Abstract
The present work addresses the optimization of temperature-increasing, environmentally friendly biodegradable film with titanium dioxide and rice straw fiber using response surface methodology (RSM) analysis. The effects of the various process parameters (basis weight, neutral sizing agent, addition ratio of titanium dioxide, wet strength agent, and beating degree) on the dry tensile strength, wet tensile strength, and light-scattering coefficient of the fiber film are reported. The optimal technical parameters of the temperature-increasing film made from titanium dioxide and rice straw fiber included a 64 to 68 g/m2 basis weight, 1.55% to 1.60% wet strength agent, 0.9% neutral sizing agent, 18% addition ratio of titanium dioxide, and 35°SR beating degree. Under this condition, the dry tensile strength, wet tensile strength, and light-scattering coefficient were higher than 30 N, 10 N, and 45 m2/kg, respectively. The film was characterized using Fourier transform infrared (FTIR) spectroscopy. In addition, the resulting film met the requirements of mechanical properties for field mulching and agronomic requirements for crop growth. The results provided a reference for the preparation of fiber film suitable for the temperature required for crop growth.
Highlights
Plant fiber film refers to a kind of agricultural film made from plants such as hardwood, coniferous wood, straw, hemp, reed, waste cotton, and other natural raw materials; it is considered a degradable film with real application value due to its environmental friendliness and regenerability (Jia and Xu, 2011; Li and Li, 2017; Liu et al, 2017; Naili et al, 2017; Qian and Qian, 2016; Wei et al, 2018; Zhang and Ma, 2018)
Rice straw fiber produced by a D200 straw fiber extruder (Northeast Agriculture University, Harbin, China)in the fall of 2017 was used as raw material (Liu and Yu, 2002; Shi and He, 2003)
The as-prepared products were characterized by Fourier transform infrared (FTIR), which showed the presence of —OH, C—H, and C—H glycosidic bond functional groups
Summary
Plant fiber film refers to a kind of agricultural film made from plants such as hardwood, coniferous wood, straw, hemp, reed, waste cotton, and other natural raw materials; it is considered a degradable film with real application value due to its environmental friendliness and regenerability (Jia and Xu, 2011; Li and Li, 2017; Liu et al, 2017; Naili et al, 2017; Qian and Qian, 2016; Wei et al, 2018; Zhang and Ma, 2018). Straw fiber film is mainly made by the traditional papermaking process, using straw pulp as a basic raw material and adding environmentally friendly functional additives. The three methods of heat transfer are thermal conduction, thermal radiation, and thermal convection (Hartnett and Rohsenow, 1998; Kreith, 1997; Siegel, 1981). Thermal radiation does not require a medium, and it can pass through vacuum and transfer heat energy in the form of infrared electromagnetic waves such that the heat transfer rate is the fastest. Thermal conduction requires the presence of a medium, but heat can diffuse without the need for the medium itself to move to transfer thermal energy. Based on the above three methods of heat transfer, only thermal conduction can be used to increase the temperature-increasing performance of straw fiber film
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