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A method for preparing aliphatic polyester composite materials by surface-modifying biomass fibers with alkyl ketene dimers

A technology of alkyl ketene dimer and biomass fiber, which is applied in the field of cellulose modification and polymer composite materials, to achieve the effect of improving comprehensive performance, low cost, and good reinforcement

Active Publication Date: 2016-05-11
SHAANXI HUAHAOXUAN NEW ENERGY TECH DEV CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] Compared with composite materials prepared by general-purpose plastics, there are still few reports on aliphatic polyester-based composite materials. It is still necessary to research and develop new methods to improve the interface bonding, improve the interfacial bond strength of composite materials, and finally improve the composite material. Use performance to promote the promotion and application of this environmentally friendly material

Method used

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  • A method for preparing aliphatic polyester composite materials by surface-modifying biomass fibers with alkyl ketene dimers
  • A method for preparing aliphatic polyester composite materials by surface-modifying biomass fibers with alkyl ketene dimers
  • A method for preparing aliphatic polyester composite materials by surface-modifying biomass fibers with alkyl ketene dimers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] (1) Preparation of AKD emulsion and surface treatment of poplar wood flour:

[0065] Surface treatment of 80-100 mesh poplar wood powder with commercial AKD emulsion (product of a company in Shandong, 15% solid content, 12% AKD content), the amount of AKD relative to poplar wood powder is 2% (mass fraction), in Stir in a high-speed mixer at 2000r / min for 15min.

[0066] (2) Drying and aging treatment of poplar wood powder modified fiber:

[0067] According to the above surface modification, the poplar wood powder modified fiber was air-dried at 105° C. for 4 hours, and sealed for later use.

[0068] (3) Compounding of poplar wood powder modified fiber and PBS:

[0069] The ratio of materials is as follows: after drying, 30% poplar wood powder modified fiber and 70% PBS are processed in an internal mixer at 120°C for 10 minutes, and hot-pressed to prepare a PBS / poplar wood powder composite material.

[0070] From the comparison of Figure 1a and Figure 1b, it can be se...

Embodiment 2

[0072] (1) Preparation of AKD emulsion and surface treatment of bamboo powder:

[0073] Surface treatment of 60-80 mesh bamboo powder with commercial series AKD emulsion (product of a company in Shandong, 15% solid content, 12% AKD content), the amount of AKD relative to the bamboo powder is 2% (mass fraction), and the Stir for 15 min under the condition of 2000r / min.

[0074] (2) Drying and aging treatment of bamboo powder modified fiber:

[0075] The obtained bamboo powder modified fiber was air-dried at 90° C. for 24 hours, and sealed for future use.

[0076] (3) Compounding of bamboo powder modified fiber and PLA:

[0077] The following mass percentages were used to mix the materials: 35% bamboo powder modified fiber after drying and aging treatment, 65% PLA, milled at 200°C for 8 minutes, and hot-pressed to prepare the PLA / bamboo powder composite material.

[0078] Compared with the composite without adding AKD, the tensile strength of the composite prepared with AKD s...

Embodiment 3

[0080] (1) Preparation of AKD emulsion and surface treatment of bamboo powder:

[0081] Weigh 15 grams of cationic starch, 1.5 grams of lignosulfonate, 17.5 grams of aluminum sulfate, and 846 mL of water, mix thoroughly under stirring conditions, heat at 80°C for 60 minutes, form an emulsifier and place it in an incubator. Heat and melt 120 grams of AKD wax powder (product of a company in Shandong, chain length: C14-C16), fully mix the emulsifier and AKD wax powder, and prepare an emulsion with a mass fraction of 15%.

[0082] Use this emulsion to carry out surface treatment to 60-80 order bamboo powder, stir 20min under the condition of 2000r / min with high-speed mixer.

[0083] (2) Maturation treatment of bamboo powder modified fiber:

[0084] The obtained bamboo powder modified fiber was air-dried at 100° C. for 24 hours, and sealed for later use.

[0085] (3) Compounding of bamboo powder modified fiber and PBS:

[0086] According to the following mass percentage ratio of...

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Abstract

The invention discloses a method for preparing aliphatic polyester composite material by modifying the surface of biomass fiber with alkyl ketene dimer, which comprises the following steps: (1) Preparation of AKD emulsion and its effect on the surface of biomass fiber raw material (2) aging treatment of surface-modified fibers; (3) compounding of surface-modified biomass fibers and aliphatic polyester matrix. Hydrophobic treatment of the surface weakens the interfiber hydrogen bonding, reduces agglomeration in the aliphatic polyester matrix, improves the interfacial strength of the composite material, and makes it have more excellent comprehensive properties, especially mechanical properties. The composite material product has a wide range of applications and can be used in household appliances, automobile industry, packaging, daily necessities and other fields. Moreover, the method has low cost and simple process, is conducive to popularization and application, and has great significance for improving the utilization level of biomass raw materials, alleviating the oil resource crisis and protecting the environment.

Description

technical field [0001] The invention belongs to the field of advanced composite materials, relates to cellulose modification and polymer composite materials, and specifically relates to a method for improving the performance of biomass fiber-aliphatic polyester composite materials by adding alkyl ketene dimer (AKD) . Background technique [0002] Polymer materials have become an important pillar of modern science and technology and national economic construction. Most of their raw materials come from petroleum, and most of them are difficult to degrade. The increasing scarcity of petroleum resources and the pressure of environmental protection make the development of low-carbon, environmentally friendly polymer materials an important task. [0003] Biomass fiber-polymer composite materials are a new type of green composite materials. General-purpose plastics (such as PE, PP, PVC, etc.) or biodegradable plastics (mainly referring to aliphatic polyester materials) can be used...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L67/02C08L67/04C08L97/02C08H7/00C08J3/00
Inventor 岳小鹏徐永建宁宇震凤璐
Owner SHAANXI HUAHAOXUAN NEW ENERGY TECH DEV CO LTD
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