Papers by Keyword: Hemp Fiber

Abstract: The plasma was used to assist hemp fiber degumming. After degumming, the relationship of the hemp fiber fineness and chemical composition was analyzed through the Grey Relation Analysis. The results indicates that pectin content is bigger than hemicellulose and lignin content on the influence of hemp fiber fineness, and the influence of cellulose content is small. This conclusion is consistent with the actual production and the experience of technical personnel.The pectin, hemicellulose, and lignin are therefore the main content to be removed in the plasma assisted degumming.

Abstract: In this paper, we firstly treated the hemp fiber with alkali solution, followed by chemical modification with silane agents: 3-(Trimethoxysilyl) propyl methacrylate (MPS), N-[3-(Trimethoxysilyl) propyaniline (PAPS) and (3-Aminopropyl) triethoxysilane (APS), respectively. These treated fibers were then blended with polypropylene (PP). SEM morphology and FT-IR spectra confirmed the successful modifications of MPS, PAPS and APS with hemp fiber. The tensile tests results showed that APS improved the mechanical properties of composite, due to the amino of APS could react with maleic anhydride forming amide covalent bond which is benefit in the stress transferring from PP matrix to fiber. In contrast, since the incompatibility of aniline with propylene, PAPS modification decreased the fracture stress composites. The existences of ester and vinyl groups in MPS contributed to the increase of composite fracture strain caused by chain slips.

Abstract: The sport shoes should have moisture absorbing & quick drying property, the quick-drying property of the shoes is affected by the shoe material such as upper, lining and insole. In this paper, three types shoes were prepared with hemp/polyester blended fabric, cotton and polyester. Their quick-drying properties of were studied using methods such as static simulation and animated simulations. The hemp/Polyester shoe possesses better moisture absorbent and quick drying property.

Abstract: This paper used X-ray diffraction, infrared spectroscopy and nuclear magnetic resonance (NMR) to determine the crystallinity of hemp fiber. The results show that the order of crystallinity is Segal method > Peak deconvolution method > Newman method > Infrared spectroscopy method. Both empirical formula and peak deconvolution method lead to deviation of crystallinity value. However, there is a less inaccuracy in peak deconvolution than empirical formula and could get detailed crystal parameters. Therefore, peak deconvolution method is more suitable than empirical formula for determination of crystallinity of hemp fiber.

Abstract: Application of hemp fiber to low-carbon design can realize conceptual innovation. This article takes low-carbon clothing as development objective, and excavates and develops its huge competitive advantages on the low-carbon clothing application aspect through studying the practical applicability of hemp fiber. Starting from green regeneration of hemp fiber, the designers would play their design creativity on the basis of visual effect, tactile effect, integral feeling and other aspects, and endow the hemp fabric more design philosophy and flexile technique of expression applying the design skills and the green concept.

Abstract: The impact of the deteriorating environmental issues on human survival and constraints on social development promotes awakening of environmental awareness, while the expanding of low-carbon consumption market and low-carbon technology revolution triggered by low-carbon economy model, has established a new direction for the garment industry, that is, low-carbon fashion. In order to comply with the objectives of environmental sustainable development, exploiting environmental and low-carbon textile materials has become one of the trends for textiles in 21st century. Regarding carbon materials as the core, this paper firstly discusses the concept and research significance of low-carbon materials, then enumerates several new low-carbon textile materials’ performance and applications: hemp fiber, colored cotton fabric, bamboo fiber, chitin fiber, etc. Through these listed above, it indicates the trend for low-carbon textile materials.

Abstract: Hemp fiber automotive interior materials had been developed for innovative design of the duct of air-laid machine. Gambit software was adopted to form a network of two-dimensional modeling and meshing to the air duct. At the same time, Fluent software was used for simulation and numerical analysis, then we received the pressure contours of the internal flow field, the speed of cloud images and the velocity vector. By analyzing the simulation results, the flow parameters and force and movement of fiber were displayed intuitively. In addition, the focus was that the reasonableness of the design of the duct cross-section shape and the parameters were verified. Providing a certain foundation to further enhance the clutter distribution of hemp fiber in an air duct, and the development of mechanical properties of the stability of automotive interior materials.

Abstract: Micro-environments of shoes cavity after strenuous exercise were simulated by using self-made experimental device. The moisture absorption and moisture desorption of the hemp/pet/cotton blend fabric with different content of hemp were investigated under different conditions of temperature and humidity. The result shows that hemp has very good moisture absorption and the highest evaporation rates among the three materials in the high humidity environment. It took less time for hemp to attain an equilibrium of water. These characteristics complement the hydrophobicity of polyester and the moisture liberation of cotton. Shoes with hemp/pet/cotton blend fabric could faster absorb the sweats in the shoes-cavity, and reduce the humidity effectively, then improve wearing comfort.

Abstract: The paper starts with the fiber strength which is one of the most important factors that could influence the fiber spinnability. By discussing the relationship between fiber strength and its four chemical compositions and analyzing the relevance between them with the method of grey correlation, this research come to a conclusion that the content of cellulose influence most on the fiber strength, and the second is lignin. Then set up four grey models between the fiber strength and pectin, hemicellulose, cellulose and lignin, and carry on error analysis at last. This paper makes a contribution to provide the theoretical basis to the research and development of the hemp fiber.

Abstract: Natural fiber reinforced composites are being used as reinforcement material in composite system due to their positive environmental benefits. Added to that, natural fibers offer advantages such as low density, low cost, good toughness, high specific strength, relatively non-abrasive and wide availability. However, the low thermal stability of natural fibers is one of the major challenges to increase their use as reinforcing component. In this study, a thorough investigation has been done to compare the effect of two chemical treatment methods on the thermal stability of hemp fibers. 5wt% sodium hydroxide and 5wt% triethoxyvinylsilane was used for the treatment of hemp fibers. Fourier transform infrared spectroscopy, scanning electron microscopy and thermo gravimetric analysis were used for characterization of untreated and treated fiber. The results indicated that 24 hours alkali treatment and 3 hours silane treatment time enhanced the thermal stability of the hemp fiber. However, alkali treatment shows better improvement compared to silane treatment.