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您的检索式：作者名="Chengde Yu"
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| 1 | Achieving higher performances without an external curing agent in natural magnolol-based epoxy resin显示文摘Bio-based epoxy thermoset prepared from renewable biomass raw materials can alleviate fossil energy crisis and reduce environmental pollution,which satisfies the needs of sustainable social development.In this study,a bio-based epoxy thermoset precursor(MGOL-EP) was synthesized from a naturally occurring magnolol through a facile and efficient one-step process.And the fully bio-based epoxy thermoset(MGOL-EP-SC) was obtained by self-curing without adding any other hardener.MGOL-EP-SC revealed an extremely high glass-transition temperature(T_(g)) of 265℃ and char yield of 53.2%(in N;),which were at the highest level among the fully bio-based epoxy thermosets reported so far.In addition,when the MGOL-EP was cured with 4,4’-methylenedianiline(DDM),T_(g)of the MGOL-EP/DDM was decreased by 61℃ and the other comprehensive performance had also been decreased,which was due to a reduction in biphenyl structure content and cross-linking density by adding the external curing agents.Moreover,the MGOL-EP-SC presented certain killing rate(48.4%) to Staphylococcus aureus.These findings provide a new design strategy for engineering high-performance and functional epoxy thermoset with high biomass content. | Qi Cao Zhihuan Weng Yu Qi Jiahui Li Wentao Liu Chengde Liu Shouhai Zhang Zhiyong Wei Yousi Chen Xigao Jian | 2022 | Chinese Chemical Letters2022，33，4： | 2 |
| 2 | Holocene Megathermal Abrupt Environmental Changes Derived from 14C Dating of a Coral Reef at Leizhou Peninsula, South China Sea显示文摘 | Shen Chengde Yi Weixi Yu Kefu | 2004 | Nucl Instr and Meth2004，，： | 1 |
| 3 | Cascade signal amplification for DNA detection 显示文摘 | TIAN Ye HE Yu MAO Chengde | 2006 | Chembiochem2006，7，： | 1 |
| 4 | An ignored key link in greenhouse effect:Soil and soil CO_(2) slow heat loss显示文摘The ever-increasing atmospheric CO_(2) concentration is a key driver of modern global warming.However,the low heat capacity of atmosphere and strong convection processes in the troposphere both limit heat retention.Given the higher heat capacity and CO_(2) concentration in soil compared to the atmosphere,the direct contributions of soil to the greenhouse effect may be significant.By experimentally manipulating CO_(2) concentrations both in the soil and the atmosphere,we demonstrated that the soil-retained heat and the slower soil heat transmission decrease the amount of heat energy leaking from the earth.Furthermore,the soil air temperature was affected by soil CO_(2) concentration,with the highest value recorded at 7500 ppm CO_(2).This study indicates that soil and soil CO_(2),together with atmospheric CO_(2),play a crucial role in the greenhouse effect.The spatial and temporal heterogeneity of soils and soil CO_(2) should be further investigated,given their potentially significant influence on global climate change. | Weixin Zhang Chengde Yu Zhifeng Shen Shu Liu Suli Li Yuanhu Shao Shenglei Fu | 2020 | Soil Ecology Letters2020，2，4： | 0 |
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