• Title, Summary, Keyword: bio-polyurethane

Search Result 36, Processing Time 0.036 seconds

Synthesis and Characterization of Polyurethane for Artificial Leather Using Bio Polyol (바이오 폴리올을 이용한 인공피혁 코팅용 폴리우레탄의 합성 및 특성)

  • Sur, Suk-Hun;Choi, Pil-Jun;Ko, Jae-Wang;Lee, Jae-Yeon
    • Textile Coloration and Finishing
    • /
    • v.30 no.4
    • /
    • pp.321-328
    • /
    • 2018
  • Wet polyurethane resin was synthesized by using polytrimethylene ether glycol prepared from 1,3-propanediol produced by fermentation from corn sugar as bio polyol and polyether-polyol(PTMG). Physical properties and cell characteristics by wet coagulation were investigated using the synthesized wet polyurethane resin. The tensile strength of wet polyurethane resin decreased with increasing content of bio polyol as copolymer polyol, but it tended to increase elongation at break and tear strength. As a result of thermal characteristic analysis, it was found that the glass transition temperature was slightly increased as the content of bio polyol increased. As a result of comparing the cell characteristics by the wet coagulation method, it was found that the shape of the cell was good when the ether polyol and the bio polyol were used alone.

Preparation and Properties of Polyurethanes Containing Polycarbonate Polyol/Bio Polyol for Wet Type Artificial Leather (폴리카보네이트 폴리올/바이오 폴리올을 이용한 습식 인조피혁용 폴리우레탄의 제조 및 물성)

  • Sur, Suk-Hun;Ko, Jae-Wang;Choi, Pil-Jun;Lee, Jae-Yeon;Lee, Young-Hee;Kim, Han-Do
    • Clean Technology
    • /
    • v.25 no.2
    • /
    • pp.114-122
    • /
    • 2019
  • The synthesis of bio polyol from renewable resources has attracted attention in recent years. In particular, it is important to take advantage of bio polyols in the synthesis of polymers. In this study, a series of dimethylformamide (DMF) based polyurethanes were synthesized using polycarbonate polyol/bio polyol (PO3G: polytrimethylene ether glycol prepared from 1, 3-propanediol produced by fermentation from corn sugar), methylene diphenyl diisocyanate (MDI) and 1,4-butandiol (BD). The properties of prepared polyurethane films and the cell structure of wet type artificial leather were investigated. As the bio polyol content increased, the tensile strength of polyurethane films decreased, however, the elongation at break increased significantly. As a result of thermal characteristics analysis, the glass transition temperature of polyurethanes increased when increasing the content of polycarbonate polyol. As a result of comparing the cell characteristics of wet type artificial leathers prepared in this study, it was found that the number and uniformity of cells formed in the artificial leather samples increased when increasing the content of polycarbonate polyol in polycarbonate polyol/bio polyol. From these results, it was found that DMF-based polyurethane containing an appropriate amount of bio polyol could be used for wet type artificial leather. The bio textile analysis system according to ASTM standard was used to measure the bio carbon content of polyurethane. The content of bio carbon increased proportionally with the increase of bio polyol content used in polyurethane synthesis.

Synthesis of Biomass-derived Polyurethane by Chain Extender Type

  • Sohn, Mi Hyun;Li, Xiang Xu;Cho, Ur Ryong
    • Elastomers and Composites
    • /
    • v.54 no.4
    • /
    • pp.279-285
    • /
    • 2019
  • Bio-based polyester polyols were synthesized using esterification with azelaic acid, sebacic acid, and 1,3-propanediol. Polyurethanes were prepared using chain extenders (1,4-Butanediol, 1,3-Propanediol, and isosorbide) and 4,4'-diphenylmethane diisocyanate with a mixing ratio of 1:1:1.1. Subsequently, the properties of the polymers prepared using the different chain extenders were compared. The synthesis of polyurethane was confirmed by FT-IR, TGA, and GPC. The mechanical properties (hardness, ball rebound, and tensile strength) of the materials were analyzed using shore A tester, taber abrasion, and UTM. heat, chemical, and water resistances of the prepared materials were measured by comparing the tensile strengths according to external changes.

A Study on the Bio-Based Polyurethane (바이오 폴리우레탄에 관한 연구)

  • Ko, Jong-Sung;Lee, Jin-Hui;Sung, Ki-Chun
    • Journal of the Korean Applied Science and Technology
    • /
    • v.29 no.3
    • /
    • pp.531-542
    • /
    • 2012
  • The thesis covers the trend of research on bio-based polyurethane which is made from polyols derived mainly from plant oils and isocyanates. Castor oil is a triglyceride of ricinoleic acid containing hydroxyl group. Hydroxylation is done on the unsaturated bonds of the oils by the reactions of epoxidation/ring opening, hydroformylation/hydrogenation, ozonolysis/hydrogenation, and thiol-ene reaction. Polyols from hyperbranch, primary alcohol, polysaccharide have been studied to control the reactivity of the polyol and morphology of the microdomains. Besides, researches cover biodegradable polylactic acid polyol for medical use, fatty acid dimer polyol for the prevention of hydrolysis, and polyol with ionic group for water-borne polyurethane. Bio-based polyurethanes are being used in flexible and rigid foams, coatings, sealants, and elastomers.

Preparation and Properties of DMF-Based Polyurethanes Containing Bio-Polyol/Ester-Polyol for Wet-Type Polyurethane Artificial Leather (습식 인조피혁용 바이오 폴리올/폴리에스터 폴리올을 함유한 DMF 기반 폴리우레탄의 제조 및 물성)

  • Sur, Suk-Hun;Choi, Pil-Jun;Ko, Jae-Wang;Park, Ji-Hyeon;Lee, Jae-Yeon;Lee, Young-Hee;Kim, Han-Do
    • Clean Technology
    • /
    • v.25 no.1
    • /
    • pp.7-13
    • /
    • 2019
  • Recently, attention has been paid to obtaining bio-polyols from renewable resources. Successful use of these natural ingredients successfully produced in the industry for the synthesis of various polyurethanes is a very important task. In this study, a series of dimethylformamide (DMF) based polyurethanes were synthesized from methylene diphenyl diisocyanate (MDI)/1, 4-butanediol and bio-polyol (polytrimethylene ether glycol based on 1, 3-propanediol : B-POL)/polyester polyol (polyadipate diol based on 1,4-butandiol : H-PET). The effect of different ratio of bio-polyol (B-POL)/polyester polyol (H-PET) on the physical properties of polyurethane was investigated. As the B-POL content in B-POL/H-PET mixture increased, the glass transition of soft segment (Tgs) and tensile strength of polyurethane decreased, however, the elongation at break and tear strength increased. On the other hand, artificial leather was produced by wet process using synthesized DMF-based polyurethanes. It was found that there was almost no difference in the effect of the B-POL/H-PET composition on the average size and density (the number of cells per unit volume) of the porous cells formed in artificial leather. These results show that there is no problem in using bio-polyol (B-POL) based polyurethane for artificial leather produced by wet process.

Effect of treatment temperature on mechanical properties of silk textiles made with silk/polyurethane core-spun yarn

  • Bae, Yeon Su;Um, In Chul
    • International Journal of Industrial Entomology
    • /
    • v.33 no.2
    • /
    • pp.108-112
    • /
    • 2016
  • Silk has been used extensively in textile applications because of its good luster and feel. However, the low elongation and elastic recovery of silk has limited its use in a wider variety of textile applications. In this study, silk textile samples were made with a highly twisted silk/polyurethane core-spun yarn. They were immersed in water and dried at different temperatures, and the effect of treatment temperature on the mechanical properties of the silk textile was examined. It was found that the water temperature strongly affected the morphology and mechanical properties of the silk textile, whereas the drying temperature did not. As the water temperature was increased, the weft silk yarn became tangled and the interval between warp yarns decreased, resulting in shrinkage of the silk textile. When the silk textile was immersed in water at high temperature (i.e., $100^{\circ}C$), the elongation of the textile increased eight-fold as compared to an untreated silk textile. The maximum elastic recovery ratio of the silk textile was 96.7%.

Synthesis and Properties of Bio-Thermoplastic Polyurethanes with Different Isocyanate Contents

  • Li, Xiang Xu;Sohn, Mi Hyun;Cho, Ur Ryong
    • Elastomers and Composites
    • /
    • v.54 no.3
    • /
    • pp.225-231
    • /
    • 2019
  • Bio-based polyester polyol was synthesized via esterification between azelaic acid and isosorbide. After esterification, bio-based polyurethanes were synthesized using polyester polyol, 1,3-propanediol as the chain extender, and 4,4'-diphenylmethane diisocyanate, in mixing ratios of 1:1:1.5, 1:1:1.8, 1:1:2, and 1:1:2.3. The bio TPU (Thermoplastic Polyurethane) samples were characterized by using FT-IR (Fourier Transform Infrared Spectroscopy), TGA (Thermal Gravimetric Analysis), DSC (Differential Scanning Calorimetry), and GPC (Gel Permeation Chromatography). The mechanical properties (tensile stress and hardness) were obtained by using UTM, a Shore A tester, and a Taber abrasion tester. The viscoelastic properties were tested by an Rubber Processing Analyzer in dynamic strain sweep and dynamic frequency test modes. The chemical resistance was tested with methanol by using the swelling test method. Based on these results, the bio TPU synthesized with the ratio of 1:1:2.3, referred to as TPU 4, showed the highest thermal decomposition temperature, the largest molecular weight, and most compact matrix structure due to the highest ratio of the hard segment in the molecular structure. It also presented the highest tensile strength, the largest elongation, and the best viscoelastic properties among the different bio TPUs synthesized herein.

Production of Biopolyols, Bioisocyanates and Biopolyurethanes from Renewable Biomass (바이오매스 자원을 활용한 바이오폴리올, 바이오이소시아네이트 및 바이오폴리우레탄 제조)

  • Jo, Yoon Ju;Choi, Sung Hee;Lee, Eun Yeol
    • Applied Chemistry for Engineering
    • /
    • v.24 no.6
    • /
    • pp.579-586
    • /
    • 2013
  • The shortage of fossil fuel and problem of greenhouse gas exhaustion drive the production of biopolymer in a environment-friendly manner. Polyurethane is a polymer formed by reacting an isocyanate (-NCO) with a polyol (-OH) to form urethane link (-NHCOO-). Polyurethane is one of the most widely used polymers in automobile, construction and chemical industries. Two monomers for the polymerization of polyurethane, polyols and isocyanates, can be produced from renewable biomass such as plant oil, cellulose, lignin and etc. Biopolyol production from plant oil has already been implemented in commercial-scale production. In this paper, recent progresses on bio-based approaches on the production of biopolyols, bio-isocyanates and bio-substituent or isocyanate from bio-feedstock are reviewed alongside polymerization and characterization of biopolyurethane for industrial applications.

Property Comparison of Bio-Polyurethane and Petroleum based Polyurethane (바이오 폴리우레탄과 석유기반 폴리우레탄의 물성 비교)

  • Lee, Dam Hee;Lee, Kwan Hee;Cho, Ur Ryong
    • Journal of the Semiconductor & Display Technology
    • /
    • v.17 no.2
    • /
    • pp.47-52
    • /
    • 2018
  • The three polyols, poly(trimethylene ether) glycol 2000, poly(tetramethylene ether) glycol 2000 and poly (tetramethylene ether) glycol 1000 were reacted with 4,4-diphenylmethane diisocyanate to get polyurethanes. The synthesized three polyurethanes were measured by FT-IR, NMR for investigating chemical structures. Through two spectroscophical methods, It is found that urethane group exists in the three polymers. From the evaluation of hardness, glass transition temperature, tensile strength, and water resistance, the results showed increasing order of Poly(tetramethylene ether) glycol 1000 > Poly(trimethylene ether) glycol 2000 > Poly(tetramethylene ether) glycol 2000 with the content of hard segment in polyurethane.