Article
Forestry
Dengkang Guo, Sheng Yang, Feng Fu, Nai Guo, Gaiyun Li, Fuxiang Chu
Summary: A novel method based on the in situ reaction of a hydrophilic epoxy monomer in wood cell walls was proposed to improve the performance of fast-growing plantation wood. The modified wood showed notable improvements in dimensional stability, fungal decay resistance, and compressive strength.
WOOD SCIENCE AND TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Shaolong Huang, Fan Jin, Dongdong Chen, Qiang Xiao, Qingjun Ding
Summary: This study examines the mechanical performance, deformability properties and rheological properties of a newly developed waterborne epoxy resin (WER)-modified emulsified asphalt (WE/A) binder for micro-surfacing. Two types of WER, semi-flexible and rigid, were used to modify the binder. The study investigates the modification mechanism using fluorescent microscope test and scanning electron microscope (SEM). Furthermore, the pavement performance at micro-surfacing was assessed through various tests.
Article
Biochemistry & Molecular Biology
Yunyi Liang, Yonghong Luo, Yang Wang, Tianyang Fei, Lili Dai, Daihui Zhang, Hongzhi Ma, Liping Cai, Changlei Xia
Summary: Soy protein isolate (SPI) is a natural material used in wood adhesives, but its mechanical properties and water resistance are poor. By combining lysine (Lys) with a modified soy-based wood adhesive, the mechanical strength and interfacial bonding ability of soy protein-based composites can be improved. Adding Lys and glycerol epoxy resin (GER) further enhances the wet shear strength and water resistance of the adhesive. This research provides a new strategy for developing low-cost, renewable biobased adhesives with excellent mechanical properties, which can be a promising alternative to formaldehyde-free adhesives in the wood industry.
Article
Construction & Building Technology
Xianglan Huang, Shu Wang, Yiqiang Wu, Jian Wang, Yingfeng Zuo
Summary: Waterborne epoxy resin/magnesium oxychloride composites demonstrated lower viscosity, higher compressive strength, and water resistance, attributed to chemical reactions forming a crosslinked network structure between WER and MOC. XRD analysis showed changes in phase composition with WER addition, without new crystal phases emerging.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Polymer Science
Hongdeok Kim, Joonmyung Choi
Summary: The origin of the mechanical properties of highly cross-linked epoxy networks was investigated theoretically from a subcontinuum perspective. A blending model was established to predict the mechanical properties based on molecular dynamics simulations and chemical bonding quantification.
Article
Polymer Science
Yuanyuan Zhou, Yan Liu, Binjie Xin, Ying Qin, Guankun Kuang
Summary: In this study, waterborne polyurethane (WPU) was modified by cross-linking using polycarbonate diols (PCDL) as soft segments and Trimethylolpropane (TMP) as a crosslinker, resulting in the synthesis of polycarbonate type waterborne polyurethane (WPCU). The crosslinked WPCU film exhibited lower water absorption, higher water contact angle, excellent tensile strength, and better water and alcohol resistance compared to the uncrosslinked WPCU film. SEM analysis further examined the effect of crosslinker content on the microphase separation and surface roughness of the film.
Article
Construction & Building Technology
Xiaoguang Yao, Lingzhi Tan, Tao Xu
Summary: The addition of waterborne epoxy resin and styrene butadiene rubber latex can improve the performance of emulsified asphalt, but the dosage of both materials needs to be carefully controlled to balance their effects on EA performance.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Chemistry, Applied
Yiheng Xiao, Wei Ou, Zonglin He, Zhu Ding, Jiaoyan Ai, Lina Song, Baohua Liu
Summary: In this study, a series of modified waterborne polyurethane (WPU) with varying epoxy contents were synthesized and their particle size, stability, freeze-thaw resistance, film hardness, adhesion level, structural characteristics, thermal stability, and corrosion resistance were examined.
JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH
(2023)
Article
Construction & Building Technology
Lihong He, Yitong Hou, Fan Yang
Summary: This paper investigated the comprehensive properties, microstructure, modification mechanism, and strength formation mechanism of waterborne epoxy resin emulsified asphalt (WEREA). Test results showed that with the increase of WER content, the adhesive properties and creep recovery properties at high temperature of WEREA gradually improved, and it met heavy traffic demand when the WER content was 15%.
JOURNAL OF MATERIALS IN CIVIL ENGINEERING
(2023)
Article
Forestry
Zhenyu Sun, Jianxiong Lv, Zhangheng Wang, Yiqiang Wu, Guangming Yuan, Yingfeng Zuo
Summary: The study found that using environmentally friendly modifiers and multi-step impregnation method to modify Chinese fir can improve its mechanical properties and water resistance, laying the foundation for its use as a high-performance wooden material.
WOOD SCIENCE AND TECHNOLOGY
(2021)
Article
Nanoscience & Nanotechnology
Gongwen Tang, Xiangyu Hou, Yi Wang, Zhishan Yan, Tingting Ren, Linrong Ma, Xin Huang, Chengpeng Wang
Summary: h-BN/PANI nanocomposites were prepared and used to enhance the anticorrosion performance of waterborne epoxy coatings. The coating with 2 wt % h-BN/PANI nanocomposites showed significantly improved anticorrosion performance, attributed to the synergistic effect of well-dispersed nanocomposites and PANI as the corrosion inhibitor.
ACS APPLIED NANO MATERIALS
(2022)
Article
Chemistry, Inorganic & Nuclear
Andrea Cingolani, Valerio Zanotti, Cristiana Cesari, Martina Ferri, Laura Mazzocchetti, Tiziana Benelli, Stefano Merighi, Loris Giorgini, Rita Mazzoni
Summary: The synthesis of bis-amino functionalized N-heterocyclic carbene cyclopentadienone iron complexes for iron containing epoxy resins is reported. These complexes are effective in producing high Tg thermosets with low hardener content, and also display impressive charring ability for improved flame behavior in materials.
INORGANICA CHIMICA ACTA
(2021)
Article
Forestry
Dengkang Guo, Sheng Yang, Feng Fu, Gaiyun Li, Fuxiang Chu
Summary: A suitable polymer formation process is crucial for the design of new wood modification systems. This study elucidates the shrinking and cracking phenomenon of modified wood caused by the shrinkage of gel polymer formed during the polymerization process in wood, emphasizing the importance of separating polymers and solvents during the first stage of wood cell wall polymerization modification.
WOOD SCIENCE AND TECHNOLOGY
(2022)
Article
Construction & Building Technology
Yang Li, Xinyi Yang, Bin Lu
Summary: The objective of this paper is to study the impact of DMP-30 on the curing rate and mechanical properties of WEREA. WEREA/DMP-30 composites were prepared and their high temperature rheological properties, low temperature rheological properties, adhesion properties, tensile properties, and fluorescence microscopy images were investigated. The results showed that DMP-30 can effectively reduce the curing time of WEREA. However, it has both positive and negative effects on the mechanical properties, with 1% and 2% DMP-30 dosing enhancing high temperature performance and tensile strength, while 3% DMP-30 dosing weakening them. Additionally, DMP-30 improves the ductility and flexibility of WEREA. These findings provide guidance for material optimization design of waterborne epoxy resin modified emulsified asphalt.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2023)
Article
Polymer Science
Xiaoxing Yan, Wenting Zhao, Lin Wang
Summary: By simultaneously adding fluorane thermochromic microcapsules and waterborne acrylic resin microcapsules, an intelligent waterborne coating film with dual functions of color change and self-repairing was successfully prepared. The coating film prepared by adding 15.0% fluorane microcapsules and 5.0% waterborne acrylic resin microcapsules to the primer showed better comprehensive properties.
