CN117342799A - 一种建筑抗菌玻璃的生产工艺 - Google Patents
一种建筑抗菌玻璃的生产工艺 Download PDFInfo
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- C03C17/00—Surface treatment of glass, not in the form of fibres or filaments, by coating
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- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
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- C03B27/012—Tempering or quenching glass products by heat treatment, e.g. for crystallisation; Heat treatment of glass products before tempering by cooling
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- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
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- C03C17/00—Surface treatment of glass, not in the form of fibres or filaments, by coating
- C03C17/001—General methods for coating; Devices therefor
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- C03C17/00—Surface treatment of glass, not in the form of fibres or filaments, by coating
- C03C17/006—Surface treatment of glass, not in the form of fibres or filaments, by coating with materials of composite character
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- C03—GLASS; MINERAL OR SLAG WOOL
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- C03C2217/00—Coatings on glass
- C03C2217/40—Coatings comprising at least one inhomogeneous layer
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- C03—GLASS; MINERAL OR SLAG WOOL
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- C03C2218/00—Methods for coating glass
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Abstract
本发明涉及玻璃生产技术领域,尤其涉及一种建筑抗菌玻璃的生产工艺。包括以下步骤:1)配制抗菌溶浆:将粘结剂按比例用水稀释,充分搅拌均匀,得到粘性溶浆;再加入铜盐、锌盐中的至少一种,搅拌均匀,制得抗菌溶浆;2)将玻璃基片进行清洗;3)将清洗后的玻璃基片用所述抗菌溶浆涂覆;4)将覆有抗菌膜的玻璃进行钢化处理、清洗,得到建筑抗菌玻璃。本发明将抗菌层的固化与玻璃物理钢化一次完成,完全不改变原有钢化生产工艺。其抗菌制品活性值R>2,透过率>85,b值<1,色差△E<1,且工艺方法简单易操作,原料易得,且适用于大片建筑玻璃的生产,利于工业化推广。
Description
技术领域
本发明涉及玻璃生产技术领域,尤其涉及一种建筑抗菌玻璃的生产工艺。
背景技术
细菌无时无刻存在于人们的生活中,尤其在人群比较聚集的像医院、学校、超市、公共图书馆、会场等场所,加强抗菌、抵抗感染已成为人们的习惯。
现在建造的建筑物为了美观,多数采用玻璃材质,尤其对于病人比较集中的医院系统、人员流动比较密集的学校、超市、图书馆等,玻璃材料更是比比皆是,所以针对建筑玻璃的抗菌处理值得我们关注。
目前建筑抗菌玻璃生产工艺主要是镀膜和离子交换两种方式:
(1)镀膜玻璃是在玻璃表面镀一层或多层金属、合金或金属化合物,以改变玻璃的性能。镀膜玻璃的生产方法很多,主要有①真空蒸发法、②
化学气相沉积法、③真空磁控溅射法、④溶胶—凝胶法。第①②两种方法生产建筑抗菌玻璃,主要存在以下问题:一是玻璃在镀膜过程中空间温度过高,易使抗菌剂氧化失效,二是上述方法只能在玻璃的单面进行镀膜,限制了建筑抗菌玻璃的使用效果和范围,生产方式不灵活;第③种方法存在的问题是抗菌剂最后在玻璃的表面是以原子态存在,抗菌效果不佳,且抗菌功能膜属于“软膜”,不适合长期暴露和接触使用;第④种方法最大的不足是产品的采光性受到影响。
(2)离子交换是将玻璃置于熔盐中进行离子交换,熔盐中抗菌金属离子会和玻璃中的碱金属离子进行交换,在玻璃表面形成一层抗菌层。离子交换抗菌玻璃的抗菌能力更长效持久,且可在不降低玻璃透过率的前提下,维持玻璃的表面硬度。但是对于大尺寸的玻璃,尤其是建筑玻璃,如果采用盐浴这种方式进行离子交换,会受到化强炉大小、生产成本高、不易操作等因素限制,导致无法量产。因此,研发一种适用于大片玻璃的抗菌玻璃生产工艺,具有十分重要的意义。
发明内容
本发明的目的是提供一种建筑抗菌玻璃的生产工艺,生产成本较低,操作简便,且适用于大片建筑玻璃的生产。
为解决上述技术问题,本发明所采用的技术方案如下:
一种建筑抗菌玻璃的生产工艺,具体包括以下步骤:
1)配制抗菌溶浆;
将粘结剂按比例用水稀释,充分搅拌均匀,得到粘性溶浆;再按比例加入铜盐或锌盐中的至少一种,搅拌均匀,制得抗菌溶浆;
2)将玻璃基片进行清洗,去除所述玻璃基片表面的污垢;
3)在所述清洗后的玻璃基片上涂覆抗菌溶浆,形成一层抗菌膜;
4)将覆有抗菌膜的玻璃进行钢化处理,清洗,得到建筑抗菌玻璃。
进一步地,所述粘结剂的制备方法,包括以下步骤:
(1)所述粘结剂的制备原料由以下组成:5-20wt%淀粉、2-10wt%无水乙醇、0.5-1.0wt%氢氧化钠、余量为纯水;
(2)将步骤1)的制备原料混合均匀,然后加热煮沸至透明糊状,最后烘干;
(3)将步骤2)得到的烘干物粉碎后用球磨机球磨,细度≤100um,即得所述粘结剂。
以下对各组分含量进行数值限定的理由加以说明:
本发明中通过对淀粉进行改性,使得淀粉更易糊化且易分散,糊化时不会出现小疙瘩现象。通过调节溶浆中的淀粉含量,一般控制在3%-5%,选择改性淀粉作为粘结剂,不仅可以很好的将抗菌剂覆着在玻璃表面,而且钢化高温时淀粉全部灰化,玻璃表面基本不会有残留物,易于清洗。
本发明主要通过Cu离子、Zn离子进行协调抗菌,Cu、Zn离子主要通过含Cu或Zn的硫酸盐或硝酸盐,进行离子交换获得,使得玻璃表面Cu离子≥0.003wt%,Zn离子≥0.006wt%,Cu离子≤Zn离子且0.009wt%≤Cu离子+Zn离子≤0.02wt%(通过抗菌处理后玻璃表面获得的Cu、Zn含量);如果只是采用Cu离子作为抗菌离子,实验发现玻璃表面Cu离子≥0.015wt%才能稳定抗菌,此时玻璃表面易出现Cu着色现象,影响外观,降低透过率;而单纯采用Zn作为离子作为抗菌离子,因为Zn离子的抗菌能力较弱,玻璃表面需要富集大量Zn离子才能有抗菌效果,同样的置换时间,那么离子交换过程中需要通过增加含Zn的无机盐来提高离子交换效率,通过实验当抗菌溶浆中添加3wt%硝酸锌时,玻璃表面获得Zn离子约0.013wt%,没有抗菌效果,将硝酸锌比例提高至5%,发现离子交换后玻璃表面出现雾面现象,严重影响外观。通过控制Cu盐、Zn盐含量、离子交换温度和时间,使得玻璃表面Cu离子≥0.003wt%,Zn离子≥0.006wt%,Cu离子≤Zn离子且0.009wt%≤Cu离子+Zn离子≤0.02wt%,可获得抗菌性能稳定、透过率高、外观不变的建筑抗菌玻璃。
本发明的有益效果是:本发明提供了一种建筑抗菌玻璃,通过在玻璃基片上涂覆抗菌溶浆,然后进行钢化处理,将抗菌层的固化与玻璃物理钢化一次完成,完全不改变原有钢化生产工艺。其抗菌制品活性值R>2,透过率>85,b值<1,色差△E<1,且工艺方法简单易操作,原料易得,利于工业化推广。
具体实施方式
本发明的实施例1~7通过如下方法制备:
1)配制抗菌溶浆
将粘结剂按比例用水稀释,充分搅拌均匀,得到一定质量比例的粘结剂溶液;再按比例加入CuSO4、ZnSO4,搅拌均匀,制得抗菌溶浆;
2)将玻璃基片进行清洗,去除所述玻璃基片表面的污垢;
3)将清洗后的玻璃基片浸没在抗菌溶浆中,待各部位都沾上抗菌溶浆后将玻璃基片提起,常温晾干,玻璃基片表面形成一层抗菌膜;
4)将覆有抗菌膜的玻璃进行钢化处理,清洗,得到建筑抗菌玻璃。
玻璃基片玻璃成分(wt%):SiO271.52%、Al2O34.33%、Na2O12.64%、K2O0.46%、CaO6.87%、MgO4.05%、Fe2O30.09、SnO20.04%。
其中所述粘结剂的制备方法,包括以下步骤:
(1)所述粘结剂的制备原料由以下组成:15wt%淀粉、5wt%无水乙醇、0.8wt%氢氧化钠、余量为纯水;
(2)将步骤1)的制备原料混合均匀,然后加热煮沸至透明糊状,最后烘干;
(3)将步骤2)得到的烘干物粉碎后用球磨机球磨,细度≤100um,即得所述粘结剂。
对比例1为玻璃基片,不做抗菌处理;
对比例2以普通预糊化淀粉作为粘结剂,按5wt%加入纯水中,搅拌均匀,获得5%淀粉溶液;按0.05wt%CuSO4、0.3wt%ZnSO4加入到5%wt淀粉溶液中,搅拌均匀,获得抗菌溶浆;将玻璃浸泡在抗菌溶浆中,待玻璃表面形成膜后,放入700℃烧4min,取出、清水清洗,观察玻璃外观。由于普通预糊化淀粉在水中不易分散,有团聚现象,导致抗菌溶浆在玻璃表面分布不均匀,有的地方膜厚有的膜较薄,离子交换后Cu、Zn离子在玻璃表面分布不均匀,膜厚处会出现Cu着色;
对比例3以市售得力胶水作为粘结剂,按比例加入CuSO4、ZnSO4,搅拌均匀,将玻璃浸泡在胶水中,待玻璃表面形成膜后,放入700℃烧4min,取出、清水清洗,观察玻璃外观。不易清洗,玻璃表面有圆圈型大小不一的印迹,不能采用。
表1抗菌性能测试
表2外观测试
分析与说明
如表1和表2所示,实施例1单纯通过Cu离子置换,可以达到抗菌效果,但是玻璃表面会出现铜着色,影响外观;实施例2引入Zn离子后,玻璃表面获得的Cu含量降低,但是依然会有着色;实施例3、4、5通过调节CuSO4、ZnSO4比例,其中最佳配方为0.05%CuSO4、0.3%ZnSO4、5%改性淀粉溶液,最终获得抗菌效果稳定,外观正常的玻璃;实施例5、6、7对不同添加量的改性淀粉进行对比,实施例6当改性淀粉添加量只有3%时,抗菌溶浆粘度较低,流动性好,Cu、Zn离子不易黏附在玻璃表面,造成涂覆不均匀,导致抗菌效果减弱或不稳定,而实施例7当改性淀粉添加量增多,如7%,抗菌溶浆粘度增大,Cu、Zn离子易黏附在玻璃表面,因流动性变差,局部涂层会变厚,导致玻璃局部出现铜着色和麻点现象。
综上所述,以实施例5为最佳实施例,对实施例5样品进行耐磨、耐水测试,具体如下:
耐磨测试:0000#钢丝绒磨2000次,然后按JIZ2801:2010进行抗菌性能评价;
耐水测试:样品按照JC/T939-2004在温度(50±2)℃的蒸馏水中浸泡16H后再按JIZ2801:2010进行抗菌性能评价
表3实施例5样品耐磨、耐水性能
如表3所示,实施例5玻璃经耐磨/耐水测试后,R>5,与未测试前对比抗菌效果未减弱,满足R≥2的要求,T仅降低0.1-0.2%%,满足T≥85%的要求,b<1,△E<1均满足要求。
实施例1-7及对比例各项测试定义及解释如下所示:
(1)铜、锌含量(%):采用布鲁克手持式XRF测试所得;
(2)透过率(T%):采用岛津紫外分光光度计UV-2600测试可见光部分透过率;
(3)L*a*b*值:采用岛津UV-2600紫外分光光度计测试透过率,再通过仪器自带软件“coloranylist”换算得到L*值、a*值、b*值;
(4)△E:依据QB/T1503-2011,△E=【(△L*)2+(△a*)2+(△
b*)2】1/2
(5)抗菌活性值:采用标准JIZ2801:2010中的方法检测。
Claims (10)
1.一种建筑抗菌玻璃的生产工艺,其特征在于:包括以下步骤:
1)配制抗菌溶浆
将粘结剂按比例用水稀释,充分搅拌均匀,得到粘性溶浆;再加入铜盐、锌盐中的至少一种,搅拌均匀,制得抗菌溶浆;
2)将玻璃基片进行清洗,去除所述玻璃基片表面的污垢;
3)在清洗后的玻璃基片表面涂覆所述抗菌溶浆,形成一层抗菌膜;
4)将覆有抗菌膜的玻璃进行钢化处理、清洗,得到建筑抗菌玻璃。
2.根据权利要求1所述的一种建筑抗菌玻璃的生产工艺,其特征在于:步骤1)中所述粘性溶浆中所述粘结剂的质量比例为3-7%;所述铜盐、锌盐为硫酸盐或硝酸盐;所述抗菌溶浆中铜盐比例为0.01-0.2wt%,锌盐比例为0.1-0.5wt%。
3.根据权利要求1所述的一种建筑抗菌玻璃的生产工艺,其特征在于:所述粘结剂的制备方法,包括以下步骤:
(1)所述粘结剂的制备原料由以下组成:5-20wt%淀粉、2-10wt%无水乙醇、0.5-1.0wt%氢氧化钠、余量为纯水;
(2)将步骤1)的制备原料混合均匀,然后加热煮沸至透明糊状,最后烘干;
(3)将步骤2)得到的烘干物粉碎后用球磨机球磨,细度≤100um,即得所述粘结剂。
4.根据权利要求1所述的一种建筑抗菌玻璃的生产工艺,其特征在于:步骤2)中所述玻璃基片为钠钙玻璃。
5.根据权利要求1所述的一种建筑抗菌玻璃的生产工艺,其特征在于:步骤3)所述涂覆的工艺为浸涂、喷涂、刷涂、辊涂中的一种,涂覆量控制在30-60g/m2。
6.根据权利要求1所述的一种建筑抗菌玻璃的生产工艺,其特征在于:步骤4)所述建筑抗菌玻璃,表面铜离子≥0.003wt%,锌离子≥0.006wt%,且铜离子≤锌离子,0.009wt%≤铜离子+锌离子≤0.03wt%;抗菌活性值R≥2,透过率T>85%,b值小于1.0。
7.根据权利要求1所述的一种建筑抗菌玻璃的生产工艺,其特征在于:步骤4)中所述钢化处理包括如下步骤:
A.将覆有抗菌膜的玻璃进行热处理;
B.对热处理玻璃进行冷却降温处理。
8.根据权利要求7所述的一种建筑抗菌玻璃的生产工艺,其特征在于:步骤A)中所述热处理的温度为600-750℃,热处理的时间2-20min。
9.根据权利要求7所述的一种建筑抗菌玻璃的生产工艺,其特征在于:步骤B)中所述冷却降温处理的条件为冷风温度5-30℃,冷却时间0.5-8min。
10.根据权利要求1所述的一种建筑抗菌玻璃的生产工艺,其特征在于:步骤4)中所述清洗,采用清水冲洗表面残留的抗菌溶浆,晾干即获得洁净的玻璃。
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