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A kind of whole cellulose composite material and preparation method thereof

A composite material and whole cellulose technology, which is applied in the field of full cellulose composite materials and its preparation, can solve the problems of lack of thermoplasticity and unsuitability for bioplastic products, and achieve the effect of improving interface compatibility and improving mechanical properties

Active Publication Date: 2020-11-24
JIAXING UNIV
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Problems solved by technology

However, this method is limited to cellulose and is limited to the preparation of whole cellulose films by partial dissolution method, which is not thermoplastic and not suitable for industrial production of bioplastic products by thermal processing

Method used

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  • A kind of whole cellulose composite material and preparation method thereof
  • A kind of whole cellulose composite material and preparation method thereof
  • A kind of whole cellulose composite material and preparation method thereof

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Embodiment Construction

[0019] In order to illustrate the content of the present invention more clearly, specific examples are used to illustrate the following, and the specific examples do not limit the scope of the content of the present invention.

[0020] Because the mechanical properties of this cellulose composite mainly depend on the degree of acetylation substitution, crystal structure, morphology and so on of the added cellulose. Focus on optimizing the preparation process of acetylated cellulose, and adjust the degree of substitution of acetylation of cellulose and the crystallinity of cellulose itself by controlling the time for the preparation of acetylated cellulose catalyzed by iodine, so that cellulose acetate can be improved with acetic acid through acetylation The compatibility of cellulose can ensure sufficient mechanical strength. Finally, the mechanical properties of thermoplastic cellulose are significantly improved.

[0021] Preparation of semi-crystalline acetylated derivative...

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Abstract

The invention relates to a holocellulose composite material and a preparation method thereof. Cellulose with the acetylated surface layer is prepared by adopting iodine catalysis and is adopted as a mechanical-enhancement filler fiber, and the surface of cellulosic fiber is gradually acetylated under iodine catalysis. Through the acetylation treatment of the cellulosic fiber, the compatibility ofthe cellulosic fiber and cellulose acetate is improved, but the crystallinity of the cellulose is also reduced, and the tensile strength of fiber is weakened, so that the substitution of acetyl on thefiber is controlled by the reaction time so as to balance two contrary functions, and thus the optimization is realized. The cellulose used as the mechanical-enhancement filler is partially acetylated and modified and is hot blended with plasticized CDA so as to prepare a full cellulose acetate composite material, and a matrix and a filler are provided with acetyl on the surfaces and have the similar chemical structures, so that by adding partially acetylated cellulose, the interfacial compatibility between the CDA matrix and the acetylated cellulosic fiber can be promoted to be improved, andfinally, the mechanical performance of the composite material is improved.

Description

technical field [0001] The invention relates to the technical field of biological composite materials, in particular to an all-cellulose composite material and a preparation method thereof. Background technique [0002] In the past ten years, due to the advantages of biomaterials such as degradability, renewability, and inexhaustibility, research on the replacement of traditional plastics by biocomposites has received extensive attention. Cellulose and its derivatives, as the most abundant and inexhaustible raw materials on earth, are considered to be ideal bio-based polymer materials, which can meet the industry's growing demand for eco-friendly and environmentally friendly biomaterials in the future. In industry, cellulose acetate (CDA), as the main cellulose derivative, has been widely used in textile, packaging, cigarette filter and other industries. However, as a biodegradable plastic material, further improvement of its mechanical properties is needed to meet industri...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L1/12C08B3/06
CPCC08B3/06C08L1/12C08L2205/025
Inventor 陈超赵健伟陈峰刘连梅程娜贺园园
Owner JIAXING UNIV
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