COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2025
·
IF 5.4
Hao Yuan,Hanxiang Guo,Zhaosheng Huang,Ping Zhang,Zhe Wang,Chunde Jin
Traditional polyurethane coatings are typically synthesized from non-renewable petrochemical resources, which contradicts modern environmental principles. This paper aims to develop eco-friendly polyurethane wood coatings and enhance coating properties. CO 2 -based polyurethane (PU) was first synthesized by using CO 2 -based polyols instead of petroleum-based polyols and reacting them with isocyanates. The properties of PU coatings such as corrosion resistance, hardness, and adhesion were improved by introducing soybean oil-based polyols (P-ESO) from ring-opening reactions of epoxidized soybean oil (ESO) during the synthesis process. P-ESO-CO 2 -based PU (SPU) wood coatings demonstrated superior tensile strength and adhesion values of 0.77 MPa and 3.66 MPa, respectively, and exhibited a hydrophobicity with a water contact angle of 102°. Hence, SPU holds greater promise and potential for future development in the field of environmentally friendly wood coatings.
研究领域:
材料科学
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化学工程
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2022
·
IF 6.206
Jiao Wei,Yuanchuan Ma,Yuquan Cai,Jieyuan Zheng,Hong Fan
In this work, a self-emulsifying CO 2 -based polyol (LAPEC) was prepared by the terpolymerization of propylene oxide , allyl glycidyl ether and CO 2 , followed by thiol-ene click reaction with mercaptopropionic acid. And the carboxyl group was successfully introduced into LAPEC verified in 1 H NMR. LAPEC was served as both soft segments and internal emulsifiers for WPU . Meanwhile, γ-aminopropylmethyldiethoxysilane (KH902) was also employed to improve the mechanical properties of WPU . Compared to dimethylol propionic acid (DMPA), WPU emulsion prepared by LAPEC had smaller particle size and higher emulsification efficiency. And the performance differences between LAPEC-based WPU films (LWPUs) and DMPA-based WPU films (DWPUs) with different hard segment contents were studied. The stronger hydrogen-bonding interactions improved the tensile strength , toughness and thermal stability. Compared with DWPU, the tensile strength and the elongation at break of LWPU respectively increased from 17.8 to 21.1 MPa and from 302.3 % to 356.5 %, when their hard segment content was both maintained around 37 wt%. Meanwhile, due to rougher surfaces and more hydrophobic silicon clusters, LWPU had stronger surface hydrophobicity . Therefore, LAPEC can provide a new way to synthesize WPU with high toughness and can be potentially used for flexible substrate coatings in the future.
研究领域:
材料科学
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化学工程
✓ 已验证
DOI
高影响因子
GREEN CHEMISTRY
·
2015
·Vol. 18
·期 2
·524-530
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IF 8.02
Jin Wang,Hongming Zhang,Yuyang Miao,Lijun Qiao,Xianhong Wang,Fosong Wang
Carbon dioxide based oligo(carbonate–ether) diols (CO2-polyols) with both carbonate units and ether units in one polymer chain were prepared by copolymerization of CO2 and propylene oxide (PO) using a zinc–cobalt double metal complex as the catalyst, and used to prepare CO2 based waterborne polyurethanes (CO2-WPUs). The carbonate units in CO2-polyols improved the mechanical and oxidation resistance properties of CO2-WPUs, while the ether units in CO2-polyols enhanced the hydrolysis resistance of CO2-WPUs. The tensile strength of CO2-WPUs didn't show any obvious drop during immersion in a 0.25% sodium hydroxide solution, whereas that of oligoesterol based WPUs dropped over 50% after 300 min, and lost their mechanical properties after 520 min of immersion. Meanwhile, the retention of the tensile strength of the CO2-WPUs was ca. 72% even after 46 h of immersion in a 6 wt% H2O2 solution, while it was only ca. 32% for the oligoetherol based WPUs. Moreover, the thermal–mechanical performance of CO2-WPU films can be conveniently improved by adjusting the carbonate unit content (CU%) in CO2-polyols, i.e. when CU% in CO2-polyol increased from 30% to 66%, the glass transition temperature (Tg) increased from −7.8 °C to 18.8 °C, accompanied by an increase of tensile strength from 35.6 MPa to 52.2 MPa, and a decrease of elongation at break from 630% to 410%. This work suggests that the CO2-WPU may be a promising alternative to conventional WPU whose oligoetherol and oligoesterol were from fossil resources, and its comprehensive hydrolysis/oxidation resistance may be a bonus unavailable from common oligomerol based WPUs.
研究领域:
材料科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POLYMER RESEARCH
·
2022
·Vol. 29
·期 11
·1-12
·
IF 3.061
He Zonglin,Xian Wenqi,Ding Zhu,Wang Chaozhi,Huang Zhenhong,Song Lina,Liu Baohua
Propylene carbonate diols (PCD) were synthesized from propylene carbonate and ethylenediamine (EDA), iso-phorone diamine (IPDA) and diethylenetriamine (DETA), respectively. The obtained PCDs were used as extenders to prepare the waterborne polyurethane (WPU). The properties of PCD based WPUs were compared to the that of WPU used butane-1,4-diol (BDO) as extender. The structures of PCDs were characterized by Fourier transform infrared (FTIR) and nuclear magnetic resonance (NMR). The yields, melting points and viscosity of PCDs were tested. The mechanical properties, water absorption, water contact angle, adhesion, pencil hardness, thermal gravimetric analysis (TGA), differential scanning calorimeter (DSC) and dynamic mechanical analysis (DMA) of WPU films were also characterized. The results showed that PCDs with urethane bond in the structure were successfully synthesized and the yields were approximately 99% after 3 h of reaction. Compared to the WPU used BDO as extender, WPU films derived from PCDs exhibited superior tensile strength, outstanding adhesion and pencil hardness, lower water contact angle and water absorption, and higher initial thermal decomposition temperature.
研究领域:
材料科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POLYMER RESEARCH
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2024
·Vol. 31
·期 10
·1-11
·
IF 2.6
Chen Yueqing,Huang Zhenhong,Chen Haijian,Ai Jiaoyan,Song Lina,Liu Baohua
Waterborne polyurethanes emulsions (WPU) based on polyethylene carbonate diol (PECD) were synthesized, characterized and modified by polypropylene carbonate diol (PPCD) and organosilicon KH-792. The mechanical, thermal and hydrolysis resistance properties of waterborne polyurethanes were comprehensively investigated. The results show that PECD based WPU has very excellent mechanical properties. The tensile strength and the elongation at break the PU was up to 73 MPa and 1040%, which was much higher than that reported for similar types of PPCD-based WPU. It was found that water absorption of PECD based WPU can be decreased dramatically, from 40.9% to 21.1%, after 50% PECD was replaced by PPCD, while tensile strength only decreased from 73.0 MPa to 63.4 MPa. The addition of KH-792 has great influence on PECD based WPU, when 1% KH-792 was added, the water absorption rate decreased from 21.1% to 11.88%, the mechanical strength remained at 63.3 MPa, the WPU film remained transparent after soaking in 80 ℃ hot water for 4 h.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）