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Hou K, Wang S, Yao X, Yao S, Zhou X, Ma J, Wang P, Feng G. Effect of a Simulated Coal Mine Environment on Polyurethane Grouting Material and a Proposed Polyurethane Strengthening Method. Polymers (Basel) 2023; 15:4449. [PMID: 38006173 PMCID: PMC10674693 DOI: 10.3390/polym15224449] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2023] [Revised: 11/01/2023] [Accepted: 11/03/2023] [Indexed: 11/26/2023] Open
Abstract
When it comes to grouting in coal mines, polyurethane (PU) is often utilized. However, it is of vital importance to consistently improve the mineral PU, considering the significant amount of environmental deterioration to which it is prone. Laboratory experiments were used to model various coal mine conditions. Additionally, a workable technique for PU strengthening using ultrasonic waves was proposed. Compression tests and scanning electron microscopy (SEM) were used to describe the PU-gangue material's induration characteristics. The results showed that ultrasound has a positive impact on PU's mechanical strength. The final strength of the PU was significantly impacted by the size of the coal gangue particles, the amount of dust, and the amount of water. The induration made of gangue and PU with the same mass but differing particle sizes was noticeably different in its compressive strength. The strengthening mechanism showed that the average size of the rigid foam after the ultrasound treatment was smaller, and the 'honeycomb'-structured space in the inner section was more compact, resulting in the rigid PU foam having a higher compressive strength after ultrasound treatment. Furthermore, the dust content and water content of coal mines need to be controlled within a specific range to ensure the effective use of PU grouting materials.
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Affiliation(s)
- Kai Hou
- College of Mining Engineering, Taiyuan University of Technology, Taiyuan 030024, China; (K.H.); (S.W.); (X.Y.); (S.Y.); (P.W.)
- Key Laboratory of Shanxi Province for Mine Rock Strata Control and Disaster Prevention, Taiyuan University of Technology, Taiyuan 030024, China
| | - Shuai Wang
- College of Mining Engineering, Taiyuan University of Technology, Taiyuan 030024, China; (K.H.); (S.W.); (X.Y.); (S.Y.); (P.W.)
| | - Xin Yao
- College of Mining Engineering, Taiyuan University of Technology, Taiyuan 030024, China; (K.H.); (S.W.); (X.Y.); (S.Y.); (P.W.)
| | - Shun Yao
- College of Mining Engineering, Taiyuan University of Technology, Taiyuan 030024, China; (K.H.); (S.W.); (X.Y.); (S.Y.); (P.W.)
| | - Xinxing Zhou
- Key Laboratory of Highway Construction and Maintenance Technology in Loess Region of Ministry of Transport, Shanxi Transportation Technology Research & Development Co., Ltd., Taiyuan 030032, China
| | - Jianchao Ma
- College of Mining Engineering, Taiyuan University of Technology, Taiyuan 030024, China; (K.H.); (S.W.); (X.Y.); (S.Y.); (P.W.)
| | - Pengfei Wang
- College of Mining Engineering, Taiyuan University of Technology, Taiyuan 030024, China; (K.H.); (S.W.); (X.Y.); (S.Y.); (P.W.)
- Key Laboratory of Shanxi Province for Mine Rock Strata Control and Disaster Prevention, Taiyuan University of Technology, Taiyuan 030024, China
| | - Guorui Feng
- College of Mining Engineering, Taiyuan University of Technology, Taiyuan 030024, China; (K.H.); (S.W.); (X.Y.); (S.Y.); (P.W.)
- Key Laboratory of Shanxi Province for Mine Rock Strata Control and Disaster Prevention, Taiyuan University of Technology, Taiyuan 030024, China
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Jiang B, Jiao H, Guo X, Chen G, Guo J, Wu W, Jin Y, Cao G, Liang Z. Lignin-Based Materials for Additive Manufacturing: Chemistry, Processing, Structures, Properties, and Applications. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2023; 10:e2206055. [PMID: 36658694 PMCID: PMC10037990 DOI: 10.1002/advs.202206055] [Citation(s) in RCA: 11] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/19/2022] [Revised: 12/05/2022] [Indexed: 06/17/2023]
Abstract
The utilization of lignin, the most abundant aromatic biomass component, is at the forefront of sustainable engineering, energy, and environment research, where its abundance and low-cost features enable widespread application. Constructing lignin into material parts with controlled and desired macro- and microstructures and properties via additive manufacturing has been recognized as a promising technology and paves the way to the practical application of lignin. Considering the rapid development and significant progress recently achieved in this field, a comprehensive and critical review and outlook on three-dimensional (3D) printing of lignin is highly desirable. This article fulfils this demand with an overview on the structure of lignin and presents the state-of-the-art of 3D printing of pristine lignin and lignin-based composites, and highlights the key challenges. It is attempted to deliver better fundamental understanding of the impacts of morphology, microstructure, physical, chemical, and biological modifications, and composition/hybrids on the rheological behavior of lignin/polymer blends, as well as, on the mechanical, physical, and chemical performance of the 3D printed lignin-based materials. The main points toward future developments involve hybrid manufacturing, in situ polymerization, and surface tension or energy driven molecular segregation are also elaborated and discussed to promote the high-value utilization of lignin.
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Affiliation(s)
- Bo Jiang
- Jiangsu Co‐Innovation Center of Efficient Processing and Utilization of Forest ResourcesInternational Innovation Center for Forest Chemicals and MaterialsNanjing Forestry UniversityNanjing210037China
| | - Huan Jiao
- Jiangsu Co‐Innovation Center of Efficient Processing and Utilization of Forest ResourcesInternational Innovation Center for Forest Chemicals and MaterialsNanjing Forestry UniversityNanjing210037China
| | - Xinyu Guo
- Jiangsu Co‐Innovation Center of Efficient Processing and Utilization of Forest ResourcesInternational Innovation Center for Forest Chemicals and MaterialsNanjing Forestry UniversityNanjing210037China
| | - Gegu Chen
- Beijing Key Laboratory of Lignocellulosic ChemistryBeijing Forestry UniversityBeijing100083China
| | - Jiaqi Guo
- Jiangsu Co‐Innovation Center of Efficient Processing and Utilization of Forest ResourcesInternational Innovation Center for Forest Chemicals and MaterialsNanjing Forestry UniversityNanjing210037China
| | - Wenjuan Wu
- Jiangsu Co‐Innovation Center of Efficient Processing and Utilization of Forest ResourcesInternational Innovation Center for Forest Chemicals and MaterialsNanjing Forestry UniversityNanjing210037China
| | - Yongcan Jin
- Jiangsu Co‐Innovation Center of Efficient Processing and Utilization of Forest ResourcesInternational Innovation Center for Forest Chemicals and MaterialsNanjing Forestry UniversityNanjing210037China
| | - Guozhong Cao
- Department of Materials Science and EngineeringUniversity of WashingtonSeattleWA98195‐2120USA
| | - Zhiqiang Liang
- Institute of Functional Nano & Soft Materials Laboratory (FUNSOM)Jiangsu Key Laboratory for Carbon‐Based Functional Materials & DevicesJoint International Research Laboratory of Carbon‐Based Functional Materials and DevicesSoochow UniversitySuzhou215123China
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Li C, An X, Ren Q, Liu L, Long Y, Zhang H, Yang J, Nie S, Tian Z, Yang G, Cheng Z, Cao H, Liu H. Nanogrinding/ethanol activation facilitating lignin fractionation for preparation of monodispersed lignin nanoparticles. Int J Biol Macromol 2023; 227:608-618. [PMID: 36495988 DOI: 10.1016/j.ijbiomac.2022.12.051] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2022] [Revised: 11/23/2022] [Accepted: 12/06/2022] [Indexed: 12/13/2022]
Abstract
Lignin nanoparticles (LNPs), as one of green and sustainable biological macromolecules, have attracted great attention owing to their promising potentials in many valorized fields. However, the lignin heterogeneity seriously restricts the controllable preparation of LNPs. Herein, a facile nanogrinding activation combining anhydrous ethanol dissolution process was developed to efficiently homogenize lignin prior to gradient ethanol fractionation. Two lignin fractions were obtained from nanogrinding activation/ethanol dissolution followed by gradient ethanol fractionation: L-fractions and S-fractions. Therefore, monodispersed LNPs with unique concave hollow nanostructure and large particle size, and monodispersed LNPs with solid core nanostructure and small particle size were successfully prepared from L-fractions and S-fractions, respectively, via a GVL/water anti-solvent method. The proposed LNPs formation mechanisms facilitated by nanogrinding activation/ethanol dissolution treatment were demonstrated. This study put forwards a facile and green integrated approach for monodispersed LNPs preparation with controllable morphology and particle size.
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Affiliation(s)
- Chenxi Li
- Tianjin Key Laboratory of Pulp and Paper, State Key Laboratory of Biobased Fiber Manufacturing Technology, State Key Laboratory of Biobased Fiber Manufacturing Technology, Tianjin University of Science and Technology, No. 29, 13(th) Street, TEDA, Tianjin 300457, P. R. China
| | - Xingye An
- Tianjin Key Laboratory of Pulp and Paper, State Key Laboratory of Biobased Fiber Manufacturing Technology, State Key Laboratory of Biobased Fiber Manufacturing Technology, Tianjin University of Science and Technology, No. 29, 13(th) Street, TEDA, Tianjin 300457, P. R. China; Department of Chemical Engineering, University of New Brunswick, Fredericton, NB E3B 5A3, Canada.
| | - Qian Ren
- Tianjin Key Laboratory of Pulp and Paper, State Key Laboratory of Biobased Fiber Manufacturing Technology, State Key Laboratory of Biobased Fiber Manufacturing Technology, Tianjin University of Science and Technology, No. 29, 13(th) Street, TEDA, Tianjin 300457, P. R. China
| | - Liqin Liu
- Tianjin Key Laboratory of Pulp and Paper, State Key Laboratory of Biobased Fiber Manufacturing Technology, State Key Laboratory of Biobased Fiber Manufacturing Technology, Tianjin University of Science and Technology, No. 29, 13(th) Street, TEDA, Tianjin 300457, P. R. China; Department of Chemical Engineering, University of New Brunswick, Fredericton, NB E3B 5A3, Canada
| | - Yinying Long
- Tianjin Key Laboratory of Pulp and Paper, State Key Laboratory of Biobased Fiber Manufacturing Technology, State Key Laboratory of Biobased Fiber Manufacturing Technology, Tianjin University of Science and Technology, No. 29, 13(th) Street, TEDA, Tianjin 300457, P. R. China
| | - Hao Zhang
- Tianjin Key Laboratory of Pulp and Paper, State Key Laboratory of Biobased Fiber Manufacturing Technology, State Key Laboratory of Biobased Fiber Manufacturing Technology, Tianjin University of Science and Technology, No. 29, 13(th) Street, TEDA, Tianjin 300457, P. R. China
| | - Jian Yang
- Tianjin Key Laboratory of Pulp and Paper, State Key Laboratory of Biobased Fiber Manufacturing Technology, State Key Laboratory of Biobased Fiber Manufacturing Technology, Tianjin University of Science and Technology, No. 29, 13(th) Street, TEDA, Tianjin 300457, P. R. China
| | - Shuangxi Nie
- Guangxi Key Laboratory of Clean Pulp & Papermaking and Pollution Control, College of Light Industry and Food Engineering, Guangxi University, Nanning 530004, PR China
| | - Zhongjian Tian
- State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology, Shandong Academy of Sciences, Jinan 250353, PR China
| | - Guihua Yang
- State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology, Shandong Academy of Sciences, Jinan 250353, PR China
| | - Zhengbai Cheng
- Zhejiang Jing Xing Paper Joint Stock Co., Ltd., No. 1, Jing Xing Industry Zone, Jing Xing First Road, Caoqiao Street, Pinghu, Zhejiang Province 314214, PR China
| | - Haibing Cao
- Zhejiang Jing Xing Paper Joint Stock Co., Ltd., No. 1, Jing Xing Industry Zone, Jing Xing First Road, Caoqiao Street, Pinghu, Zhejiang Province 314214, PR China
| | - Hongbin Liu
- Tianjin Key Laboratory of Pulp and Paper, State Key Laboratory of Biobased Fiber Manufacturing Technology, State Key Laboratory of Biobased Fiber Manufacturing Technology, Tianjin University of Science and Technology, No. 29, 13(th) Street, TEDA, Tianjin 300457, P. R. China.
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Fabrication Mechanisms of Lignin Nanoparticles and Their Ultraviolet Protection Ability in PVA Composite Film. Polymers (Basel) 2022; 14:polym14194196. [PMID: 36236143 PMCID: PMC9572465 DOI: 10.3390/polym14194196] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2022] [Revised: 09/30/2022] [Accepted: 10/04/2022] [Indexed: 12/03/2022] Open
Abstract
Lignin is an indispensable and essential compound present in plants. It is a renewable resource and a green alternative to traditional petroleum energy. The rational utilization of lignin can reduce the environmental damage caused by traditional industrial development. The preparation of lignin nanoparticles (LNPs) using the self-assembly method is one of the most favorable ways to achieve high value-added utilization of lignin. However, the process requires an in-depth understanding of the sphere-forming mechanism of lignin self-assembly and the interaction of self-assembly forces. We used the same raw materials and two different preparation methods to prepare LNPs. The results revealed that the variation in the order of the dropwise addition of lignin solution and deionized water produced LNPs with varying average sizes. The sphere-forming mechanisms of the two kinds of lignin nanoparticles were discussed for the preparation of UV-resistant polyvinyl alcohol (PVA) polymeric films. During lignin spherification, the faster the solution reaches the supersaturation state, the faster the spherogenesis rate is, the smaller the size is, and the narrower the particle size distribution is. The lignin micro/nanospheres are produced by exploiting the π-π bonding interactions in lignin itself. The lignin micro/nanospheres are then mixed with PVA to form a film to obtain a lignin-PVA composite film material with an anti-UV effect.
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Dorieh A, Ayrilmis N, Farajollah Pour M, Ghafari Movahed S, Valizadeh Kiamahalleh M, Shahavi MH, Hatefnia H, Mehdinia M. Phenol formaldehyde resin modified by cellulose and lignin nanomaterials: Review and recent progress. Int J Biol Macromol 2022; 222:1888-1907. [DOI: 10.1016/j.ijbiomac.2022.09.279] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2022] [Revised: 09/06/2022] [Accepted: 09/28/2022] [Indexed: 11/05/2022]
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Jiang Q, Li P, Liu Y, Zhu P. Phytic Acid-Iron/Laponite Coatings for Enhanced Flame Retardancy, Antidripping and Mechanical Properties of Flexible Polyurethane Foam. Int J Mol Sci 2022; 23:ijms23169145. [PMID: 36012407 PMCID: PMC9408875 DOI: 10.3390/ijms23169145] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2022] [Revised: 08/10/2022] [Accepted: 08/11/2022] [Indexed: 11/16/2022] Open
Abstract
The use of flexible polyurethane foam (FPUF) is severely limited due to its flammability and dripping, which can easily cause major fire hazards. Therefore, choosing an appropriate flame retardant to solve this problem is an urgent need. A coating was prepared on the FPUF surface by dipping with phytic acid (PA), Fe2(SO4)3·xH2O, and laponite (LAP). The influence of PA-Fe/LAP coating on FPUF flame-retardant performance was explored by thermal stability, flame retardancy, combustion behavior, and smoke density analysis. FPUF/PA-Fe/LAP has a good performance in the small fire test, which can pass the UL-94 V-0 rating and the limiting oxygen index reaches 24.5%. Meanwhile, the peak heat release rate values and maximum smoke density of FPUF/PA-Fe/LAP are reduced by 38.7% and 38.5% compared with those of neat FPUF. After applying PA-Fe/LAP coating, the value of fire growth rate index decreases from 10.5 kW/(m2·s) to 5.1 kW/(m2·s), dramatically reducing the fire risk. Encouragingly, the effect of PA-Fe/LAP coating on cyclic compression and permanent deformation is small, which is close to that of neat FPUF. This work provides an effective strategy for making a flame-retardant FPUF with antidripping and keeping mechanical properties.
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