Article
Agricultural Engineering
Yuanbin Lai, Yong Qian, Dongjie Yang, Xueqing Qiu, Mingsong Zhou
Summary: In this study, industrial Alkali Lignin was used as a hydrophilic chain extender to prepare lignin-based waterborne polyurethane emulsions with different lignin contents. The introduction of AL improved the thermal stability and UV aging resistance of the polyurethane material, while also enhancing the mechanical properties of the film. The study demonstrates the potential of lignin-based waterborne polyurethane emulsions as a new type of bio-based polyurethane material.
INDUSTRIAL CROPS AND PRODUCTS
(2021)
Review
Polymer Science
Xiaozhen Ma, Jing Chen, Jin Zhu, Ning Yan
Summary: Lignin has been explored as a raw material for polyurethane synthesis due to its abundance, renewable nature, and surface hydroxyl groups. It offers superior product performance without competing with food supply. Challenges such as product isolation, heterogeneity, aggregation, steric hindrance, and low activity hinder its full utilization in polyurethane production.
MACROMOLECULAR RAPID COMMUNICATIONS
(2021)
Article
Polymer Science
Yuan Lei, Bo Wu, Anqian Yuan, Jingxin Lei, Liang Jiang
Summary: A novel class of waterborne polyurethanes (WPUs) were synthesized in this work, demonstrating self-healing and photoluminescent properties after incorporating carbon quantum dots (CQs). The prepared WPUs showed excellent mechanical performance with uniform size distribution and self-healing efficiency. Additionally, the WPUs with CQs emitted bright orange fluorescence under ultraviolet light, showing outstanding photoluminescence properties and environmental friendliness.
JOURNAL OF APPLIED POLYMER SCIENCE
(2021)
Article
Polymer Science
Sariah Saalah, Luqman Chuah Abdullah, Min Min Aung, Mek Zah Salleh, Dayang Radiah Awang Biak, Mahiran Basri, Emiliana Rose Jusoh, Suhaini Mamat, Syeed SaifulAzry Osman Al Edrus
Summary: This study prepared a waterborne polyurethane dispersion using jatropha oil, achieving successful production of free standing films with high bio-based content. Adjusting the OH number of the polyol significantly increased the crosslinking density of the material, leading to improved storage modulus and hydrophobicity.
Article
Engineering, Environmental
Qi Yuan Ng, Jiun Hor Low, Ming Meng Pang, Christopher Igwe Idumah
Summary: A comparative study was conducted to investigate the use of unfunctionalized lignin and functionalized lignin as reinforcing fillers for waterborne polyurethane film. The results showed that the functionalized lignin significantly improved the tensile properties and thermal stability of the film compared to the unfunctionalized lignin. The addition of functionalized lignin increased the ultimate tensile strength by 9% and made the film more flexible with higher deformation resistance. The thermal stability of the bio-composite films was not compromised by the addition of functionalized lignin.
JOURNAL OF POLYMERS AND THE ENVIRONMENT
(2023)
Article
Construction & Building Technology
Lanxin Wang, Jiawen Zhang, Fengjuan Wang, Zhiyong Liu, Wei Su, Zhaoyi Chen, Jinyang Jiang
Summary: By adding polyaniline/lignin (PL) to WPU coatings, the mechanical property and water contact angle of the coatings have been improved. The impermeability and chloride migration coefficient of cement-based materials have also been enhanced, demonstrating the potential of PL as an effective additive for WPU coatings in protecting cement-based materials.
JOURNAL OF BUILDING ENGINEERING
(2023)
Article
Chemistry, Applied
Zixuan Rao, Hongye Yan, Wangwang Tao, Chang Liu, Guodong Jian, Yu Zhou, Hongxiang Chen, Minghua Yang
Summary: By introducing APT-PDMS modification, phase separation between hard segment and soft segment can be achieved in the WPU film, while improving the water resistance of the film. However, a high APT-PDMS/HEA molar ratio will limit the mechanical properties and water resistance of the film.
PROGRESS IN ORGANIC COATINGS
(2023)
Article
Chemistry, Multidisciplinary
Yuan Yao, Bo Liu, Ziyang Xu, Jianhai Yang, Wenguang Liu
Summary: The study developed an eco-friendly self-healable waterborne polyurethane elastomer with ultra-high tensile strength, super toughness, and unprecedented fracture energy, demonstrating robust self-healing properties at 50 degrees Celsius.
MATERIALS HORIZONS
(2021)
Article
Materials Science, Multidisciplinary
Mengyun Zhang, Rimin Cong, Yunjun Luo
Summary: This article presents a simple and efficient method to encapsulate reactive mercaptans using waterborne polyurethane (WPU) prepolymers. The encapsulated mercaptans are successfully incorporated into microcapsules, which are then embedded in a self-healing epoxy waterborne polyurethane (EWPU) matrix. The self-healing efficiency of the EWPU is nearly 100%, making it a promising material for industrial applications.
MATERIALS ADVANCES
(2022)
Article
Forestry
Wen-Jau Lee, Ming-Shan Hu, Chao-Yun Yu, Yi-Chun Chen
Summary: Adding LL to polyurethane resins can increase the stiffness of the film but decreases breaking deformation; films prepared with EDA as the chain extender have better heat-resistance compared to those with 1,4-BD.
Article
Polymer Science
Bo Min Kim, Jin Sil Choi, Sunjin Jang, Hyeji Park, Seung Yeol Lee, Joonhoo Jung, Jaehyeung Park
Summary: This study introduces a novel approach for synthesizing lignin-incorporated castor-oil-based cationic waterborne polyurethane with improved properties. The inclusion of lignin contributes to enhanced mechanical properties, thermal stability, and solvent resistance. This material also exhibits desirable characteristics such as UV protection and antibacterial properties.
Article
Biochemistry & Molecular Biology
Xinxiang Li, Mengfan Yang, Wan Zhang, Kunlin Chen, Chaoxia Wang
Summary: The reversible acid-induced discoloration azobenzene UV-curable lignin-based waterborne polyurethane polymeric dye (EDA-ULPD) is prepared through chemical modification to improve stability and color fastness. The dye exhibits pH-responsive color changes from yellow to pink, showing potential for applications in smart textiles.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2021)
Article
Agricultural Engineering
Nan Sun, Zhaofeng Wang, Xi Ma, Kaixin Zhang, Zeyu Wang, Zhenyu Guo, Yun Chen, Lihao Sun, Wang Lu, Yang Liu, Mingwei Di
Summary: A facile strategy to prepare lignin-containing polyurethane elastomers based on hydrogen and disulfide bonds with good self-healing properties and tensile strength is reported. The study explores the role of lignin and the introduction order of disulfide bonds on the properties of polyurethane elastomers, and elaborates on the self-healing mechanism of dynamic hydrogen and disulfide bonds.
INDUSTRIAL CROPS AND PRODUCTS
(2021)
Article
Engineering, Environmental
Rulin Shen, Mingjun Long, Chendong Lei, Liming Dong, Guipeng Yu, Juntao Tang
Summary: In this study, the mechanical properties of vegetable oil-based waterborne polyurethane (WPUs) were improved by incorporating sustainable diols. The resulting films demonstrated higher tensile strength and toughness compared to state-of-the-art systems. Among the different diols investigated, WPU-B films exhibited superior performance and increased corrosion resistance. This research provides strategies for controlling the physical properties of environmentally friendly WPUs and developing high-performance coatings for anticorrosion applications.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Polymer Science
Shu-Yi Chen, Ren-Quan Zhuang, Fu-Sheng Chuang, Syang-Peng Rwei
Summary: By using ether diol and traditional hydrophilic chain-extender, the abrasion resistance of WPU can be increased, with micro-phase separation having a significant impact on abrasion properties. The use of ether-based diol can enhance the toughness and abrasion resistance of WPU.
JOURNAL OF APPLIED POLYMER SCIENCE
(2021)
Article
Engineering, Chemical
Yanchao Zhu, Bing Di, Hongzhuo Chen, Xiaofeng Wang, Yumei Tian
JOURNAL OF ADHESION SCIENCE AND TECHNOLOGY
(2019)
Article
Polymer Science
Ruiqi Wang, Bing Zhou, Yanchao Zhu, Zichen Wang
INTERNATIONAL JOURNAL OF POLYMER SCIENCE
(2019)
Article
Polymer Science
Miaomiao Qian, Weimin Huang, Jinfeng Wang, Xiaofeng Wang, Weiping Liu, Yanchao Zhu
Article
Materials Science, Textiles
Bin Tang, Xi Lu, Jinfeng Wang, Hao Yu, Yanchao Zhu, Steven E. Atkinson, Xungai Wang
Summary: The gas adsorption properties of key natural fibers, wool and cotton, were investigated through time-resolved infrared spectroscopy monitoring the adsorption process of ammonia. The Langmuir isotherm model best described the adsorption process, with monolayer adsorption onto the fibers. The study also found differences in adsorption capacity and activation energy values between wool and cotton.
JOURNAL OF THE TEXTILE INSTITUTE
(2021)
Article
Polymer Science
Miaomiao Qian, Bo Zou, Zhixiao Chen, Weimin Huang, Xiaofeng Wang, Bin Tang, Qingtao Liu, Yanchao Zhu
Summary: The Mullins effect in filled elastomers is significantly impacted by the crosslinking degree of the matrix and the size of the filler. Adjusting the crosslinking degree of the matrix and controlling the particle size of the filler systematically influences the dissipation ratios of different elastomer composites, revealing a characteristic dependence on the composite composition.
Article
Chemistry, Physical
Yafei Shi, Miaomiao Qian, Xinru Wang, Wanjia Zhang, Xuewei Zhang, Xiaofeng Wang, Yanchao Zhu
Summary: Rice husk ash (RHA)-reinforced composites are widely used in tribological applications. This study investigated two types of RHAs treated with different methods. It was found that RHA pretreated with hydrochloric acid had smaller particle size and more uniform dispersion. The results showed that composites with acid-treated RHA significantly reduced the friction coefficient.
