与内部不同的老化行为,以及不同老化时间对PLA的结晶及力学性能的影响。结果表明,随老化时间的延长,PLA表面的C=O衍射强度变小,PLA内部C=O的衍射强度先减小后增大,同时,PLA表面区域的断面形貌比内部更加粗糙,且出现一定的交联现象。经老化处理24 h,48 h,72 h后,PLA表面的结晶度(X_c)依次增大至19.4%,32.7%,35.2%,PLA内部的X_c依次增大至15.0%,27.5%,32.6%;相同老化时间下,PLA表面的X_c总是大于PLA内部的,且随着老化时间的延长,这种趋势逐渐减小。相比于老化前,老化72 h的PLA拉伸强度、冲击强度、弹性模量分别提高了11.49%,38.38%,43.2%。 展开更多
关键词 聚乳酸 紫外老化 交联 结晶 力学性能
下载PDF
聚乳酸的等温结晶调控方法及应用研究进展 被引量:2
3
作者 贾仕奎 闫宗莹 +4 位作者 张向阳 朱艳 赵中国 陈立贵 许磊 《高分子材料科学与工程》 EI CAS CSCD 北大核心 2022年第9期160-166,175,共8页
聚乳酸(PLA)是目前合成生物可降解高分子材料中应用量最大的塑料品种,可望逐渐部分取代石油基聚烯烃而更广泛应用于各个领域。但PLA链的手性结构决定的松弛特性和极低的结晶速率,导致其加工过程中熔体强度低、成型工艺特性不稳定以及挤... 聚乳酸(PLA)是目前合成生物可降解高分子材料中应用量最大的塑料品种,可望逐渐部分取代石油基聚烯烃而更广泛应用于各个领域。但PLA链的手性结构决定的松弛特性和极低的结晶速率,导致其加工过程中熔体强度低、成型工艺特性不稳定以及挤出和注射成型等快速成型加工条件下呈无定形态,从而试样的耐热性、拉伸强度和模量较差。这些问题已成为PLA更大规模商品化和高性能化应用的瓶颈。文中从通过调控PLA及其共混物的等温结晶行为,特别是等温结晶速率和晶体形貌而实现结晶调控出发,综述了近年来国内外利用各类改性剂、链结构、加工流场和后处理对PLA等温结晶行为的调控及其应用方面的研究进展。 展开更多
关键词 聚乳酸 等温结晶 改性剂 链结构 加工流场 后处理
下载PDF
Discussion on Fresh Agricultural Products Ordering and Preservation Strategy under New Normal Carbon Emission Constraint
4
作者 Jianhua Zhao ligui chen Peixiong Zhang 《Plant Diseases and Pests》 CAS 2021年第4期33-36,共4页
The paper mainly discusses the influence of chemical,physical and biological preservation technology improvement on the preservation strategy of fresh agricultural products.Meantime,the relationship between fresh agri... The paper mainly discusses the influence of chemical,physical and biological preservation technology improvement on the preservation strategy of fresh agricultural products.Meantime,the relationship between fresh agricultural products ordering and preservation in the environment of new normal carbon emission constraint is analyzed,and the e-commerce strategy in the digital era is put forward to achieve the win-win situation of consumers,farmers and dealers,so as to achieve good ecological,economic and social benefits. 展开更多
关键词 Carbon emission constraints Fresh agricultural product Ordering and preservation strategy
下载PDF
Control Effect and Application of Solar Intelligent Insect Killer at Vegetable Farms
5
作者 ligui chen Peixiong Zhang Jianyuan Yang 《Plant Diseases and Pests》 CAS 2021年第5期27-30,42,共5页
[Objective]The paper was to study the control effect and application of solar intelligent insect killer on vegetable insects.[Method]The solar intelligent insect killer was installed at vegetable farms in Shenzhen and... [Objective]The paper was to study the control effect and application of solar intelligent insect killer on vegetable insects.[Method]The solar intelligent insect killer was installed at vegetable farms in Shenzhen and other cities.[Result]The insect killer had strong killing effect on many kinds of vegetable insects and sanitary pests,which could kill 27 species of insects,belonging to 17 families,7 orders,and seldom harm the natural enemies.Meantime,it could be used for insect prediction and forecast.[Conclusion]The solar insect killer is featured by deinsectization of many pests,wide range,energy saving and environmental protection,simple operation and low cost,and has obvious ecological,economic,and social benefits in production practice for the vegetable farmer. 展开更多
关键词 Solar intelligent insect killer Vegetable insect Pest control
下载PDF
Analysis on Development Characteristics of Agricultural Product Processing Industry under the New Normal
6
作者 Jianhua Zhao ligui chen Peixiong Zhang 《Plant Diseases and Pests》 CAS 2021年第5期35-38,共4页
From the beginning of the 21^(st)century to 2013,the economic income of main business of agricultural products processing enterprises in China had maintained above double digits for a long time.The current traditional... From the beginning of the 21^(st)century to 2013,the economic income of main business of agricultural products processing enterprises in China had maintained above double digits for a long time.The current traditional high-speed growth will be transformed to high-quality,mediumhigh-speed development,and the development trend is in line with economic laws and macro situation characteristics.With the acceleration of spa-tial distribution and cluster development of agricultural processing industry,the late-mover advantages in the central and western regions of China are gradually emerging.With the support of Internet+and e-commerce online shopping platforms,the integrative development with related industries has been deepened.Led by the new concept of green development,the demand of processing industry of green,healthy,specific functional food(such as diabetes,hypertension and other specific groups)is booming.In the aspect of development strategy,it is appropriate to build multivariate information service platform,improve the technical cooperation platform,and provide software and hardware facilities for further development of agricultural product processing industry.Combined with local economic development advantages,resource advantages and industrial advantages and other factors,the way of differentiation,regionalization and characterization should be taken according to local conditions and following the law,so as to energize the rural revitalization. 展开更多
关键词 Agricultural product Processing industry Development strategy
下载PDF
Analysis on the Factors Influencing Pollution-free Vegetable Production: A Case Study of Shenzhen Huantong Farming Products Co. Ltd.
7
作者 ligui chen Peixiong ZHANG Chuanying LI 《Plant Diseases and Pests》 CAS 2022年第1期38-40,共3页
More than 170 vegetable farmers and vegetable production in 4 vegetable farms of Shenzhen Huantong Farming Products Co.Ltd.were investigated,and the factors affecting the quality of vegetable products were analyzed.Th... More than 170 vegetable farmers and vegetable production in 4 vegetable farms of Shenzhen Huantong Farming Products Co.Ltd.were investigated,and the factors affecting the quality of vegetable products were analyzed.The development strategies of pollution-free vegetables,such as strengthening training of vegetable farmers,reducing vegetable farmers’mobility and vegetable brand building,were put forward. 展开更多
关键词 Pollution-free vegetable Vegetable farmer
下载PDF
上一页 1 下一页 到第
使用帮助 返回顶部