The preparation and properties of polyurethane foams reinforced with bamboo fiber sources in China

Abstract

Polyurethane (PU) foams reinforced with bamboo fiber sources in China, i.e., bamboo fiber, bamboo α-cellulose fiber, and bamboo nanocellulose fiber, were prepared and their physico-mechanical properties were analyzed in this work. The bamboo fiber sources and PU foams were characterized by Fourier transform infrared spectroscopy (FTIR), Scanning electron microscope (SEM), Thermal gravimetric analysis (TGA) and universal compression testing. The results indicated that the hydroxyl groups on the fiber surfaces were enhanced by removing non-celluloses in the preparation of α-cellulose and nanocellulose. With the addition of small particle size α-cellulose and nanocellulose, the cell sizes of PU foams were reduced due to more nucleating agents being introduced. The FTIR spectra confirmed that the bamboo fiber sources were involved in the foaming reaction. The PU foams with bamboo fiber sources had a higher thermal stability than neat foam, and they were satisfactory enough to be used as insulation. PU foams reinforced with 5% bamboo fiber, 3% α-cellulose fiber and 3% nanocellulose fiber had better physico-mechanical performance than other foams. The reinforcement performance of 3% bamboo α-cellulose fiber on PU foam was comparable with that of high-cost nanocellulose. Accordingly, bamboo α-cellulose fiber was demonstrated to be a promising candidate to reinforce PU foam, which could be used in the reinforcement of foam insulation.

Bamboo-Based Biofoam Adsorbents for the Adsorption of Cationic Pollutants in Wastewater: Methylene Blue and Cu(II)

“…The broad band at around 3690 cm –1 corresponded to the −OH stretching vibration. 28 − 30 After alkali and bleach treatments, the peaks of acetyl and uronic ester groups in hemicellulose at 1730 cm –1 and the aromatic ring vibration in lignin at 1450 cm –1 were absent from α-cellulose and nanocellulose. 31 , 32 The peak at 1300 cm –1 was assigned to O–H plane bending in cellulose.…”

“…Fourier transform infrared (FTIR) spectra of bamboo fiber sources are shown in Figure . The broad band at around 3690 cm –1 corresponded to the −OH stretching vibration. − After alkali and bleach treatments, the peaks of acetyl and uronic ester groups in hemicellulose at 1730 cm –1 and the aromatic ring vibration in lignin at 1450 cm –1 were absent from α-cellulose and nanocellulose. , The peak at 1300 cm –1 was assigned to O–H plane bending in cellulose . The enhancement of hydroxyl groups of α-cellulose and nanocellulose at 3690 cm –1 was ascribed to the removal of noncelluloses .…”

“…pubescens) waste according to our previous work. 28 Chemicals, including toluene, ethanol, glacial acetic acid, sodium chlorite, sulfuric acid (H 2 SO 4 , 98 wt %), polyethylene glycol 400, dimethicone, N,N-dimethylformamide (DMF), and sodium hydroxide, were purchased from Kelong Chemical Co. 4.2. Preparation of Biofoam Adsorbents.…”

“…Bamboo fiber sources, i.e., bamboo fiber, bamboo α-cellulose fiber, and bamboo nanocellulose fiber, were prepared from Moso bamboo (Phyllostachys heterocycla cv. pubescens ) waste according to our previous work …”

Morphological, TGA, and FTIR on Rigid Polyurethane Composite Laminated with Untreated and Treated Bamboo Fiber Roof Insulation

“…The performance of roof insulation such as polyurethane decreased due to problems such as insufficient absorption and poor thermal insulation performance, especially during rainstorms. The aims of this study are to investigate the physical property and its potential reinforced material such as rigid polyurethane doped with treated and untreated bamboo fiber composite (RPU-BF) at different ratios of 0, 25,30,35, and 40% of bamboo fibers as an insulation material for roof applications. The bamboo fibers were treated by using silane coupling agent treatment.…”