WO2022237200A1 - 一种柔性溶胶凝胶抛光块体的制备方法 - Google Patents

一种柔性溶胶凝胶抛光块体的制备方法 Download PDF

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Publication number
WO2022237200A1
WO2022237200A1 PCT/CN2021/143448 CN2021143448W WO2022237200A1 WO 2022237200 A1 WO2022237200 A1 WO 2022237200A1 CN 2021143448 W CN2021143448 W CN 2021143448W WO 2022237200 A1 WO2022237200 A1 WO 2022237200A1
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Prior art keywords
gel
sol
polishing
flexible
gelling agent
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PCT/CN2021/143448
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English (en)
French (fr)
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陆静
徐西鹏
杨磊
申云
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华侨大学
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Priority to JP2023524181A priority Critical patent/JP7511297B2/ja
Publication of WO2022237200A1 publication Critical patent/WO2022237200A1/zh
Priority to US18/111,128 priority patent/US20230202000A1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D18/00—Manufacture of grinding tools or other grinding devices, e.g. wheels, not otherwise provided for
    • B24D18/0009—Manufacture of grinding tools or other grinding devices, e.g. wheels, not otherwise provided for using moulds or presses
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C67/00—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00
    • B29C67/24—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00 characterised by the choice of material
    • B29C67/242—Moulding mineral aggregates bonded with resin, e.g. resin concrete
    • B29C67/243—Moulding mineral aggregates bonded with resin, e.g. resin concrete for making articles of definite length
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B37/00—Lapping machines or devices; Accessories
    • B24B37/11—Lapping tools
    • B24B37/20—Lapping pads for working plane surfaces
    • B24B37/24—Lapping pads for working plane surfaces characterised by the composition or properties of the pad materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D18/00—Manufacture of grinding tools or other grinding devices, e.g. wheels, not otherwise provided for
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D18/00—Manufacture of grinding tools or other grinding devices, e.g. wheels, not otherwise provided for
    • B24D18/009—Tools not otherwise provided for
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D3/00—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D3/00—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents
    • B24D3/02—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents the constituent being used as bonding agent
    • B24D3/20—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents the constituent being used as bonding agent and being essentially organic
    • B24D3/28—Resins or natural or synthetic macromolecular compounds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/0013—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor using fillers dispersed in the moulding material, e.g. metal particles
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K3/00—Materials not provided for elsewhere
    • C09K3/14—Anti-slip materials; Abrasives
    • C09K3/1454—Abrasive powders, suspensions and pastes for polishing
    • C09K3/1481—Pastes, optionally in the form of blocks or sticks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2001/00—Use of cellulose, modified cellulose or cellulose derivatives, e.g. viscose, as moulding material
    • B29K2001/08—Cellulose derivatives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2005/00—Use of polysaccharides or derivatives as moulding material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/0058—Liquid or visquous
    • B29K2105/0061—Gel or sol
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2307/00—Use of elements other than metals as reinforcement
    • B29K2307/04—Carbon
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2507/00—Use of elements other than metals as filler
    • B29K2507/04—Carbon
    • B29K2507/045—Diamond

Definitions

  • the invention belongs to the technical field of precision machining of hard materials, and in particular relates to a preparation method of a flexible sol-gel polishing block.
  • the purpose of the present invention is to overcome the defects of the prior art and provide a method for preparing a flexible sol-gel polishing block.
  • a method for preparing a flexible sol-gel polishing block characterized in that it comprises the following steps:
  • gelling agent and hard abrasive are put into deionized water and stirred evenly, and this gelling agent is ⁇ type carrageenan, gellan gum, sodium carboxymethyl cellulose or konjac gum;
  • step (2) add 400 purpose carbon fiber in the material of step (1) gained and mix evenly;
  • the content of W20 diamond abrasive is 9-11wt%
  • the content of gel agent is 2.9-3.1wt%
  • the content of carbon fiber is 30-40wt%.
  • the gelling agent is ⁇ -type carrageenan, and the curing is soaked in KCl solution.
  • the gelling agent is konjac gum, and the solidification is soaked in CaCl solution.
  • the gelling agent is sodium carboxymethyl cellulose, and the solidification is soaked in Al 2 (SO 4 ) 3 solution.
  • the gelling agent is gellan gum, and the solidification is soaked in KCl solution.
  • the content of the gel agent is 3wt%, and the content of the gel skeleton is 30wt%.
  • the present invention adds a specific proportion of carbon fiber, so that the prepared flexible sol-gel polishing block has a porous structure, which improves the processing effect of the polishing tool
  • the flexible sol-gel polishing block prepared by the present invention is no longer just coated with one layer on the surface, but the entire substrate can be used for polishing, which improves the service life of the polishing tool.
  • Fig. 1 is a photograph of gel agglomeration with different gelling agent contents in Example 1 of the present invention.
  • Fig. 2 is a comparison chart of characteristics of gel agglomeration with different contents of gelling agent in Example 1 of the present invention.
  • Fig. 3 is a photograph of gel agglomeration with different carbon fiber contents in Example 2 of the present invention.
  • Fig. 4 is the gel agglomeration photo of using konjac gum as a gelling agent in Example 3 of the present invention.
  • Fig. 5 is a microscopic morphology diagram of gel agglomerates using konjac gum as the gelling agent in Example 3 of the present invention.
  • Fig. 6 is an effect diagram of a gel agglomerated polished marble using konjac gum as a gelling agent in Example 3 of the present invention.
  • Fig. 7 is the photo of the gel agglomeration using sodium carboxymethyl cellulose as the gelling agent in Example 4 of the present invention.
  • Fig. 8 is a microscopic morphological diagram of a gel agglomerate using sodium carboxymethyl cellulose as a gelling agent in Example 4 of the present invention.
  • Fig. 9 is an effect diagram of marble polishing using a gel block using sodium carboxymethyl cellulose as a gelling agent in Example 4 of the present invention.
  • Fig. 10 is a photograph of gel agglomeration using gellan gum as the gelling agent in Example 5 of the present invention.
  • Fig. 11 is a microscopic morphological view of gel agglomerates using gellan gum as the gelling agent in Example 5 of the present invention.
  • Fig. 12 is an effect diagram of gel agglomeration polishing marble using gellan gum as a gelling agent in Example 5 of the present invention.
  • Fig. 13 is a photograph of gel agglomeration using ⁇ -type carrageenan as the gelling agent in Example 6 of the present invention.
  • Fig. 14 is a microscopic morphological view of gel agglomerates using ⁇ -type carrageenan as the gelling agent in Example 6 of the present invention.
  • Fig. 15 is an effect diagram of marble agglomeration using ⁇ -type carrageenan as a gelling agent in Example 6 of the present invention.
  • this gelling agent is carrageenan, gellan gum, sodium carboxymethyl cellulose or konjac gum;
  • step (2) add 400 purpose carbon fiber in the material of step (1) gained and mix evenly;
  • the carbon fiber content is selected to be 10wt%, 20wt%, 30wt%, and 40wt%, respectively.
  • Figure 3 shows the gel agglomeration diagram prepared with different carbon fiber contents. It can be seen from the figure that when the carbon fiber content is 10wt% and 20wt%, The degree of agglomeration deformation is relatively large, and the degree of deformation is small at 30wt% and 40wt%.
  • Carbon fiber content (wt%) Shore Hardness (Ha) Volume shrinkage (wt%) Compressive strength (MPa) 0 50 89.9 11.5 10wt% 65 76.1 20.3 20wt% 70 68.4 31.2 30wt% 85 50.2 40.1 40wt% 85 49.8 40.4
  • the gel agglomerate can be obtained, as shown in Figure 7, and its microscopic appearance is shown in Figure 8, the prepared gel block has elasticity, good hydrophobicity and a porous structure, and can withstand a certain pressure.
  • the effect in the polishing experiment is remarkable.
  • the polished marble effect is shown in Figure 9. After polishing, the surface roughness of the marble is 27.552nm, and the gloss value is 90.
  • the standard gloss value of this kind of marble factory is about 80.
  • the invention discloses a preparation method of a flexible sol-gel polishing block, which comprises the following steps: (1) put the gel agent and W20 diamond abrasive into deionized water and stir evenly; (2) the obtained in step (1) Add 400-mesh carbon fiber to the material and mix evenly; (3) slowly inject the material obtained in the step (2) into the mold for curing to obtain a cured gel; (4) dry the above-mentioned cured gel to obtain the flexible sol-gel Glue polished block.
  • the present invention prepares the sol-gel matrix, a specific proportion of carbon fibers is added, so that the prepared flexible sol-gel polishing block has a porous structure, which improves the polishing effect; the flexible sol-gel polishing block prepared by the present invention no longer Only one layer of coating on the surface, but the entire substrate can be used for polishing, which improves the service life of the polishing tool and has industrial applicability.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Ceramic Engineering (AREA)
  • Structural Engineering (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
  • Jellies, Jams, And Syrups (AREA)

Abstract

本发明公开了一种柔性溶胶凝胶抛光块体的制备方法包括，如下步骤：(1)将凝胶剂和W20金刚石磨料放入去离子水中搅拌均匀；(2)在步骤(1)所得的物料中加入400目的碳纤维混合均匀；(3)所述步骤(2)所得的物料缓慢注入模具内进行固化，获得固化凝胶；(4)将上述固化凝胶进行干燥，得到所述柔性溶胶凝胶抛光块体。本发明在制备溶胶凝胶基体时，加入了特定比例的碳纤维，使制备好的柔性溶胶凝胶抛光块体具有多孔结构，提高了抛光效果；本发明制备的柔性溶胶凝胶抛光块体不再只是表面一层涂覆，而是整个基体都可用于抛光，提高了抛光工具的使用寿命。

Description

一种柔性溶胶凝胶抛光块体的制备方法 技术领域
本发明属于硬质材料精密加工技术领域，具体涉及一种柔性溶胶凝胶抛光块体的制备方法。
背景技术
在传统的高精密加工领域，游离磨料加工与固结磨料加工是主要的两种方式。游离磨料加工很难同时获得高的加工效率和很好的加工质量，且这种加工方式废弃的抛光液会严重污染环境；而采用固结磨料加工方式，虽然可以提高加工效率，但是磨料在结合剂中很难均匀分布，磨具加工寿命短，且工件容易产生硬损伤。
针对游离磨料抛光和固结磨料抛光所出现的问题，同时为了解决超细磨料的团聚难题，现有技术提出了半固结磨料抛光方法，也就是利用溶胶凝胶原理制备磨抛工具进行加工。不同于化学机械抛光，这种半固结磨料抛光是将生物高分子材料与纤维基体复合进行抛光，此种抛光方式不仅具有绿色环保的特点，还能够提高加工精度，所以半固结磨料抛光在未来半导体与石材抛光领域具有巨大优势与前景。
以往，在半固结磨料抛光中所使用的溶胶凝胶抛光工具的研究中，一般是将凝胶涂覆在纤维垫或者无纺布表面，经固化干燥后用于抛光，这样获得的溶胶凝胶抛光工具虽然抛光效果显著，但使用过程中，由于只是表面涂覆了一层凝胶，所以工具的使用寿命较短，不能满足连续长时间加工的需求。此外在绿色环保理念的推动下，无水加工的需求越来越高，现有的溶胶凝胶抛光工具在无水加工中容易损坏。进一步的，为了进一步提高抛光精度并满足抛光工具产业化的需求，迫切的需要一种新型的溶胶凝胶抛光工具的制备方法。
发明内容
本发明的目的在于克服现有技术缺陷，提供一种柔性溶胶凝胶抛光块体的制备方法。
本发明的技术方案如下：
一种柔性溶胶凝胶抛光块体的制备方法，其特征在于：包括如下步骤：
(1)将凝胶剂和硬质磨料放入去离子水中搅拌均匀，该凝胶剂为λ型卡拉胶、结冷胶、羧甲基纤维素钠或魔芋胶；
(2)在步骤(1)所得的物料中加入400目的碳纤维混合均匀；
(3)所述步骤(2)所得的物料缓慢注入模具内进行固化，获得固化凝胶；
(4)将上述固化凝胶进行干燥，得到所述柔性溶胶凝胶抛光块体；
所述柔性溶胶凝胶抛光块体中，W20金刚石磨料的含量为9-11wt％，凝胶剂的含量为2.9-3.1wt％，碳纤维的含量为30-40wt％。
在本发明的一个优选实施方案中，所述凝胶剂为λ型卡拉胶，所述固化为浸泡于KCl溶液中。
在本发明的一个优选实施方案中，所述凝胶剂为魔芋胶，所述固化为浸泡于CaCl 2溶液中。
在本发明的一个优选实施方案中，所述凝胶剂为羧甲基纤维素钠，所述固化为浸泡于Al 2(SO 4) 3溶液中。
在本发明的一个优选实施方案中，所述凝胶剂为结冷胶，所述固化为浸泡于KCl溶液中。
在本发明的一个优选实施方案中，所述柔性溶胶凝胶抛光块体中，凝胶剂的含量为3wt％，凝胶骨架的含量为30wt％。
本发明的有益效果是：
1、本发明在制备柔性溶胶凝胶抛光块体时，加入了特定比例的碳纤维，使制备好的柔性溶胶凝胶抛光块体具有多孔结构，提高了抛光工具的加工效果
2、本发明制备的柔性溶胶凝胶抛光块体不再只是表面一层涂覆，而是整个基体都可用于抛光，提高了抛光工具的使用寿命。
附图说明
图1为本发明实施例1中不同凝胶剂含量的凝胶结块的照片。
图2为本发明实施例1中不同凝胶剂含量的凝胶结块的特性对比图。
图3为本发明实施例2中不同碳纤维含量的凝胶结块照片。
图4为本发明实施例3中以魔芋胶为凝胶剂的凝胶结块照片。
图5为本发明实施例3中以魔芋胶为凝胶剂的凝胶结块微观形貌图。
图6为本发明实施例3中使用以魔芋胶为凝胶剂的凝胶结块抛光大理石效果图。
图7为本发明实施例4中以羧甲基纤维素钠为凝胶剂的凝胶结块的照片。
图8为本发明实施例4中以羧甲基纤维素钠为凝胶剂的凝胶结块的微观形貌图。
图9为本发明实施例4中使用以羧甲基纤维素钠为凝胶剂的凝胶块体抛光大理石效果图。
图10为本发明实施例5中以结冷胶为凝胶剂的凝胶结块的照片。
图11为本发明实施例5中以结冷胶为凝胶剂的凝胶结块的微观形貌图。
图12为本发明实施例5中使用以结冷胶为凝胶剂的凝胶结块抛光大理石效果图。
图13为本发明实施例6中以λ型卡拉胶为凝胶剂的凝胶结块的照片。
图14为本发明实施例6中以λ型卡拉胶为凝胶剂的凝胶结块的微观形貌图。
图15为本发明实施例6中使用以λ型卡拉胶为凝胶剂的凝胶结块抛光大理石效果图。
具体实施方式
以下通过具体实施方式结合附图对本发明的技术方案进行进一步的说明和描述。
下述实施例中的凝胶结块的制备方法均采用如下步骤：
(1)将凝胶剂和W20金刚石磨料(除实施例1至2以外)放入去离子水中搅拌均匀，该凝胶剂为卡拉胶、结冷胶、羧甲基纤维素钠或魔芋胶；
(2)在步骤(1)所得的物料中加入400目的碳纤维混合均匀；
(3)所述步骤(2)所得的物料缓慢注入模具内进行固化，获得固化凝胶；
(4)将上述固化凝胶进行干燥，得到凝胶抛光。
实施例1
选取λ型卡拉胶作为研究对象，控制碳纤维含量为30wt％制备凝胶结块(具体制备方法参考实施例6)，研究不同凝胶含量对制备凝胶结块的影响。如图1所示，添加凝胶含量分别为2wt％、3wt％以及4wt％时所制备的凝胶结块，由图可知，当凝胶含量为2wt％与4wt％时，凝胶结块变形收缩严重，在凝胶含量为3wt％时形状完整。如图2所示为不同凝胶含量的体积收缩率以及邵氏硬度值，可以发现在凝胶含量为 2wt％时，体积收缩率较大，在3wt％以及4wt％时体积收缩率变化较小，硬度随着凝胶含量的变化较小。因此综上可得，在凝胶含量为3wt％时制备的凝胶结块的性能最好。
实施例2
选取λ型卡拉胶为凝胶剂，碳纤维为凝胶骨架，凝胶剂含量为3wt％，研究添加不同含量的碳纤维对制备凝胶结块(具体制备方法参考实施例6)的影响，根据已有经验，分别选取碳纤维含量为10wt％、20wt％、30wt％、40wt％，如图3所示为不同含量碳纤维制备的凝胶结块图，由图可知，碳纤维含量在10wt％以及20wt％时结块变形程度较大，在30wt％以及40wt％时变形程度较小。如表1所示为不同碳纤维含量的凝胶结块的性能，其中随着碳纤维含量的增加，性能逐渐增强，在30wt％与40wt％时基本保持稳定，因此从经济的角度来讲，选取碳纤维含量为30wt％时较为合适。
表1添加不同碳纤维含量的凝胶块体的性能
碳纤维含量(wt％) 邵氏硬度(Ha) 体积收缩率(wt％) 抗压强度(MPa)
0 50 89.9 11.5
10wt％ 65 76.1 20.3
20wt％ 70 68.4 31.2
30wt％ 85 50.2 40.1
40wt％ 85 49.8 40.4
实施例3
室温下选取魔芋胶3g、碳纤维30g和W20金刚石磨料10g加入到100mL去离子水中搅拌，搅拌时间为8h；配制0.5mol/L的CaCl 2溶液，将搅拌均匀的混合溶液缓慢加入到圆形的模具中并放入到配制好的CaCl 2溶液中，常温下静置3h；最后将固化好的凝胶结块在常温常压下干燥72h，所得的凝胶结块如图4所示，其微观形貌如图5所示，抛光后大理石的表面形貌如图6所示，其中抛光压力为15N，抛光转速为100r/min，抛光时间为14min，以下实施例加工参数相同，大理石表面粗糙度在35nm左右，表面光泽度值为88左右。
实施例4
室温下选取碳纤维含量为30wt％，将6g的羧甲基纤维素钠与20g W20金刚石磨料加入到200mL去离子水中搅拌均匀，再将60g碳纤维加入到此混合物中充分混合搅拌，搅拌时间为8h；配制0.5mol/L的Al 2(SO 4) 3溶液，将搅拌均匀的混合溶液缓慢加入到圆形的模具中并放入到配制好的Al 2(SO 4) 3溶液中，常温下静置3h；最后将羧甲基纤维素钠凝胶取出放入冷冻干燥机中，冷冻温度低于-40℃，冷冻时间为8h，设置干燥时间为10h，真空压力小于15Pa，环境温度为15℃，即可得到凝胶结块，如图7所示，其微观形貌图如图8所示，制备得到的凝胶块体具有弹性，疏水性好且具有多孔结构，能承受一定的压强，在抛光实验中效果显著，抛光大理石效果如图9所示，抛光后大理石表面粗糙度在27.552nm，光泽度值为90，此种大理石工厂出厂标准光泽度值为80左右。
实施例5
室温下，将6g的结冷胶与20gW20金刚石磨料加入到200mL去离子水中搅拌均匀，再将60g碳纤维加入其中充分混合搅拌，搅拌时间为7h；配制0.5mol/L的KCl溶液，将搅拌均匀的混合溶液缓慢加入到圆形的模具中并放入到配制好的KCl溶液中，常温下静置5h；最后将结冷胶凝胶取出微波干燥，干燥时间为2h，即可得到结冷胶凝胶结块，所得结块如图10所示，微观形貌如图11所示，制备得到的凝胶块体具有弹性，疏水性好且具有多孔结构，能承受一定的压强，在抛光实验中效果显著抛光大理石效果如图12所示，抛光后大理石粗糙度在30.378nm，测得的平均光泽度值为92，此种大理石工厂出厂标准光泽度值为80左右。
实施例6
常温常压下选取6gλ型卡拉胶与20g W20金刚石磨料加入到200mL去离子水中搅拌均匀，再将60g碳纤维加入其中充分混合搅拌，搅拌时间为7h，配制0.5mol/L的KCl溶液，将搅拌均匀的混合溶液缓慢加入到圆形的模具中并放入到配制好的KCl溶液中，常温下静置3h；最后将卡拉胶凝胶取出在50℃烘箱里热风干燥，干燥时间 为2h，即可得到卡拉胶凝胶结块，所得结块如图13所示，微观形貌如图14所示，制备得到的凝胶块体抛光实验中效果显著，抛光大理石效果如图15所示，抛光后大理石粗糙度在30.378nm，测得的平均光泽度值为92，此种大理石工厂出厂标准光泽度值为80左右。
以上所述，仅为本发明的较佳实施例而已，故不能依此限定本发明实施的范围，即依本发明专利范围及说明书内容所作的等效变化与修饰，皆应仍属本发明涵盖的范围内。
工业实用性
本发明公开了一种柔性溶胶凝胶抛光块体的制备方法包括，如下步骤：(1)将凝胶剂和W20金刚石磨料放入去离子水中搅拌均匀；(2)在步骤(1)所得的物料中加入400目的碳纤维混合均匀；(3)所述步骤(2)所得的物料缓慢注入模具内进行固化，获得固化凝胶；(4)将上述固化凝胶进行干燥，得到所述柔性溶胶凝胶抛光块体。本发明在制备溶胶凝胶基体时，加入了特定比例的碳纤维，使制备好的柔性溶胶凝胶抛光块体具有多孔结构，提高了抛光效果；本发明制备的柔性溶胶凝胶抛光块体不再只是表面一层涂覆，而是整个基体都可用于抛光，提高了抛光工具的使用寿命,具有工业实用性。

Claims (6)

  1. 一种柔性溶胶凝胶抛光块体的制备方法，其特征在于：包括如下步骤：
    (1)将凝胶剂和W20金刚石磨料放入去离子水中搅拌均匀，该凝胶剂为λ型卡拉胶、结冷胶、羧甲基纤维素钠或魔芋胶；
    (2)在步骤(1)所得的物料中加入400目的碳纤维混合均匀；
    (3)所述步骤(2)所得的物料缓慢注入模具内进行固化，获得固化凝胶；
    (4)将上述固化凝胶进行干燥，得到所述柔性溶胶凝胶抛光块体；
    所述柔性溶胶凝胶抛光块体中，W20金刚石磨料的含量为9-11wt％，凝胶剂的含量为2.9-3.1wt％，凝胶骨架的含量为30-40wt％。
  2. 如权利要求1所述的制备方法，其特征在于：所述凝胶剂为λ型卡拉胶，所述固化为浸泡于KCl溶液中。
  3. 如权利要求1所述的制备方法，其特征在于：所述凝胶剂为魔芋胶，所述固化为浸泡于CaCl 2溶液中。
  4. 如权利要求1所述的制备方法，其特征在于：所述凝胶剂为羧甲基纤维素钠，所述固化为浸泡于Al 2(SO 4) 3溶液中。
  5. 如权利要求1所述的制备方法，其特征在于：所述凝胶剂为结冷胶，所述固化为浸泡于KCl溶液中。
  6. 如权利要求1至5中任一权利要求所述的制备方法，其特征在于：所述柔性溶胶凝胶抛光块体中，凝胶剂的含量为3wt％，碳纤维的含量为30wt％。
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