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CN-121992658-A - Modified starch-nano composite reinforced environment-friendly tire base cloth and preparation method thereof

CN121992658ACN 121992658 ACN121992658 ACN 121992658ACN-121992658-A

Abstract

The invention relates to the technical field of tire base cloth materials, in particular to modified starch-nano composite reinforced environment-friendly tire base cloth and a preparation method thereof, wherein the modified starch-nano composite reinforced environment-friendly tire base cloth is prepared by carrying out padding, pre-baking and hot rolling composite forming on modified starch-based composite slurry and PET fiber base materials, the modified starch-based composite slurry is prepared by compounding a modified starch matrix and modified nano fillers, and the modified starch matrix is starch substances subjected to at least one modification treatment of hydroxypropylation and crosslinking. The modified starch-nano composite reinforced environment-friendly tyre base cloth and the preparation method thereof provided by the invention effectively solve the technical problem that the environment-friendliness and performance of the existing tyre base cloth are contradictory, and have excellent use performance and outstanding ecological environment-friendly value.

Inventors

  • YANG XINGLONG
  • XIANG FENG
  • ZHEN LEI
  • LIU CHONG
  • CHEN GUIFU

Assignees

  • 常德天鼎丰非织造布有限公司

Dates

Publication Date
20260508
Application Date
20260304

Claims (10)

  1. 1. A modified starch-nano composite reinforced environment-friendly tire base cloth is characterized in that the modified starch-nano composite reinforced environment-friendly tire base cloth is prepared by carrying out padding, pre-baking and hot rolling composite forming on modified starch-based composite slurry and PET fiber base materials, wherein the modified starch-based composite slurry is prepared by compounding modified starch matrixes and modified nano fillers, the modified starch matrixes are starch substances subjected to at least one of hydroxypropylation and crosslinking, the modified nano fillers are nano inorganic fillers which are modified by coupling agents or are coated by dopamine in Tris-HCl buffer solution to form PDA coatings, the preparation process of the composite slurry adopts at least one of parallel electric fields of 1.2kv/m-1.8kv/m and ultrasonic waves of 180W-220W/40kHz, the PET fiber base materials are subjected to atmospheric pressure oxygen plasma activation treatment or are directly compounded with the composite slurry, and the power of the atmospheric pressure oxygen plasma activation treatment is 250W-350W, the treatment time is 3min-5min, and the movement speed of the base materials is 0.4m/min-0.6m/min.
  2. 2. The modified starch-nano composite reinforced environment-friendly tire base cloth according to claim 1 is characterized in that starch substances are single varieties or compounds with any proportion in corn starch, waxy corn starch, tapioca starch and potato starch, nano inorganic filler is single varieties or compounds with any proportion in silicon dioxide, montmorillonite, zinc oxide and nano cellulose, and the pH value of Tris-HCl buffer solution is 8.0-9.0, and the concentration is 0.01mol/L.
  3. 3. The modified starch-nano composite reinforced environment-friendly tire base cloth according to claim 1 is characterized in that the coupling agent is a silane coupling agent, the crosslinking agent used for crosslinking modification is at least one of sodium trimetaphosphate, adipic acid and phosphorus oxychloride, the PET fiber base material is one of PET fiber, PET/CoPET bi-component fiber, hollow PET fiber and low-gram-weight PET fiber, and the gram weight of the low-gram-weight PET fiber is 130g/m < 2 > -140g/m < 2 >.
  4. 4. The modified starch-nano composite reinforced environment-friendly tire base cloth according to claim 1, wherein a plasticizer is further added into the modified starch-based composite slurry, and the plasticizer is a single variety or a compound with any proportion of glycerol, polyethylene glycol, propylene glycol and polyvinyl alcohol.
  5. 5. A method for preparing the modified starch-nanocomposite reinforced environment-friendly tire base fabric according to any one of claims 1 to 4, comprising the steps of: (1) Preparing a modified starch substrate, namely mixing starch substances with deionized water, gelatinizing for 30-35 minutes at 90-95 ℃, adding a modifier, and carrying out hydroxypropylation or crosslinking modification reaction at 55-80 ℃ for 1.5-3 hours to obtain the modified starch substrate; (2) Preparing modified nano filler, namely performing ultrasonic dispersion treatment on the nano inorganic filler for 20 to 45 minutes at 180 to 220W and 40kHz, adding a coupling agent to perform modification reaction for 2 to 4 hours at 65 to 80 ℃ or adding dopamine to perform cladding reaction in Tris-HCl buffer solution at room temperature and pH value of 8.0 to 9.0 for 10 hours, and drying to obtain the modified nano filler; (3) Preparing composite slurry, namely uniformly mixing a modified starch substrate with a plasticizer, adding a modified nano filler, adopting a parallel electric field of 1.2-1.8 kv/m and 50Hz to treat for 25-30 minutes, and/or carrying out ultrasonic dispersion treatment of 180-220W and 40kHz, and stirring at the speed of 250-350 r/min for 60-120 minutes to obtain the modified starch-based composite slurry; (4) Compounding and forming the base material, namely compounding the PET fiber base material with the composite slurry in a padding mode by a two-roller or three-roller padding machine, controlling the rolling residual rate to be 28% -42%, orderly pre-baking for 2 minutes to 2.5 minutes at 118 ℃ to 125 ℃, hot-rolling at 158 ℃ to 175 ℃ per 0.3MPa to 0.5MPa, and naturally cooling to obtain a tire base fabric finished product.
  6. 6. The method according to claim 5, wherein in the step (2), the solid-to-liquid ratio of the dopamine coating reaction is 1:65-1:70, the drying temperature is 60-65 ℃, and the drying time is 3-4 hours.
  7. 7. The preparation method according to claim 5, wherein in the step (4), when the PET fiber base material is a low gram weight PET fiber, a multi-pass padding process is adopted, the padding surplus rate of each pass is 28%, the padding machine is a three-roll padding machine, the roller diameter is 250mm-300mm, the roller speed ratio is 1.05:1-1.1:1, and the finished product is further subjected to hot air post-treatment at 85 ℃ for 1 hour, and the water content is controlled to be below 5%.
  8. 8. The method according to claim 5, wherein in the step (4), the hot rolling is performed by a sectional hot rolling process, wherein the hot rolling is performed at 160 ℃ per 0.3MPa for 1 minute and then at 175 ℃ per 0.5MPa for 1 minute, and the hot rolling speed is 7m/min to 8m/min.
  9. 9. The method according to claim 5, wherein in the step (1), the stirring rate of the gelatinization process is 200r/min-220r/min, and the stirring rate of the modification reaction process is 150r/min-180r/min.
  10. 10. The method according to claim 5, wherein in the step (3), the modified starch substrate and the plasticizer are mixed at a stirring rate of 250r/min to 300r/min for 30 minutes.

Description

Modified starch-nano composite reinforced environment-friendly tire base cloth and preparation method thereof Technical Field The invention relates to the technical field of tire base cloth materials, in particular to modified starch-nano composite reinforced environment-friendly tire base cloth and a preparation method thereof. Background The tire base cloth is a core substrate in the fields of waterproof materials, rubber products and the like, polyester fibers become the main stream choice of the tire base cloth substrate due to excellent mechanical properties, and the composite sizing agent of the existing tire base cloth mostly adopts a petroleum-based resin system, so that the system can meet the basic use requirement, but the raw materials are not renewable, the carbon emission is higher in the production and use processes, the finished product is difficult to biodegrade, the environmental burden is easily caused, and the current environment-friendly industrial development trend is not met. In order to solve the environmental protection problem of petroleum-based systems, the industry begins to develop starch-based composite sizing agent to prepare tire base cloth, starch is taken as a natural renewable raw material, has good biodegradability and environmental protection, but has the defects of unstable molecular structure and poor water and weather resistance, and is easy to generate brittle fracture in a low-temperature environment, thus becoming a key problem for restricting the industrialized application of the starch. Meanwhile, in the existing preparation of the starch-based base fabric, the nano filler is easy to agglomerate, so that the dispersibility is poor, the stability of the slurry is insufficient, and the interfacial binding force between the starch matrix and the fiber base material as well as between the starch matrix and the nano filler is weak, so that the mechanical property and the environmental resistance of the finished product are greatly reduced, and the performance requirements of practical application are difficult to match. In addition, the processing technology of the traditional starch-based base fabric is poor in adaptability, the problem that a low-gram-weight base material is easy to damage is solved, the slurry dipping efficiency is low, the requirement of industrial high-speed production cannot be met, and the cooperative improvement of the environmental protection performance, the mechanical performance, the processing performance and the environmental resistance performance of the starch-based base fabric cannot be realized in the prior art. Disclosure of Invention The invention aims at providing a modified starch-nano composite reinforced environment-friendly tire base fabric and a preparation method thereof. The invention further aims to provide a modified starch-nanometer composite reinforced environment-friendly tire base fabric, which is prepared by carrying out padding, prebaking and hot rolling composite forming on modified starch-based composite slurry and PET fiber base materials, wherein the modified starch-based composite slurry is prepared by compounding modified starch matrixes and modified nanometer fillers, the modified starch matrixes are starch substances subjected to at least one of hydroxypropyl and crosslinking, the modified nanometer fillers are nanometer inorganic fillers modified by coupling agents or coated by dopamine in Tris-HCl buffer solution to form PDA coatings, the preparation process of the composite slurry adopts at least one of parallel electric fields of 1.2kv/m-1.8kv/m and ultrasound of 180W-220W/40kHz, the PET fiber base materials are subjected to atmospheric pressure oxygen plasma activation treatment or are directly compounded with the composite slurry, and the power of the atmospheric pressure oxygen plasma activation treatment is 250W-350W, the treatment time is 3min-5min, and the substrate moving speed is 0.4m/min-0.6m/min. Preferably, the starch substance is a single variety or a compound with any proportion in corn starch, waxy corn starch, tapioca starch and potato starch, the nano inorganic filler is a single variety or a compound with any proportion in silicon dioxide, montmorillonite, zinc oxide and nano cellulose, and the pH value of the Tris-HCl buffer solution is 8.0-9.0, and the concentration is 0.01mol/L. Preferably, the coupling agent is a silane coupling agent, the crosslinking agent used for crosslinking modification is at least one of sodium trimetaphosphate, adipic acid and phosphorus oxychloride, the PET fiber base material is one of PET fiber, PET/CoPET bi-component fiber, hollow PET fiber and low-gram-weight PET fiber, and the gram weight of the low-gram-weight PET fiber is 130g/m < 2 > -140g/m < 2 >. Preferably, a plasticizer is further added into the modified starch-based composite slurry, wherein the plasticizer is a single variety or a compound with any proportion in glycerol, polyethylene glycol, pr