1
|
Ji E, Zhou H, Xu G, Wang X, Wang L, Gao J, Yan J. Insights into heterogeneous surface induced bubble nucleation mechanisms in cellulose reinforced polylactic acid foams. Int J Biol Macromol 2024; 268:131659. [PMID: 38641275 DOI: 10.1016/j.ijbiomac.2024.131659] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2024] [Revised: 04/03/2024] [Accepted: 04/15/2024] [Indexed: 04/21/2024]
Abstract
As the most abundant natural homo-polymer, cellulose has the potential to enhance polymer properties reducing the cost of raw materials. In this work, the carboxylate cellulose nanofiber (CNF-C) was selected to modify polylactic acid (PLA) foams, and the density functional theory was constructed to help analyze the foaming mechanism quantitatively. The theoretical results showed that the ordered structure, the carboxyl and the hydroxyl of CNF-C were more conducive to providing much stronger CO2 adsorption for bubble nucleation, where the predicted critical bubble size decreased and the cell density increased with the addition of CNF-C. The experimental results revealed that the CNF-C promoted the rheological properties and crystallization behaviors of PLA samples, the PLA/CNF-C foams were characterized with uniform structures, the average cell size decreased from 21.39 μm to 0.19 μm, and the cell number density increased from 2.65×1010cell/cm3 to 2.30×1014cell/cm3. Those improvements resulted in an increase of 394.0 % for the compressive strength of the prepared foams. Generally, the high-performance PLA/CNF-C foams were fabricated successfully without compromising the properties of bio-based and biodegradable, the foaming mechanism was analyzed combining theoretical results with experimental data, and it was believed to provide a guide for cellulose reinforcing biodegradable polymer materials.
Collapse
Affiliation(s)
- Enle Ji
- College of Science & Technology, Hebei Agricultural University, Huanghua, Hebei 061100, People's Republic of China
| | - Hongfu Zhou
- Key Laboratory of Processing and Application of Polymeric Foams of China National Light Industry Council, School of Light Industry Science and Engineering, Beijing Technology and Business University, Beijing 100048, People's Republic of China.
| | - Guohe Xu
- College of Science & Technology, Hebei Agricultural University, Huanghua, Hebei 061100, People's Republic of China
| | - Xiangdong Wang
- Key Laboratory of Processing and Application of Polymeric Foams of China National Light Industry Council, School of Light Industry Science and Engineering, Beijing Technology and Business University, Beijing 100048, People's Republic of China
| | - Linyan Wang
- College of Science & Technology, Hebei Agricultural University, Huanghua, Hebei 061100, People's Republic of China.
| | - Jianping Gao
- College of Science & Technology, Hebei Agricultural University, Huanghua, Hebei 061100, People's Republic of China
| | - Jundian Yan
- College of Science & Technology, Hebei Agricultural University, Huanghua, Hebei 061100, People's Republic of China
| |
Collapse
|
2
|
Yang H, Xu G, Li J, Wang L, Yu K, Yan J, Zhang S, Zhou H. Fabrication of bio-based biodegradable poly(lactic acid) (PLA) and poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) composite foams for highly efficient oil-water separation. Int J Biol Macromol 2024; 257:128750. [PMID: 38101682 DOI: 10.1016/j.ijbiomac.2023.128750] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2023] [Revised: 11/27/2023] [Accepted: 12/09/2023] [Indexed: 12/17/2023]
Abstract
The open-cell bio-based biodegradable polymer foams show good application prospect in dealing with the serious environmental issue caused by oil spill and organic solvents spills, while the cell structures and hydrophobic properties of the foams limit their performance. In this work, the poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) was selected to help prepare bio-based biodegradable poly(lactic acid) (PLA) foams. Based on a two-step foaming method, the crystallization ability of different samples was regulated by the "original crystals" together with PHBV in the foaming process, where skeleton structures were provided to facilitate the open-cell structures and promote their mechanical property. As illustrated, PHBV facilitated the formation of open-cell PLA foams, where the foams displayed superior oil-water separation capacity. The maximum volume expansion ratio of the foams was 80.08, the contact angle of deionized water reached to 134.5°, the adsorption capacity for oil or organic solvents was 10.8 g/g-51.8 g/g, and the adsorption capacity for CCl4 can still maintained 83.5 % of the initial value after 10 adsorption-desorption cycles. This work not only clarified the foaming mechanism of open-cell foams, but also provided a green and simple method for preparing bio-based biodegradable foams possessing excellent oil-water separation performance.
Collapse
Affiliation(s)
- Hailong Yang
- College of Science & Technology, Hebei Agricultural University, Huanghua, Hebei 061100, People's Republic of China
| | - Guohe Xu
- College of Science & Technology, Hebei Agricultural University, Huanghua, Hebei 061100, People's Republic of China
| | - Jiantong Li
- College of Science & Technology, Hebei Agricultural University, Huanghua, Hebei 061100, People's Republic of China
| | - Linyan Wang
- College of Science & Technology, Hebei Agricultural University, Huanghua, Hebei 061100, People's Republic of China.
| | - Kesong Yu
- School of Materials Science & Engineering, Zhengzhou University, Zhengzhou 450002, People's Republic of China
| | - Jundian Yan
- College of Science & Technology, Hebei Agricultural University, Huanghua, Hebei 061100, People's Republic of China
| | - Shuo Zhang
- College of Science & Technology, Hebei Agricultural University, Huanghua, Hebei 061100, People's Republic of China
| | - Hongfu Zhou
- Key Laboratory of Processing and Application of Polymeric Foams of China National Light Industry Council, College of Chemistry and Materials Engineering, Beijing Technology and Business University, Beijing 100048, People's Republic of China.
| |
Collapse
|
3
|
Shi Z, Liu X, Zhou Y, Cong H. Study of graphene oxide complexed hemicucurbit[6]uril on polypropylene composites: Crystallization behavior, foaming performance, and mechanical properties. POLYM ADVAN TECHNOL 2022. [DOI: 10.1002/pat.5704] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Zhiliang Shi
- The Institute of Chemistry and Chemical Industry Guizhou University Guiyang China
| | - Xiaoke Liu
- The Institute of Chemistry and Chemical Industry Guizhou University Guiyang China
| | - Yuhui Zhou
- The Institute of Chemistry and Chemical Industry Guizhou University Guiyang China
| | - Hang Cong
- The Institute of Chemistry and Chemical Industry Guizhou University Guiyang China
| |
Collapse
|
4
|
Zhang C, Wan L, Gu H, Hu Q, Ding Y, Ying S. Preparation and properties of foamed cellulose acetate/polylactic acid blends. POLYM ENG SCI 2021. [DOI: 10.1002/pen.25819] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Chenghao Zhang
- School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology Nanjing China
| | - Lei Wan
- School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology Nanjing China
| | - Han Gu
- School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology Nanjing China
| | - Qipeng Hu
- School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology Nanjing China
| | - Yajun Ding
- School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology Nanjing China
- Key Laboratory of Special Energy Materials (Nanjing University of Science and Technology), Ministry of Education Nanjing China
| | - Sanjiu Ying
- School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology Nanjing China
- Key Laboratory of Special Energy Materials (Nanjing University of Science and Technology), Ministry of Education Nanjing China
| |
Collapse
|
5
|
Wu Y, Zhou X, Li J, Yu K, Wang L, Ma J. Mechanism of Heterogeneous Bubble Nucleation in Polymer Blend Foaming. J Phys Chem B 2021; 125:6709-6716. [PMID: 34121408 DOI: 10.1021/acs.jpcb.1c03087] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A three-dimensional heterogeneous bubble nucleation model is constructed to provide a reasonable explanation at the molecular level for the foaming mechanism of polypropylene (PP) and polystyrene (PS) blends. CO2 solubilities and supersaturation rations are quantitatively calculated to help interpret the contribution of each phase of the blend in the CO2 dissolution stage. The spatial density profiles of polymer/CO2 binary melt around different polymer chains are presented to give an intuitive perspective to the thermodynamic driving force. The predicted interfacial tension and contact angles of critical bubbles provide valid evidence to distinguish the wettability of CO2 in different regions. The values of predicted free-energy barriers, critical radii, and nucleation number densities imply that bubbles that nucleate in the PP and PS blend interfacial region attached to the PS-rich phase achieve the smallest size and largest number density. The reliability of the theoretical model has been tested by partial available experimental data.
Collapse
Affiliation(s)
- Ying Wu
- College of Science & Technology, Hebei Agricultural University, Huanghua, Hebei 061100, China
| | - Xin Zhou
- College of Science & Technology, Hebei Agricultural University, Huanghua, Hebei 061100, China
| | - Jiantong Li
- College of Science & Technology, Hebei Agricultural University, Huanghua, Hebei 061100, China
| | - Kesong Yu
- School of Materials Science & Engineering, Zhengzhou University, Zhengzhou 450002, China
| | - Linyan Wang
- College of Science & Technology, Hebei Agricultural University, Huanghua, Hebei 061100, China
| | - Jingjun Ma
- College of Science & Technology, Hebei Agricultural University, Huanghua, Hebei 061100, China
| |
Collapse
|
6
|
Effects of in-situ crystallization on poly (lactic acid) microcellular foaming: Density functional theory and experiment. POLYMER 2020. [DOI: 10.1016/j.polymer.2020.122539] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
|
7
|
Pinchasik BE, Schönfeld F, Kappl M, Butt HJ. Bubbles nucleating on superhydrophobic micropillar arrays under flow. SOFT MATTER 2019; 15:8175-8183. [PMID: 31596303 DOI: 10.1039/c9sm01224a] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
When a supersaturated aqueous solution flows over a microstructured, hydrophobic surface, bubbles tend to nucleate. Here, we control heterogeneous nucleation of gas bubbles from supersaturated CO2 solution. By designing the shape, size, and arrangement of hydrophobic micropillars and by adjusting the flow we obtain uniform nucleation patterns. It is possible to selectively turn nucleation on and off. We use laser scanning confocal microscopy to resolve nucleation in early stages at the micropillar-substrate intersection. Numerical simulations show a correlation between minute pressure drops behind micropillars and nucleation sites. Bubbles nucleate uniformly behind pillars of the same size. The flow profile further contributes to the uniform growth of the bubbles. We control heterogeneous nucleation by varying micropillar geometry or size, flow direction and rate. While nucleation behind square pillars is independent of the flow direction, nucleation behind round micropillars is coupled with the direction. Nucleation behind triangular micropillars is bifurcated. These observations pave the way for the replenishment of the gas layer entrapped in between hydrophobic surface features, needed for superhydrophobicity.
Collapse
Affiliation(s)
- Bat-El Pinchasik
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany and Tel-Aviv University, School of Mechanical Engineering, Faculty of Engineering, Tel-Aviv, Israel.
| | | | - Michael Kappl
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany
| | - Hans-Jürgen Butt
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany
| |
Collapse
|