CN107841116A - A kind of wear-resisting modified polylactic acid material and preparation method thereof - Google Patents

A kind of wear-resisting modified polylactic acid material and preparation method thereof Download PDF

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CN107841116A
CN107841116A CN201711239062.8A CN201711239062A CN107841116A CN 107841116 A CN107841116 A CN 107841116A CN 201711239062 A CN201711239062 A CN 201711239062A CN 107841116 A CN107841116 A CN 107841116A
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parts
nano
polylactic acid
wear
pla
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舒春柳
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Sichuan Lizhi Jiuchuang Intellectual Property Operations Ltd
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Sichuan Lizhi Jiuchuang Intellectual Property Operations Ltd
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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J3/00—Processes of treating or compounding macromolecular substances
    • C08J3/28—Treatment by wave energy or particle radiation
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L67/00—Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Compositions of derivatives of such polymers
    • C08L67/04—Polyesters derived from hydroxycarboxylic acids, e.g. lactones
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2367/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
    • C08J2367/04—Polyesters derived from hydroxy carboxylic acids, e.g. lactones
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2427/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers
    • C08J2427/02—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment
    • C08J2427/12—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment containing fluorine atoms
    • C08J2427/18—Homopolymers or copolymers of tetrafluoroethylene
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K2201/00—Specific properties of additives
    • C08K2201/011—Nanostructured additives
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2312/00—Crosslinking

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  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

The invention discloses a kind of wear-resisting modified polylactic acid material and preparation method thereof, including following parts by weight raw material to be prepared：10 15 parts of nano-ceramic particle, 5 10 parts of modifying agent, 20 30 parts of polytetrafluoroethylene (PTFE), 55 75 parts of PLA, 0.3 0.8 parts of coupling agent, 35 parts of crosslinking agent；The present invention carries out the nano-ceramic particle Jing Guo specific aim modification with PLA compound, and nano-ceramic particle is set to be dispersed in PLA system, obtained wear-resisting modified polylactic acid material anti-wear performance is excellent, is advantageous to application of the PLA in more areas.

Description

A kind of wear-resisting modified polylactic acid material and preparation method thereof
Technical field
The present invention relates to material modified field, and in particular to a kind of wear-resisting modified polylactic acid material and preparation method thereof.
Background technology
PLA（PLA）It is a kind of new biodegradation material, uses reproducible plant resources（Such as corn）Carried The starch material gone out is made.Lactic acid is made via fermentation process in starch material, then is converted into PLA by chemical synthesis.It has There is good biodegradability, can be degradable by microorganism in nature after use, carbon dioxide and water are ultimately generated, no Environment is polluted, this is highly beneficial to environmental protection, is generally acknowledged environment-friendly material.The mechanical performance and physics of poly-lactic acid material Functional, compatibility is good, and many advantages, such as breathing freely, the every field in life and production has extensive application.
With the continuous improvement that people are required material wear-resistant performance, the PLA without wear-resisting modification has been difficult to meet need Ask, thus, wear-resisting modification is carried out to PLA and necessitated.It is various to the wear-resisting modification processing method species of PLA now, Modified effect is also fine, especially with the appearance and application of nano material, the wearability increase significant effect of PLA, makes to gather Lactic acid can largely use in more areas, but there is also deficiency.Although nano material has, wear-resisting enhancing effect is good, and addition is small The advantages of, but there is also difficulties in dispersion, the defects of cost is high.In wear-resisting modifying process is carried out, the scattered uneven meeting of nano material Its abrasion resistant effect is influenceed, obtained material modified wearability is relatively low, and material modified production and application are adversely affected.
The content of the invention
The defects of it is an object of the invention to overcome existing modified polylactic acid material wearability poor, there is provided a kind of wear-resisting poly- Lactic modified material and preparation method thereof；The present invention carries out the nano-ceramic particle Jing Guo specific aim modification and PLA It is compound, and nano-ceramic particle is dispersed in PLA system, obtained wear-resisting modified polylactic acid material anti-wear performance It is excellent, be advantageous to application of the PLA in more areas.
In order to realize foregoing invention purpose, the invention provides a kind of wear-resisting modified polylactic acid material, including following weight Part raw material are prepared：The nano-ceramic particle of 10-15 parts, the modifying agent of 5-10 parts, the polytetrafluoroethylene (PTFE), 55- of 20-30 parts 75 parts of PLA, the coupling agent of 0.3-0.8 parts, the crosslinking agent of 3-5 parts.
A kind of above-mentioned wear-resisting modified polylactic acid material, resin material wearability can be increased according to nano-ceramic particle and crosslinking General principle, not only by targetedly screening modifying agent, coupling agent and the species of crosslinking agent, to improve nano-ceramic particle Compatibility between PLA, and make nano-ceramic particle disperse evenly, to make nano-ceramic particle to poly- in PLA The wearability humidification of lactic acid is more preferable, also modified modified polylactic acid material is existed by controlling the degree of polymerization of PLA Reach optimum balance relation between wearability and processability, so as to make obtained modified polylactic acid material with excellent wear-resisting Under conditions of property, it may have excellent processability, it is applied in more areas.
A kind of above-mentioned wear-resisting modified polylactic acid material, wherein, described nano-ceramic particle particle diameter is 10-80nm；Nanometer Ceramic particle particle diameter is smaller, and dispersiveness is poorer, and nano-ceramic particle particle diameter is bigger, poorer to the wear-resisting humidification of PLA； Preferably, described nano-ceramic particle particle diameter is 30-50nm；Most preferably, described nano-ceramic particle particle diameter is 40nm.
Wherein, it is preferred that described nano-ceramic particle is nano silicon oxide ceramics, nano-si 3 n 4 ceramicses, nano-sized carbon One or more in SiClx ceramics；Preferable nano-ceramic particle is in the presence of plurality of raw materials, the compatibility with PLA More preferably, it is optimal to the wearability humidification of modified polylactic acid material.
A kind of above-mentioned wear-resisting modified polylactic acid material, wherein, described modifying agent is methyl silicate and three triacetins The mixture of ester composition；Described modifying agent can improve the compatibility of nano-ceramic particle and PLA, and and can is made pottery in nanometer Porcelain particle surface forms polar group, beneficial to scattered；Preferably, methyl silicate and triacetyl glycerine in described modifying agent The ratio between the amount of material be 1 ︰ 1.
A kind of above-mentioned wear-resisting modified polylactic acid material, wherein, the degree of polymerization of polytetrafluoroethylene (PTFE) is bigger, then wear-resisting poly- after being crosslinked The wearability of lactic modified material is poorer, and processability is better, and the polymer of polytetrafluoroethylene (PTFE) is smaller, then polylactic acid modified after being crosslinked The wearability of material is better, and processability is poorer, therefore, selects the rational polytetrafluoroethylene (PTFE) degree of polymerization, is to balance wearability and add The important means of work.The degree of polymerization of described polytetrafluoroethylene (PTFE) is 100-300；Preferably, described polytetrafluoroethylene (PTFE) is poly- Right is 150-230；Optimal, the degree of polymerization of described polytetrafluoroethylene (PTFE) is 200；By preferred, what is obtained is polylactic acid modified Material both has excellent wearability, it may have preferable processability, is adapted to.
Wherein, described polymerisation degree of poly-lactic acid is 600-1200；Preferably, the degree of polymerization of the PLA is 800- 1100；Most preferably, the degree of polymerization of described PLA is 1000；By preferred, obtained modified polylactic acid material both had Excellent wearability, it may have preferable processability.
A kind of above-mentioned wear-resisting modified polylactic acid material, wherein, described coupling agent is coupled for methacryloxypropyl silane Agent；Methacryloxypropyl silane can increase the compatibility between nano-ceramic particle and PLA and modifying agent, improve resistance to Grind the performance of modified polylactic acid material.
Wherein, described crosslinking agent is methacrylic acid, and the crosslinking agent can be by the polymer former material of two kinds of different polymerization degrees The appropriate crosslinking of material, improve the wearability of modified polylactic acid material.
A kind of above-mentioned wear-resisting modified polylactic acid material, wherein, its raw material also include dispersant, plasticizer, antistatic additive, One or more auxiliary agents in coloring agent, brightener；Above-mentioned auxiliary agent can improve the processability of wear-resisting modified polylactic acid material, increase Its feature etc. is added to act on, so as to increase its applicability.
In order to realize foregoing invention purpose, further, present invention also offers a kind of wear-resisting modified polylactic acid material Preparation method, comprise the following steps：
（1）Nano-ceramic particle is handled with coupling agent；
（2）Nano-ceramic particle Jing Guo coupling agent treatment is subjected to cladding processing with modifying agent；
（3）Combined Processing is carried out after nano-ceramic particle after cladding is well mixed with PLA in the electric field, is mixed Material；
（4）Combined Processing is being carried out after compound is well mixed with polytetrafluoroethylene (PTFE), crosslinking agent, is being obtained wear-resisting polylactic acid modified Material.
A kind of preparation method of wear-resisting modified polylactic acid material, is first carried out at coupling with coupling agent to nano-ceramic particle Reason, increase nano-ceramic particle and modifying agent, the compatibility of PLA；Place is modified to nano-ceramic particle with modifying agent again Reason, and form polar group on its surface；Finally make the polarity in nano-ceramic particle surface and polylactic acid chain using external electric field Group polarizes, powered, by repelling each other between electric charge or attracting principle, while making nano-ceramic particle dispersed, also can It is bonded with the polar group in polylactic acid chain, so that the wear-resisting enhancing effect of nano-ceramic particle obtains maximum body It is existing, so as to get polydactyl acid wearability significantly improve；The preparation method is simple and reliable, is suitable for wear-resisting polylactic acid modified Extensive, the industrialized production of material.
A kind of preparation method of above-mentioned wear-resisting modified polylactic acid material, wherein, it is preferred that step 1 carries out coupling processing mistake Cheng Zhongke uses ultrasonic assistant；Shaken by the high speed of ultrasonic wave, make nano-ceramic particle dispersiveness more preferable, and to coupling at Reason has facilitation.
A kind of preparation method of above-mentioned wear-resisting modified polylactic acid material, wherein, the electric field energy described in step 3 produces to group Raw polarization, makes group powered, so as to promote the scattered and bonded effect of nano-ceramic particle, improves polydactyl acid Wearability.
Preferably, described electric-field intensity is 1.2-2.5kv/m；Electric-field intensity is too small, and polarization effect is weak, to nano ceramics The dispersion effect of particle is poor；Electric-field intensity is excessive, and polarization effect is too strong, and intermolecular force is too big, and strand produces orientation and moved It is dynamic, arrangement and the bonded performance for having an impact, wear-resisting modified polylactic acid material may being reduced to strand；Most preferably, institute The electric-field intensity stated is 1.5-2.0kv/m.
Wherein, it is preferred that described electric field is the constant parallel electric field of direction of an electric field；The constant parallel electric field of direction of an electric field Best to the polarization effect of polar group, group intermolecular forces are stable, and the scattered and bonded promotion to nano-ceramic particle is made Use best results.
A kind of preparation method of above-mentioned wear-resisting modified polylactic acid material, wherein, step 3, the Combined Processing described in 4 are preferred Blending extrusion technique.
Compared with prior art, beneficial effects of the present invention：
1st, the wear-resisting modified polylactic acid material of the present invention targetedly screens the species of modifying agent, coupling agent and crosslinking agent, makes nanometer Compatibility between ceramic particle and PLA is more preferable, and the dispersiveness in PLA is more preferable, and nano-ceramic particle is to PLA Wearability humidification it is more preferable.
2nd, the wear-resisting modified polylactic acid material of the present invention makes modification by controlling the degree of polymerization of PLA and polytetrafluoroethylene (PTFE) Modified polylactic acid material afterwards reaches optimum balance relation between wearability and processability, so as to get modified polylactic acid material Under conditions of with excellent wearability, it may have excellent processability.
3rd, the preparation method of the wear-resisting modified polylactic acid material of the present invention, using the polarization of external electric field, can promote nanometer Ceramic particle is scattered and bonded in PLA system, and the wear-resisting enhancing effect of nano-ceramic particle is more preferable, obtained poly- breast The material modified wearability of acid is higher.
4th, the preparation method of the wear-resisting modified polylactic acid material of the present invention is simple, reliable, is adapted to wear-resisting modified polylactic acid material Extensive, industrialized production.
Embodiment
With reference to test example and embodiment, the present invention is described in further detail.But this should not be understood Following embodiment is only limitted to for the scope of the above-mentioned theme of the present invention, it is all that this is belonged to based on the technology that present invention is realized The scope of invention.
Embodiment 1
（1）12 parts of nano-si 3 n 4 ceramicses particle is handled with 0.5 part of methacryloxypropyl silane；
（2）By the nano-si 3 n 4 ceramicses particle Jing Guo coupling agent treatment 3.5 parts of methyl silicate and 3.5 parts of three acetic acid Glyceride carries out cladding processing；
（3）In electricity after nano-si 3 n 4 ceramicses particle after cladding is well mixed with the PLA that 65 parts of the degree of polymerization is 900 Field intensity is to be extruded in the constant parallel electric field of 2.0kv/m direction of an electric field, obtains compound；
（4）The compound that step 3 obtains is mixed with polytetrafluoroethylene (PTFE) that 25 parts of the degree of polymerization is 200,4 parts of methacrylic acids Extruded after even, obtain wear-resisting modified polylactic acid material.
Embodiment 2
（1）10 parts of nano-si 3 n 4 ceramicses particle is handled with 0.3 part of methacryloxypropyl silane；
（2）By the nano-si 3 n 4 ceramicses particle Jing Guo coupling agent treatment 2.5 parts of methyl silicate and 2.5 parts of three acetic acid Glyceride carries out cladding processing；
（3）After nano-si 3 n 4 ceramicses particle after cladding is well mixed with the PLA that 55 parts of the degree of polymerization is 1200 Electric-field intensity is to be extruded in 2.5kv/m electric field, obtains compound；
（4）The compound that step 3 obtains is mixed with polytetrafluoroethylene (PTFE) that 30 parts of the degree of polymerization is 300,3 parts of methacrylic acids Extruded after even, obtain wear-resisting modified polylactic acid material.
Embodiment 3
（1）15 parts of nano-si 3 n 4 ceramicses particle is handled with 0.8 part of methacryloxypropyl silane；
（2）By the nano-si 3 n 4 ceramicses particle Jing Guo coupling agent treatment 5 parts of methyl silicate and 5 parts of three triacetins Ester carries out cladding processing；
（3）After nano-si 3 n 4 ceramicses particle after cladding is well mixed with the PLA that 75 parts of the degree of polymerization is 600 Electric-field intensity is to be extruded in the constant parallel electric field of 1.5kv/m direction of an electric field, obtains compound；
（4）The compound that step 3 obtains is mixed with polytetrafluoroethylene (PTFE) that 20 parts of the degree of polymerization is 100,5 parts of methacrylic acids Extruded after even, obtain wear-resisting modified polylactic acid material.
Comparative example 1
（1）12 parts of nano-si 3 n 4 ceramicses particle is handled with 0.5 part of methacryloxypropyl silane；
（2）It is 900 by the nano-si 3 n 4 ceramicses particle Jing Guo coupling agent treatment and 8 parts of dispersant, 65 parts of the degree of polymerization Extruded, mixed in the constant parallel electric field of the direction of an electric field that electric-field intensity is 2.0kv/m after PLA is well mixed Close material；
（3）The compound that step 2 obtains is mixed with polytetrafluoroethylene (PTFE) that 25 parts of the degree of polymerization is 200,4 parts of methacrylic acids Extruded after even, obtain modified polylactic acid material.
Comparative example 2
（1）12 parts of nano-si 3 n 4 ceramicses particle is handled with 0.5 part of methacryloxypropyl silane；
（2）By the nano-si 3 n 4 ceramicses particle Jing Guo coupling agent treatment 3.5 parts of methyl silicate and 3.5 parts of three acetic acid Glyceride carries out cladding processing；
（3）It is by PLA that the nano-si 3 n 4 ceramicses particle after cladding is 900 with 65 parts of the degree of polymerization, 25 parts of the degree of polymerization Extruded after 200 polytetrafluoroethylene (PTFE), 4 parts of methacrylic acids are well mixed, obtain modified polylactic acid material.
Comparative example 3
（1）12 parts of nano-si 3 n 4 ceramicses particle is handled with 0.5 part of methacryloxypropyl silane；
（2）Nano-si 3 n 4 ceramicses particle Jing Guo coupling agent treatment is sweet with 3.5 parts of polyaerylic acid and 3.5 parts of three acetic acid Grease carries out cladding processing；
（3）In electricity after nano-si 3 n 4 ceramicses particle after cladding is well mixed with the PLA that 65 parts of the degree of polymerization is 900 Field intensity is to be extruded in the constant parallel electric field of 2.0kv/m direction of an electric field, obtains compound；
（4）The compound that step 3 obtains is mixed with polytetrafluoroethylene (PTFE) that 25 parts of the degree of polymerization is 200,4 parts of methacrylic acids Extruded after even, obtain modified polylactic acid material.
Comparative example 4
（1）12 parts of nano-si 3 n 4 ceramicses particle is handled with 0.5 part of methacryloxypropyl silane；
（2）By the nano-si 3 n 4 ceramicses particle Jing Guo coupling agent treatment 3.5 parts of methyl silicate and 3.5 parts of three acetic acid Glyceride carries out cladding processing；
（3）By the polytetrafluoroethylene (PTFE) of the nano-si 3 n 4 ceramicses particle after cladding and 25 parts of the degree of polymerization for 200,4 parts of methyl-props Constant flat of direction of an electric field for being 2.0kv/m in electric-field intensity after PLA that olefin(e) acid, 65 parts of the degree of polymerization are 900 is well mixed Extruded in row electric field, obtain modified polylactic acid material.
Comparative example 5
（1）12 parts of nano-si 3 n 4 ceramicses particle is handled with 0.5 part of methacryloxypropyl silane；
（2）By the nano-si 3 n 4 ceramicses particle Jing Guo coupling agent treatment 3.5 parts of methyl silicate and 3.5 parts of three acetic acid Glyceride carries out cladding processing；
（3）In electricity after nano-si 3 n 4 ceramicses particle after cladding is well mixed with the PLA that 65 parts of the degree of polymerization is 500 Field intensity is to be extruded in the constant parallel electric field of 2.0kv/m direction of an electric field, obtains compound；
（4）The compound that step 3 obtains is mixed with polytetrafluoroethylene (PTFE) that 25 parts of the degree of polymerization is 80,4 parts of methacrylic acids Extruded after even, obtain modified polylactic acid material.
By the modified polylactic acid material in above-described embodiment 1-3 and comparative example 1-5, performance detection is carried out（Anti-wear performance is surveyed Examination：By GB3960-1983 standard testings, experiment power is 200N, rotating speed 200r/min, wearing- in period 2h.）, record data It is as follows：
Performance Wear extent（g） Processability
Embodiment 1 0.122 ++++
Embodiment 2 0.125 ++++
Embodiment 3 0.124 ++++
Comparative example 1 0.183 ++++
Comparative example 2 0.178 ++++
Comparative example 3 0.162 ++++
Comparative example 4 0.148 ++++
Comparative example 5 0.125 ++
Note："+" is more, illustrates that performance is better.
Above-mentioned analysis of experimental data is understood, the modified polylactic acid material of the present invention being prepared in embodiment 1-3, nanometer Ceramic particle is uniformly dispersed, and good with the compatibility of PLA, modified polylactic acid material wearability is good, and processability is good；And comparative example 1 In, modifying agent is not used processing is modified to nano-ceramic particle, although adding dispersant, nano-ceramic particle disperses Effect is poor, and the poor compatibility with PLA, the wearability of modified polylactic acid material significantly reduces；In comparative example 2 not in the electric field Combined Processing is carried out, nano-ceramic particle dispersion effect is poor, and the wearability of modified polylactic acid material significantly reduces；In comparative example 3 Modifying agent is not the application defined, and nano-ceramic particle dispersion effect is poor, and the wearability of modified polylactic acid material significantly drops It is low；Cross-linking reaction is equally carried out in the electric field in comparative example 4, and electric field has a negative impact to cross-linking reaction, so as to get poly- breast The material modified wearability of acid reduces；The PLA and the polytetrafluoroethylene (PTFE) degree of polymerization used in comparative example 5 is too small, although after compound Wearability increased, but its processability significantly reduces, and be unfavorable for the application of wear-resisting modified polylactic acid material.

Claims (10)

1. a kind of wear-resisting modified polylactic acid material, it is characterised in that be prepared including following parts by weight raw material：10-15 parts Nano-ceramic particle, the modifying agent of 5-10 parts, the polytetrafluoroethylene (PTFE) of 20-30 parts, the PLA of 55-75 parts, 0.3-0.8 parts Coupling agent, the crosslinking agent of 3-5 parts；The modifying agent is the mixture of methyl silicate and triacetyl glycerine composition；The idol Connection agent is methacryloxypropyl silane coupling agent, and the crosslinking agent is methacrylic acid；The degree of polymerization of the polytetrafluoroethylene (PTFE) For 100-300；The polymerisation degree of poly-lactic acid is 600-1200.
It is 2. according to claim 1 material modified, it is characterised in that methyl silicate and three acetic acid are sweet in the modifying agent The ratio between amount of material of grease is 1 ︰ 1.
It is 3. according to claim 1 material modified, it is characterised in that the degree of polymerization of the polytetrafluoroethylene (PTFE) is 150-230.
It is 4. according to claim 3 material modified, it is characterised in that the degree of polymerization of the polytetrafluoroethylene (PTFE) is 200.
It is 5. according to claim 1 material modified, it is characterised in that the polymerisation degree of poly-lactic acid is 800-1100.
It is 6. according to claim 5 material modified, it is characterised in that the polymerisation degree of poly-lactic acid is 1000.
7. a kind of material modified preparation method as described in claim 1-6, it is characterised in that comprise the following steps：
（1）Nano-ceramic particle is handled with coupling agent；
（2）Nano-ceramic particle Jing Guo coupling agent treatment is subjected to cladding processing with modifying agent；
（3）Combined Processing is carried out after nano-ceramic particle after cladding is well mixed with PLA in the electric field, is mixed Material；
（4）Combined Processing is being carried out after compound is well mixed with polytetrafluoroethylene (PTFE), crosslinking agent, is being obtained wear-resisting polylactic acid modified Material.
8. preparation method according to claim 7, it is characterised in that step（3）Middle electric-field intensity is 1.2-2.5kv/m.
9. preparation method according to claim 8, it is characterised in that step（3）Middle electric-field intensity is 1.5-2.0kv/m.
10. preparation method according to claim 7, it is characterised in that step（3）Middle electric field, which is that direction of an electric field is constant, puts down Row electric field.
CN201711239062.8A 2017-11-30 2017-11-30 A kind of wear-resisting modified polylactic acid material and preparation method thereof Withdrawn CN107841116A (en)

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Application publication date: 20180327