CN116084203A - 一种坑纸的生产工艺 - Google Patents
一种坑纸的生产工艺 Download PDFInfo
- Publication number
- CN116084203A CN116084203A CN202310217755.6A CN202310217755A CN116084203A CN 116084203 A CN116084203 A CN 116084203A CN 202310217755 A CN202310217755 A CN 202310217755A CN 116084203 A CN116084203 A CN 116084203A
- Authority
- CN
- China
- Prior art keywords
- calcium carbonate
- production process
- pit
- drying
- stirring
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 56
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims abstract description 156
- 240000008042 Zea mays Species 0.000 claims abstract description 80
- 235000005824 Zea mays ssp. parviglumis Nutrition 0.000 claims abstract description 80
- 235000002017 Zea mays subsp mays Nutrition 0.000 claims abstract description 80
- 235000005822 corn Nutrition 0.000 claims abstract description 80
- 229910000019 calcium carbonate Inorganic materials 0.000 claims abstract description 77
- 239000000123 paper Substances 0.000 claims abstract description 72
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 71
- 238000002360 preparation method Methods 0.000 claims abstract description 61
- 239000011248 coating agent Substances 0.000 claims abstract description 51
- 238000000576 coating method Methods 0.000 claims abstract description 51
- 239000000843 powder Substances 0.000 claims abstract description 42
- 239000003365 glass fiber Substances 0.000 claims abstract description 37
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 32
- 238000003756 stirring Methods 0.000 claims abstract description 27
- 239000012792 core layer Substances 0.000 claims abstract description 26
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 25
- 238000001035 drying Methods 0.000 claims abstract description 25
- 229910021389 graphene Inorganic materials 0.000 claims abstract description 25
- 239000010410 layer Substances 0.000 claims abstract description 25
- 229920005610 lignin Polymers 0.000 claims abstract description 23
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims abstract description 21
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- 238000005303 weighing Methods 0.000 claims abstract description 8
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- 238000000034 method Methods 0.000 claims abstract 3
- 239000010902 straw Substances 0.000 claims description 28
- 235000021355 Stearic acid Nutrition 0.000 claims description 24
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 claims description 24
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 claims description 24
- 239000008117 stearic acid Substances 0.000 claims description 24
- 229920001661 Chitosan Polymers 0.000 claims description 21
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 21
- 239000005543 nano-size silicon particle Substances 0.000 claims description 21
- 235000012239 silicon dioxide Nutrition 0.000 claims description 21
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- 229910000420 cerium oxide Inorganic materials 0.000 claims description 9
- BMMGVYCKOGBVEV-UHFFFAOYSA-N oxo(oxoceriooxy)cerium Chemical compound [Ce]=O.O=[Ce]=O BMMGVYCKOGBVEV-UHFFFAOYSA-N 0.000 claims description 9
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 claims description 6
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- WYTZZXDRDKSJID-UHFFFAOYSA-N (3-aminopropyl)triethoxysilane Chemical compound CCO[Si](OCC)(OCC)CCCN WYTZZXDRDKSJID-UHFFFAOYSA-N 0.000 claims description 2
- IXPNQXFRVYWDDI-UHFFFAOYSA-N 1-methyl-2,4-dioxo-1,3-diazinane-5-carboximidamide Chemical compound CN1CC(C(N)=N)C(=O)NC1=O IXPNQXFRVYWDDI-UHFFFAOYSA-N 0.000 claims description 2
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- 229920005749 polyurethane resin Polymers 0.000 claims description 2
- 239000000661 sodium alginate Substances 0.000 claims description 2
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- 229940005550 sodium alginate Drugs 0.000 claims description 2
- 238000010521 absorption reaction Methods 0.000 description 13
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- 206010024796 Logorrhoea Diseases 0.000 description 10
- 239000000126 substance Substances 0.000 description 10
- VZSRBBMJRBPUNF-UHFFFAOYSA-N 2-(2,3-dihydro-1H-inden-2-ylamino)-N-[3-oxo-3-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)propyl]pyrimidine-5-carboxamide Chemical compound C1C(CC2=CC=CC=C12)NC1=NC=C(C=N1)C(=O)NCCC(N1CC2=C(CC1)NN=N2)=O VZSRBBMJRBPUNF-UHFFFAOYSA-N 0.000 description 9
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- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 6
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- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 2
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- 238000010257 thawing Methods 0.000 description 2
- YLZOPXRUQYQQID-UHFFFAOYSA-N 3-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)-1-[4-[2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidin-5-yl]piperazin-1-yl]propan-1-one Chemical compound N1N=NC=2CN(CCC=21)CCC(=O)N1CCN(CC1)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F YLZOPXRUQYQQID-UHFFFAOYSA-N 0.000 description 1
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Classifications
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- D21H19/00—Coated paper; Coating material
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- D21H19/00—Coated paper; Coating material
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- D21H19/00—Coated paper; Coating material
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- D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
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- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/64—Paper recycling
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- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Dispersion Chemistry (AREA)
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Abstract
本申请公开了一种坑纸的生产工艺。坑纸的生产工艺,包括以下步骤:平板层的制备:称取碎废纸、硅藻土、玻璃纤维、淀粉、石墨烯和水搅拌,进行打浆,抄造,烘干,得到平板层;波纹内芯层的制备:称取碎废纸、硅藻土、玻璃纤维、淀粉、石墨烯和水搅拌,进行打浆,抄造,烘干,进行压纹处理,得到波纹内芯层;在波纹内芯层的楞峰上涂抹粘合剂,将平板层粘合在波纹内芯层的一侧,烘干;在平板层远离波纹内芯层的一侧涂覆防水涂料,烘干,得到坑纸;防水涂料包括以下组分:环氧丙烯酸树脂、改性玉米秸秆粉、木质素纤维、有机硅消泡剂、分散剂、纳米碳酸钙、乙二醇、增稠剂。本申请制备的坑纸具有较好的力学性能和防水性能。
Description
技术领域
本申请涉及纸生产的技术领域,尤其是涉及一种坑纸的生产工艺。
背景技术
坑纸是一张平顺的牛皮纸与波浪形的纸(又叫波纹内芯)裱合而成,是纸包装的重要材料之一。坑纸的种类多种多样,包括A形、B形、C形等多种类型,由于应用场合不同而使用不同类型的坑纸。
坑纸因具有成本低、加工易、质量轻、强度大、印刷适应性强等优点而得到广泛应用,采用坑纸加工成的纸箱可用于储存食品或电子产品,方便储存和运输,坑纸通常采用草浆或木浆、纤维素纤维和高分子粘合剂制作而成,加工性强,但是坑纸的防潮性差,极易渗入水分,进而导致坑纸的强度下降,甚至塌陷损坏,进而容易损坏包装内的产品。
发明内容
为了改善坑纸的防潮性差的问题,本申请提供了一种坑纸的生产工艺。
本申请提供了一种坑纸的生产工艺,采用如下的技术方案:
一种坑纸的生产工艺,包括以下步骤:
(1)平板层的制备:称取碎废纸、硅藻土、玻璃纤维、淀粉、石墨烯和水搅拌,进行打浆1-3h,抄造,烘干,得到平板层;
(2)波纹内芯层的制备:称取碎废纸、硅藻土、玻璃纤维、淀粉、石墨烯和水搅拌,进行打浆1-3h,抄造,烘干,进行压纹处理,得到波纹内芯层;
(3)在波纹内芯层的楞峰上涂抹粘合剂,将平板层粘合在波纹内芯层的一侧,在温度120-155℃下烘干2-4h;在平板层远离波纹内芯层的一侧涂覆防水涂料,在温度120-130℃下,烘干3-6min,得到坑纸;
所述防水涂料包括以下重量份的组分:15-25份环氧丙烯酸树脂、10-16份改性玉米秸秆粉、5-9份木质素纤维、1-3份有机硅消泡剂、1-5份分散剂、12-23份纳米碳酸钙、10-30份乙二醇、2-4份增稠剂。
通过采用上述技术方案,平板层和波纹内芯层均采用碎废纸、硅藻土、玻璃纤维、淀粉、石墨烯和水混合打浆制得,采用碎废纸有效地避免了废纸丢弃时所造成的环境污染与资源的浪费,降低了生产成本,硅藻土具有的孔隙度大、吸附性强的特点,玻璃纤维具有高强度、耐热性和耐腐蚀性,硅藻土负载在玻璃纤维的外表面,增加玻璃纤维的比表面积,石墨烯具有良好的力学特性和抗菌性,能够对负载硅藻土的玻璃纤维进行包覆,增加了玻璃纤维的力学强度,与碎废纸混合,增加了碎废纸的机械强度、抗菌性、阻燃性和耐腐蚀性,淀粉具有一定的胶黏作用,增加了碎废纸的粘结性,同时使各组分具有较好的相容性,进而增强平板层和波纹内芯层的力学强度等综合性能。
防水涂料中,环氧丙烯酸树脂具有优良的物理力学性能和耐老化、耐冻融、耐腐蚀性能、防水性强,改性玉米秸秆粉具有优良的摩擦特性、粘性,加入可提高防水涂料的粘结度、内聚力、抗冻、憎水性,降低吸水率,木质素纤维起到抗裂作用、提高生产稳定性、增加强度、增强附着力,改性玉米秸秆粉与木质素纤维混合提高防水涂料的附着力,有助于增加防水涂料和平板层之间的粘结性,增加防水涂料的防水持久性,有机硅消泡剂消除泡沫,避免防水涂料表面形成孔隙、凹坑、裂缝等现象,增加防水涂料表面的平整性,纳米碳酸钙具有较好的补强效果,与改性玉米秸秆粉、木质素纤维配合,共同提高涂料的遮盖力、光泽度、防水性、附着力等性能。
优选的,所述硅藻土、玻璃纤维和石墨烯的质量比为1:0.4-0.8:0.05-0.09。
通过采用上述技术方案,控制硅藻土、玻璃纤维和石墨烯的质量比在一定的范围内,有助于得到力学强度高的平板层和波纹内芯层,硅藻土、玻璃纤维和石墨烯之间具有协同作用,硅藻土负载在玻璃纤维和石墨烯的表面,石墨烯对玻璃纤维进行包覆,形成网状空间结构,提高玻璃纤维的力学强度,进而后续增加碎废纸的力学性能、阻燃性和耐化学性能。
优选的,改性玉米秸秆粉的制备方法,包括如下步骤:
(1)将废弃的玉米秸秆粉碎至80-100目,然后加入氢氧化钠溶液在温度60-80℃下搅拌2-3h,水洗至中性,干燥;
(2)向步骤(1)处理后的玉米秸秆中加入纳米二氧化硅,超声1-2h,然后再加入壳聚糖,搅拌1-3h,备用;
(3)向步骤(2)处理后的玉米秸秆中加入硅烷偶联剂,在温度为80-90℃的条件下搅拌1-2h,固化,粉碎,得到改性玉米秸秆粉。
通过采用上述技术方案,对废弃的玉米秸秆进行预处理,加入氢氧化钠溶液进行浸泡,使玉米秸秆中的木质素变为羟基木质素,撕断纤维素与木质素的复合物,让纤维素吸水膨胀,扩大玉米秸秆的体积空间,使植物细胞间的镶嵌物质与细胞壁松散,有助于后续纳米二氧化硅的负载,纳米二氧化硅负载在玉米秸秆的结构空间中,增加玉米秸秆的结构强度硬度、抗菌性、抗腐蚀性和耐摩擦性能,壳聚糖对负载纳米二氧化硅的玉米秸秆进行包覆,增加纳米二氧化硅与玉米秸秆之间的粘结性,有助于增加玉米秸秆各种性能的持久性,同时壳聚糖具有较好的抗菌性、防水性和可降解性,有助于提高玉米秸秆的防水性能,硅烷偶联剂的加入增加各种组分之间的相容性,使各组分充分混合,进而改善后续防水涂料的防水性能、耐磨性和化学稳定性。
优选的,所述废弃的玉米秸秆、纳米二氧化硅和壳聚糖的质量比为1:0.02-0.06:0.1-0.5。
通过采用上述技术方案,控制玉米秸秆、纳米二氧化硅和壳聚糖之间的质量比在一定范围内,有助于得到力学性能和防水性能更优的改性玉米秸秆粉,玉米秸秆、纳米二氧化硅和壳聚糖之间具有协同作用,纳米二氧化硅负载在玉米秸秆的微观结构内,壳聚糖对玉米秸秆进行包覆,三者配合有助于提高玉米秸秆的力学性能、防水性能和化学稳定性,在后续制备防水涂料中,提高防水涂料的综合性能。
优选的,所述纳米碳酸钙的预处理方法,包括以下步骤:
(1)将纳米碳酸钙在温度900-1000℃下煅烧1-3h,然后加入纳米氧化铈进行搅拌1-3h,干燥,备用;
(2)将步骤(1)处理的纳米碳酸钙加入硬脂酸和钛酸酯偶联剂,在60-80℃下搅拌20-40min,过滤得到固体,干燥。
通过采用上述技术方案,纳米碳酸钙进行煅烧,去除纳米碳酸钙中的有机杂质,增加纳米碳酸钙结构中的孔隙,提高纳米碳酸钙的活性,纳米氧化铈具有抗紫外老化性能、防腐蚀性能、力学性能、热稳定性能和催化性能,纳米氧化铈嵌入在纳米碳酸钙的孔隙结构中,增加纳米碳酸钙的结构强度、防静电性能和耐高温性能;
纳米碳酸钙表面亲水疏油,呈强极性,在有机介质中难以均匀分散,与其他组分的结合力差,易造成界面缺陷,导致材料性能下降,采用硬脂酸对预处理后的纳米碳酸钙进行包覆,能极大的改善其亲油性,使其填充在防水涂料中时,其大的比表面积和高比表面能有利于碳酸钙颗粒与有机高聚物分子之间的结合牢固,能使防水涂料表面光艳、较高的防水性能和具有优异的补强性能;钛酸酯偶联剂作为增强促进剂使用,对于热塑性聚合物与干燥填料剂都有良好的偶联效果,将硬脂酸与钛酸酯偶联剂结合使用,具有较好的协同效果,钛酸酯偶联剂增加硬脂酸的反应活性,进而增加硬脂酸对纳米碳酸钙粒子的包覆,减小纳米碳酸钙粒子相互团聚的机率,有助于纳米碳酸钙粒子在聚合物基体中很好的分散,能够发挥稳定的化学性能。
优选的,所述纳米碳酸钙、硬脂酸和钛酸酯偶联剂的质量比为1:0.3-0.6:0.05-0.09。
通过采用上述技术方案,控制纳米碳酸钙、硬脂酸和钛酸酯偶联剂之间的质量比,得到性能更优的纳米碳酸钙,硬脂酸对纳米碳酸钙进行包覆,增加了纳米碳酸钙的亲油性,同时有助于降低纳米碳酸钙的团聚机率,有助于后续纳米碳酸钙在防水涂料中的稳定性,钛酸酯偶联剂能够促进硬脂酸的活性,有助于使硬脂酸更好的包覆纳米碳酸钙,进而增加后续纳米碳酸钙的化学稳定性。
优选的,所述分散剂为羧甲基纤维素和/或γ-氨丙基三乙氧基硅烷。
通过采用上述技术方案,分散剂在防水涂料中降低各个组分进行分散时所需要的时间与动能,平稳的分散的各组分,提高各组分的流通性,有助于各个组分均匀混合。
优选的,所述增稠剂为有机膨润土、海藻酸钠或凹凸棒石土中一种或多种。
通过采用上述技术方案,增稠剂增加了防水涂料的储存稳定性,防止防水涂料里的组分的沉降,同时能够避免防水涂料的流挂,保证防水涂料拥有良好的施工性能。
优选的,所述步骤(1)和步骤(2)中,搅拌的温度为80-90℃,搅拌时间2-4h。
通过采用上述技术方案,步骤(1)和步骤(2)中,控制加热温度为80-90℃,有助于各组分的均匀混合,进而改善组合物的溶解效率,有助于混合均匀。
优选的,所述粘合剂为热熔胶和/或聚氨酯树脂黏合剂。
通过采用上述技术方案,粘合剂增加波纹内芯层和平板层之间的粘结性,有助于波纹内芯层和平板层粘结稳定性,进而增加坑纸的使用周期。
综上所述,本申请具有如下有益效果:
1、本申请中平板层和波纹内芯层均采用碎废纸、硅藻土、玻璃纤维、淀粉、石墨烯和水混合打浆制得,采用碎废纸有效地避免了废纸丢弃时所造成的环境污染与资源的浪费,降低了生产成本,硅藻土具有的孔隙度大、吸附性强的特点,玻璃纤维具有高强度、耐热性和耐腐蚀性,硅藻土负载在玻璃纤维的外表面,增加玻璃纤维的比表面积,石墨烯具有良好的力学特性和抗菌性,能够对负载硅藻土的玻璃纤维进行包覆,增加了玻璃纤维的力学强度,与碎废纸混合,增加了碎废纸的机械强度、抗菌性、阻燃性和耐腐蚀性。
2、本申请中防水涂料中,环氧丙烯酸树脂具有优良的物理力学性能和耐老化、耐冻融、耐腐蚀性能、防水性强,改性玉米秸秆粉具有优良的摩擦特性、粘性,加入可提高防水涂料的粘结度、内聚力、抗冻、憎水性,降低吸水率,木质素纤维起到抗裂作用、提高生产稳定性、增加强度、增强附着力,改性玉米秸秆粉与木质素纤维混合提高防水涂料的附着力,有助于增加防水涂料和平板层之间的粘结性,增加防水涂料的防水持久性。
3、本申请中有机硅消泡剂消除泡沫,避免防水涂料表面形成孔隙、凹坑、裂缝等现象,纳米碳酸钙具有较好的补强效果,与改性玉米秸秆粉、木质素纤维配合,共同提高涂料的遮盖力、光泽度、防水性、附着力等性能。
具体实施方式
以下结合实施例对本申请作进一步详细说明。
实施例及对比例中所使用的原料均可通过市售获得,其中,分散剂为羧甲基纤维素,增稠剂为有机膨润土,粘合剂为热熔胶。
改性玉米秸秆粉的制备例
制备例1-1
改性玉米秸秆粉的制备方法,包括如下步骤:
(1)将1kg废弃的玉米秸秆粉碎至80-100目,然后加入2L质量分数为20%的氢氧化钠溶液在温度70℃下搅拌3h,水洗至中性,干燥;
(2)向步骤(1)处理后的玉米秸秆中加入纳米二氧化硅,超声2h,然后再加入壳聚糖,搅拌3h,备用;
(3)向步骤(2)处理后的玉米秸秆中加入0.3kg硅烷偶联剂KH-560,在温度为85℃的条件下搅拌2h,固化,粉碎,得到改性玉米秸秆粉;其中,废弃的玉米秸秆、纳米二氧化硅和壳聚糖的质量比为1:0.04:0.3。
制备例1-2
与制备例1-1的区别在于,步骤(1)中,不加入纳米二氧化硅。
制备例1-3
与制备例1-1的区别在于,步骤(1)中,不加入壳聚糖。
制备例1-4
与制备例1-1的区别在于,废弃的玉米秸秆、纳米二氧化硅和壳聚糖的质量比为1:0.02:0.1。
制备例1-5
与制备例1-1的区别在于,废弃的玉米秸秆、纳米二氧化硅和壳聚糖的质量比为1:0.06:0.5。
制备例1-6
与制备例1-1的区别在于,废弃的玉米秸秆、纳米二氧化硅和壳聚糖的质量比为1:0.09:0.8。
制备例1-7
与制备例1-1的区别在于,废弃的玉米秸秆、纳米二氧化硅和壳聚糖的质量比为1:0.01:0.05。
制备例1-8
与制备例1-1的区别在于,步骤(1)中,不加入氢氧化钠溶液。
纳米碳酸钙的制备例
制备例2-1
纳米碳酸钙的预处理方法,包括以下步骤:
(1)将0.5kg纳米碳酸钙在温度950℃下煅烧3h,然后加入0.05kg纳米氧化铈进行搅拌2h,干燥,备用;
(2)将步骤(1)处理的纳米碳酸钙加入硬脂酸和钛酸酯偶联剂,在70℃下搅拌30min,过滤得到固体,干燥;其中,纳米碳酸钙、硬脂酸和钛酸酯偶联剂的质量比为1:0.45:0.07。
制备例2-2
与制备例2-1的区别在于,步骤(1)中,不添加纳米氧化铈。
制备例2-3
与制备例2-1的区别在于,步骤(1)中,不添加钛酸酯偶联剂。
制备例2-4
与制备例2-1的区别在于,纳米碳酸钙、硬脂酸和钛酸酯偶联剂的质量比为1:0.3:0.05。
制备例2-5
与制备例2-1的区别在于,纳米碳酸钙、硬脂酸和钛酸酯偶联剂的质量比为1:0.6:0.09。
制备例2-6
与制备例2-1的区别在于,纳米碳酸钙、硬脂酸和钛酸酯偶联剂的质量比为1:0.9:0.02。
制备例2-7
与制备例2-1的区别在于,纳米碳酸钙、硬脂酸和钛酸酯偶联剂的质量比为1:0.1:0.12。
制备例2-8
与制备例2-1的区别在于,步骤(1)中,纳米碳酸钙不进行煅烧。
实施例
实施例1
一种坑纸的生产工艺,包括以下步骤:
(1)平板层的制备:称取5kg碎废纸、1.2kg硅藻土、玻璃纤维、0.5kg淀粉、石墨烯和10kg水搅拌,进行打浆3h,抄造,烘干,得到平板层;
(2)波纹内芯层的制备:称取5kg碎废纸、1.2kg硅藻土、玻璃纤维、0.5kg淀粉、石墨烯和10kg水搅拌,进行打浆3h,抄造,烘干,进行压纹处理,得到波纹内芯层;
(3)在波纹内芯层的楞峰上涂抹粘合剂,涂布量以干膜计为5g/m2,将平板层粘合在波纹内芯层的一侧,在温度135℃下烘干3h;在平板层远离波纹内芯层的一侧涂覆防水涂料,涂布量以干膜计为10g/m2,在温度125℃下,烘干5min,得到坑纸;
防水涂料包括以下重量的组分:20kg环氧丙烯酸树脂、14kg改性玉米秸秆粉、7kg木质素纤维、2kg有机硅消泡剂、3kg分散剂、20kg纳米碳酸钙、20kg乙二醇、3kg增稠剂,将环氧丙烯酸树脂、改性玉米秸秆粉、木质素纤维、有机硅消泡剂、分散剂、纳米碳酸钙、乙二醇和增稠剂混合均匀制得防水涂料;其中,硅藻土、玻璃纤维和石墨烯的质量比为1:0.6:0.07。
改性玉米秸秆粉采用制备例1-1制备;纳米碳酸钙采用制备例2-1制备。
实施例2
一种坑纸的生产工艺,与实施例1的区别在于,改性玉米秸秆粉采用制备例1-2制备。
实施例3
一种坑纸的生产工艺,与实施例1的区别在于,改性玉米秸秆粉采用制备例1-3制备。
实施例4
一种坑纸的生产工艺,与实施例1的区别在于,改性玉米秸秆粉采用制备例1-4制备。
实施例5
一种坑纸的生产工艺,与实施例1的区别在于,改性玉米秸秆粉采用制备例1-5制备。
实施例6
一种坑纸的生产工艺,与实施例1的区别在于,改性玉米秸秆粉采用制备例1-6制备。
实施例7
一种坑纸的生产工艺,与实施例1的区别在于,改性玉米秸秆粉采用制备例1-7制备。
实施例8
一种坑纸的生产工艺,与实施例1的区别在于,改性玉米秸秆粉采用制备例1-8制备。
实施例9
一种坑纸的生产工艺,与实施例1的区别在于,纳米碳酸钙采用制备例2-2制备。
实施例10
一种坑纸的生产工艺,与实施例1的区别在于,纳米碳酸钙采用制备例2-3制备。
实施例11
一种坑纸的生产工艺,与实施例1的区别在于,纳米碳酸钙采用制备例2-4制备。
实施例12
一种坑纸的生产工艺,与实施例1的区别在于,纳米碳酸钙采用制备例2-5制备。
实施例13
一种坑纸的生产工艺,与实施例1的区别在于,纳米碳酸钙采用制备例2-6制备。
实施例14
一种坑纸的生产工艺,与实施例1的区别在于,纳米碳酸钙采用制备例2-7制备。
实施例15
一种坑纸的生产工艺,与实施例1的区别在于,纳米碳酸钙采用制备例2-8制备。
实施例16
一种坑纸的生产工艺,与实施例1的区别在于,硅藻土、玻璃纤维和石墨烯的质量比为1:0.4:0.05。
实施例17
一种坑纸的生产工艺,与实施例1的区别在于,硅藻土、玻璃纤维和石墨烯的质量比为1:0.8:0.09。
实施例18
一种坑纸的生产工艺,与实施例1的区别在于,硅藻土、玻璃纤维和石墨烯的质量比为1:1.2:0.12。
实施例19
一种坑纸的生产工艺,与实施例1的区别在于,硅藻土、玻璃纤维和石墨烯的质量比为1:0.1:0.02。
实施例20
一种坑纸的生产工艺,与实施例1的区别在于,防水涂料包括以下重量的组分:15kg环氧丙烯酸树脂、10kg改性玉米秸秆粉、5kg木质素纤维、1kg有机硅消泡剂、1kg分散剂、23kg纳米碳酸钙、10kg乙二醇、2kg增稠剂。
实施例21
一种坑纸的生产工艺,与实施例1的区别在于,防水涂料包括以下重量的组分:25kg环氧丙烯酸树脂、16kg改性玉米秸秆粉、9kg木质素纤维、3kg有机硅消泡剂、5kg分散剂、12kg纳米碳酸钙、30kg乙二醇、4kg增稠剂。
对比例
对比例1
一种坑纸的生产工艺,与实施例1的区别在于,防水涂料包括以下重量的组分:10kg环氧丙烯酸树脂、5kg改性玉米秸秆粉、3kg木质素纤维、0.5kg有机硅消泡剂、9kg分散剂、10kg纳米碳酸钙、8kg乙二醇、1kg增稠剂。
对比例2
一种坑纸的生产工艺,与实施例1的区别在于,防水涂料包括以下重量的组分:30kg环氧丙烯酸树脂、20kg改性玉米秸秆粉、12kg木质素纤维、4kg有机硅消泡剂、0.5kg分散剂、26kg纳米碳酸钙、35kg乙二醇、6kg增稠剂。
对比例3
一种坑纸的生产工艺,与实施例1的区别在于,防水涂料中不添加木质素纤维。
对比例4
一种坑纸的生产工艺,与实施例1的区别在于,防水涂料中用等量的玉米秸秆粉代替改性玉米秸秆粉。
对比例5
一种坑纸的生产工艺,与实施例1的区别在于,防水涂料中不添加纳米碳酸钙。
性能检测试验
将实施例1-21和对比例1-5制备得到的坑纸进行性能测试,按照GB/T2679.17-1997测试边压强度;按照GB/T6545-1998测定耐破强度;防水性能采用接触角测定仪进行测试,吸水量按照GB/1540-2002测定,结果见表1。
表1实施例和对比例的测试数据
从表1可以看出,本申请实施例1、实施例4-5、实施例11-12、实施例16-17和实施例20-21制备的坑纸具有较好的力学性能和防水性能,边压强度达到9.85kN/m,耐破强度达到1689kPa,接触角达到129.5°,吸水量达到0.81g/m2,说明制备的坑纸具有优良的力学性能,各组分相互配合提高防水涂料的遮盖力、光泽度、防水性、附着力等性能。
实施例2改性玉米秸秆粉中不加入纳米二氧化硅,从表1看出,边压强度达到8.12kN/m,耐破强度达到1503kPa,接触角达到110.3°,吸水量达到1.05g/m2,说明纳米二氧化硅能够增加玉米秸秆的结构强度硬度、抗菌性、抗腐蚀性和耐摩擦性能,进而有助于后续增加防水涂料的综合性能;实施例3改性玉米秸秆粉中不加入壳聚糖,边压强度达到8.94kN/m,耐破强度达到1565kPa,接触角达到105.8°,吸水量达到1.38g/m2,说明壳聚糖具有较好的抗菌性、防水性和可降解性,有助于提高玉米秸秆的防水性能;实施例8改性玉米秸秆粉中不加入氢氧化钠溶液,边压强度达到9.16kN/m,耐破强度达到1578kPa,接触角达到115.9°,吸水量达到0.97g/m2,说明氢氧化钠对玉米秸秆进行剥蚀,有助于后续组分的负载,进而改变防水涂料的性能。
实施例6-7改变废弃的玉米秸秆、纳米二氧化硅和壳聚糖的质量比,相比于实施例1和实施例2-5,制备的坑纸的生产工艺力学性能和防水性能测试数据优于实施例2-3,但差于实施例1和实施例4-5,表明玉米秸秆、纳米二氧化硅和壳聚糖之间具有协同作用,纳米二氧化硅负载在玉米秸秆的微观结构内,壳聚糖对玉米秸秆进行包覆,三者配合有助于提高玉米秸秆的力学性能、防水性能和化学稳定性,在后续制备防水涂料中,提高防水涂料的综合性能。
实施例9纳米碳酸钙的预处理方法中不加入纳米氧化铈,实施例10纳米碳酸钙的预处理方法中不加入钛酸酯偶联剂,实施例15纳米碳酸钙的预处理方法中不进行纳米碳酸钙的煅烧,从表1看出,边压强度、耐破强度、接触角均不同程度的降低,而吸水量对应这接触角的变化而变化,说明纳米碳酸钙进行煅烧,去除纳米碳酸钙中的有机杂质,增加纳米碳酸钙结构中的孔隙,有助于后续纳米氧化铈的负载,纳米氧化铈能够改善纳米碳酸钙的力学性能,而钛酸酯偶联剂作为增强促进剂使用,促进硬脂酸的包覆,提高防水材料的防水性能。
实施例13-14改变纳米碳酸钙、硬脂酸和钛酸酯偶联剂的质量比,相比于实施例1和实施例11-14,制备的坑纸的生产工艺力学性能和防水性能测试数据优于实施例9-10,但差于实施例1和实施例11-12,表明纳米碳酸钙、硬脂酸和钛酸酯偶联剂之间具有协同作用,硬脂酸对纳米碳酸钙进行包覆,增加了纳米碳酸钙的亲油性,同时有助于降低纳米碳酸钙的团聚机率,有助于后续纳米碳酸钙在防水涂料中的稳定性,钛酸酯偶联剂能够促进硬脂酸的活性,有助于使硬脂酸更好的包覆纳米碳酸钙,进而增加后续纳米碳酸钙的化学稳定性。
实施例18-19改变硅藻土、玻璃纤维和石墨烯的质量比,边压强度达到7.58kN/m,耐破强度达到1425kPa,接触角达到120.3°,吸水量达到1.53g/m2,说明硅藻土、玻璃纤维和石墨烯之间具有协同作用,硅藻土负载在玻璃纤维和石墨烯的表面,石墨烯对玻璃纤维进行包覆,形成网状空间结构,提高玻璃纤维的力学强度,进而后续增加碎废纸的力学性能、防水性和耐化学性能。
对比例1-2改变坑纸的生产工艺的原料用量,从表1看出,相比于实施例1,边压强度、耐破强度、接触角均均大幅度下降,而吸水量对应这接触角的变化而变化,表明各原料组分按照一定的含量配比使得制品具有较好的力学强度、防水性,各原料用量的变化影响坑纸的力学性能和防水性等综合性能。
对比例3防水涂料中不添加木质素纤维,从表1看出,边压强度达到6.12kN/m,耐破强度达到1312kPa,接触角达到90.1°,吸水量达到2.45g/m2,说明木质素纤维起到抗裂作用、提高生产稳定性、增加强度、增强附着力,改性玉米秸秆粉与木质素纤维混合提高防水涂料的附着力,有助于增加防水涂料和平板层之间的粘结性,进而增加防水涂料的防水持久性。
对比例4防水涂料中用等量的玉米秸秆粉代替改性玉米秸秆粉,从表1看出,边压强度达到8.66kN/m,耐破强度达到1503kPa,接触角达到108.7°,吸水量达到2.12g/m2,说明本申请改性的玉米秸秆粉具有较强的空间结构,改善后续防水涂料的防水性能、耐磨性和化学稳定性。
对比例3防水涂料中不添加纳米碳酸钙,从表1看出,边压强度达到6.23kN/m,耐破强度达到1320kPa,接触角达到92.1°,吸水量达到2.24g/m2,说明纳米碳酸钙具有较好的补强效果,与改性玉米秸秆粉、木质素纤维配合,共同提高涂料的遮盖力、光泽度、防水性、附着力等性能。
本具体实施例仅仅是对本申请的解释,其并不是对本申请的限制,本领域技术人员在阅读完本说明书后可以根据需要对本实施例做出没有创造性贡献的修改,但只要在本申请的权利要求范围内都受到专利法的保护。
Claims (10)
1.一种坑纸的生产工艺,其特征在于,包括以下步骤:
(1)平板层的制备:称取碎废纸、硅藻土、玻璃纤维、淀粉、石墨烯和水搅拌,进行打浆1-3h,抄造,烘干,得到平板层;
(2)波纹内芯层的制备:称取碎废纸、硅藻土、玻璃纤维、淀粉、石墨烯和水搅拌,进行打浆1-3h,抄造,烘干,进行压纹处理,得到波纹内芯层;
(3)在波纹内芯层的楞峰上涂抹粘合剂,将平板层粘合在波纹内芯层的一侧,在温度120-155℃下烘干2-4h;在平板层远离波纹内芯层的一侧涂覆防水涂料,在温度120-130℃下,烘干3-6min,得到坑纸;
所述防水涂料包括以下重量份的组分:15-25份环氧丙烯酸树脂、10-16份改性玉米秸秆粉、5-9份木质素纤维、1-3份有机硅消泡剂、1-5份分散剂、12-23份纳米碳酸钙、10-30份乙二醇、2-4份增稠剂。
2.根据权利要求1所述的一种坑纸的生产工艺,其特征在于,所述硅藻土、玻璃纤维和石墨烯的质量比为1:0.4-0.8:0.05-0.09。
3.根据权利要求1所述的一种坑纸的生产工艺,其特征在于,所述改性玉米秸秆粉的制备方法,包括如下步骤:
(1)将废弃的玉米秸秆粉碎至80-100目,然后加入氢氧化钠溶液在温度60-80℃下搅拌2-3h,水洗至中性,干燥;
(2)向步骤(1)处理后的玉米秸秆中加入纳米二氧化硅,超声1-2h,然后再加入壳聚糖,搅拌1-3h,备用;
(3)向步骤(2)处理后的玉米秸秆中加入硅烷偶联剂,在温度为80-90℃的条件下搅拌1-2h,固化,粉碎,得到改性玉米秸秆粉。
4.根据权利要求3所述的一种坑纸的生产工艺,其特征在于,所述废弃的玉米秸秆、纳米二氧化硅和壳聚糖的质量比为1:0.02-0.06:0.1-0.5。
5.根据权利要求1所述的一种坑纸的生产工艺,其特征在于,所述纳米碳酸钙的预处理方法,包括以下步骤:
(1)将纳米碳酸钙在温度900-1000℃下煅烧1-3h,然后加入纳米氧化铈进行搅拌1-3h,干燥,备用;
(2)将步骤(1)处理的纳米碳酸钙加入硬脂酸和钛酸酯偶联剂,在60-80℃下搅拌20-40min,过滤得到固体,干燥。
6.根据权利要求5所述的一种坑纸的生产工艺,其特征在于,所述纳米碳酸钙、硬脂酸和钛酸酯偶联剂的质量比为1:0.3-0.6:0.05-0.09。
7.根据权利要求1所述的一种坑纸的生产工艺,其特征在于,所述分散剂为羧甲基纤维素和/或γ-氨丙基三乙氧基硅烷。
8.根据权利要求1所述的一种坑纸的生产工艺,其特征在于,所述增稠剂为有机膨润土、海藻酸钠或凹凸棒石土中一种或多种。
9.根据权利要求1所述的一种坑纸的生产工艺,其特征在于,所述步骤(1)和步骤(2)中,搅拌的温度为80-90℃,搅拌时间2-4h。
10.根据权利要求1所述的一种坑纸的生产工艺的制备方法,其特征在于,所述粘合剂为热熔胶和/或聚氨酯树脂黏合剂。
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