阅读说明：本技术 一种淀粉磷酸酯及其应用 (Starch phosphate and application thereof ) 是由 罗洪杰 王诏田 张鸿帅 姜昊 于 2020-07-16 设计创作，主要内容包括：本发明实施例公开了一种淀粉磷酸酯及其应用,属于上浆剂技术领域。一种淀粉磷酸酯由以下方法制成：1g淀粉添加到90～110g水中搅拌均匀,并加热到85～95℃,当悬浮液变清澈时,加入1～1.5mL浓度为70～90％的磷酸水溶液,继续搅拌25～35min,制得淀粉磷酸酯。采用本发明的淀粉磷酸酯对玄武岩纤维表面进行涂覆,淀粉磷酸酯的磷酸基团与纤维表面发生化学键合,生成的淀粉磷化物在纤维表面形成均匀致密层,断裂力和断裂伸长率较未处理纤维分别提高47.80％和12.6％,可显著提高纤维的耐磨性。(The embodiment of the invention discloses starch phosphate and application thereof, belonging to the technical field of sizing agents. A starch phosphate is prepared by the following method: adding 1g of starch into 90-110 g of water, uniformly stirring, heating to 85-95 ℃, adding 1-1.5 mL of 70-90% phosphoric acid aqueous solution when the suspension becomes clear, and continuously stirring for 25-35 min to obtain the starch phosphate. The surface of the basalt fiber is coated with the starch phosphate, the phosphate group of the starch phosphate is chemically bonded with the surface of the fiber, the generated starch phosphide forms a uniform and compact layer on the surface of the fiber, the breaking force and the elongation at break are respectively improved by 47.80 percent and 12.6 percent compared with untreated fiber, and the wear resistance of the fiber can be obviously improved.)

1. A starch phosphate is characterized by being prepared by the following method: adding 1g of starch into 90-110 g of water, uniformly stirring, heating to 85-95 ℃, adding 1-1.5 mL of 70-90% phosphoric acid aqueous solution when the suspension becomes clear, and continuously stirring for 25-35 min to obtain the starch phosphate.

2. The starch phosphate according to claim 1, wherein the starch is corn starch.

3. The starch phosphate according to claim 1, characterized in that it is made by the following process: adding 1g of starch into 99g of water, uniformly stirring, heating to 90 ℃, adding 1-1.5 mL of 80% phosphoric acid aqueous solution when the suspension becomes clear, and continuously stirring for 30min to obtain the starch phosphate.

4. Use of the starch phosphate of claim 1 in a basalt fiber sizing agent.

Technical Field

The embodiment of the invention relates to the technical field of sizing agents, and particularly relates to starch phosphate and application thereof.

Background

The basalt fiber is a continuous fiber which is prepared by taking natural volcano eruption rock as a raw material, melting at a high temperature of 1500-1700 ℃ and then rapidly drawing, and the main component of the basalt fiber comprises SiO₂、Al₂O₃、CaO、MgO、Fe₂O₃And FeO, has good mechanical property and high temperature resistanceStable chemical performance, low cost, environmental protection, no toxicity, and no carcinogenic substance or other substances harmful to health. Basalt fiber fabrics have potential application prospects in many fields, such as refractory materials, filtering materials, building materials, heat-insulating materials and the like, but basalt fibers belong to brittle materials, and yarn damage and breakage can be caused by repeated stretching and bending in weaving processing, so that the weaving difficulty is large, and the application is limited. Therefore, basalt fibers are currently generally blended with other soft fibers.

For the reasons mentioned above, the fibers generally need to be covered with a coating, which is the simplest and most effective method of improving spinnability. The fiber sizing is an important process in the fiber processing process, the sizing agent has a lubricating effect on the fiber surface to prevent abrasion and thread breakage in the subsequent processing process, and after drying, the sizing agent forms a thin layer on the fiber surface, wherein the thin layer accounts for 0.2-5% of the weight of the whole fiber. The sizing agent is generally divided into a common fiber sizing agent and a reinforced fiber sizing agent, wherein the common fiber sizing agent enables the fiber to have good subsequent spinnability, and the reinforced fiber sizing agent is used for increasing the bonding strength between the fiber and a matrix.

Starch is a high molecular carbohydrate polymerized from glucose molecules, is a textile sizing agent with low cost, convenient use and environmental protection, and is considered as a sizing agent for replacing polyvinyl alcohol and paraffin for a long time. Although the starch paste has certain adhesion and film forming property, the formed starch film is hard and fragile and has weak bonding force with the surface of the fiber. Therefore, starch is not suitable for direct addition to the sizing agent. Starch is rich in hydroxyl groups, meaning that starch is easily modified.

At present, no reports related to the sizing treatment of the basalt fiber by using the modified starch slurry and the interaction between the surface of the basalt fiber and the coating interface exist.

Disclosure of Invention

Therefore, the embodiment of the invention provides starch phosphate and application thereof.

In order to achieve the above object, the embodiments of the present invention provide the following technical solutions:

according to a first aspect of embodiments of the present invention, there is provided a starch phosphate made by the process of: adding 1g of starch into 90-110 g of water, uniformly stirring, heating to 85-95 ℃, adding 1-1.5 mL of 70-90% phosphoric acid aqueous solution when the suspension becomes clear, and continuously stirring for 25-35 min to obtain the starch phosphate.

Further, the starch is corn starch.

Further, the method comprises the following steps: adding 1g of starch into 99g of water, uniformly stirring, heating to 90 ℃, adding 1-1.5 mL of 80% phosphoric acid aqueous solution when the suspension becomes clear, and continuously stirring for 30min to obtain the starch phosphate.

According to a second aspect of embodiments of the present invention, there is provided the use of the above-described starch phosphate in a basalt fiber sizing agent.

The embodiment of the invention has the following advantages:

the invention adopts starch phosphate to coat the surface of basalt fiber, and carries out system research on the fiber by adopting Fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis (TG), Scanning Electron Microscope (SEM), Atomic Force Microscope (AFM), X-ray photoelectron spectroscopy (XPS), Dynamic Contact Angle (DCA) and tensile test. The conclusion is as follows:

1. the chemical structure and the chemical bonding mode of the material are studied. The results show that the phosphate groups of the starch phosphate are chemically bonded to the fiber surface.

2. Surface morphology studies show that starch phosphide forms a uniform and dense layer, and the surface roughness and the surface area increase with the increase of phosphate groups.

3. Dynamic contact angle studies show that the surface energy is increased after starch phosphate is sized, mainly containing more dispersed components and less polar components.

4. The mechanical property test result of the basalt fiber single yarn shows that SBF-2 has the best mechanical property, the breaking force of the SBF-2 is 47.80 percent higher than BF, and the breaking elongation of the SBF-2 is 12.6 percent higher than BF. The starch phosphate can obviously improve the wear resistance of the fiber.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.

FIG. 1 is an FTIR spectrum of BF, SBF-2 and starch phosphate (prepared by the method of example 2);

FIG. 2 is a TG curve of BF, SBF-1, SBF-2, SBF-3 and BFP;

FIG. 3 is an SEM photograph of BF (a, b), SBF-1(c, d), SBF-2(e, f), SBF-3(g, h) and BFP (i, j);

FIG. 4 is an AFM image of BF (a), SBF-1(b), SBF-2(c), SBF-3(d), and BFP (e);

FIG. 5 shows the roughness of BF, SBF-1, SBF-2, SBF-3 and BFP;

FIG. 6 is an XPS binding energy (B.E.) plot of BF and SBF selected unit orbitals;

fig. 7 shows breaking force and elongation at break of individual yarns of basalt fiber.

Detailed Description

The present invention is described in terms of particular embodiments, other advantages and features of the invention will become apparent to those skilled in the art from the following disclosure, and it is to be understood that the described embodiments are merely exemplary of the invention and that it is not intended to limit the invention to the particular embodiments disclosed. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.