首页 | 本学科首页   官方微博 | 高级检索  
相似文献
 共查询到20条相似文献,搜索用时 62 毫秒
1.
棉织物复合酶前处理工艺   总被引:1,自引:0,他引:1  
以多种酶制剂及其它助剂复配的退浆煮练剂SZ-101和氧漂促进剂SZ-102,对棉织物进行退煮漂前处理,确定了优化工艺:坯布一轧退浆煮练液汽蒸(退浆煮练剂SZ-101 4~6g/L,pH值6~7,轧余率100%,80℃汽蒸40 min)→轧漂白液汽蒸(H22O2 6~9 g/L,氧漂促进剂SZ-102 10~15g/L,Na2SiO3 5 g/L,pH值10~11,轧余率100%,98℃汽蒸50 min)→水洗.该工艺的前处理效果与传统碱前处理效果相近,且可节水节汽40%左右,污水近中性,COD低,色度浅,可达到排放要求.  相似文献   

2.
李锦华 《印染》2010,36(24)
采用新型环保高效前处理剂卜公茶皂素2#对纯棉缎条织物进行退煮漂一浴前处理。采用正交试验得到优化的应用工艺:茶皂素40 g/L,H2O210 g/L,NaOH 10 g/L,汽蒸时间45 min。处理棉织物的白度可达78.86%,毛效为6.8 cm/30 min,强力损失相对较小。  相似文献   

3.
采用改性茶皂素对棉织物进行退煮漂一浴法前处理,探讨改性茶皂素用量、前处理温度、处理时间和烧碱用量对退浆和漂白效果的影响,并与常规退煮-漂二浴法工艺进行比较。结果表明,优化的改性茶皂素一浴法退煮漂工艺为,茶皂素用量40 g/L,98℃浸渍处理40 min,处理织物可达到与常规工艺相近的效果。  相似文献   

4.
研究了4种双氧水活化剂在酶氧一浴前处理中的应用效果,结果表明:采用TAED效果较好.酶氧一浴可以降低碱的用量,减轻污水处理的负担.其应用工艺为:坯布浸轧第1工作液(二浸二轧,轧余率90%~100%,工作液温度50~55℃)→打卷堆置(50℃,12 h)→浸轧第2工作液(二浸二轧,轧余率90%~100%,工作液温度40℃)→汽蒸(80℃,10 min)→水洗→烘干.第1工作液:KDN精练酶2g/L,低温精练渗透剂GR-01 10 g/L,双氧水36 m L/L,活化剂18 g/L,p H=8.第2工作液:低温精练渗透剂GR-01 10 g/L,双氧水44 m L/L,活化剂22 g/L,p H=8~9.  相似文献   

5.
采用精练酶881和去蜡剂对纯棉厚重织物纱卡进行退、煮、漂一浴法处理,探讨了精练酶881用量、去蜡剂用量、双氧水用量、汽蒸时间和稳定剂硅酸钠用量对处理后棉织物性能的影响。通过试验得出最佳工艺条件为:精练酶881用量25 g/L,去蜡剂8 mL/L,双氧水12 mL/L,硅酸钠8 g/L,在100 ℃条件下汽蒸60 min。精练酶881一浴法前处理工艺简单,对纤维损伤小,处理后的棉织物各项性能指标均优于常规法前处理工艺。  相似文献   

6.
茶皂素JT-S009含有纳米TiO2,茶皂素和甲壳糖等,可代替烧碱和精练酶用于棉织物前处理.优化的茶皂素前处理工艺为:茶皂素JT-S009 30 g/L,H2O210 g/L,精练剂TF-125T 4 g/L,水玻璃4 g/L,汽蒸时间45~60 min.结果表明,经茶皂素工艺处理后,棉织物白度和毛效较烧碱煮漂工艺和酶氧工艺好,强力损失在可控范围内.茶皂素工艺操作简便,工艺流程短,在生态环保等方面具有一定优势.  相似文献   

7.
尚润玲 《印染》2015,(7):21-24
采用复合茶皂素对竹纤维织物进行前处理,分析了各因素对竹纤维织物前处理效果的影响。茶皂素浸渍一浴法优化工艺为:茶皂素35 g/L,时间50 min,温度100℃;轧蒸法优化工艺为:茶皂素45 g/L,汽蒸时间45 min。结果表明,茶皂素前处理可获得白度稳定、毛效好、强力损伤小的产品,且工艺简捷,污染少。  相似文献   

8.
棉织物生物酶冷轧堆前处理工艺研究   总被引:4,自引:2,他引:4  
纪惠军  范雪荣 《印染》2005,31(7):1-4
利用生物酶的专一性、高效性、处理条件的温和性和环境保护等优点,采用冷轧堆退煮一浴再氧漂的两步法前处理工艺,对六种纯棉织物的生物酶冷轧堆前处理进行了研究。结果表明,某些品种的纯棉织物采用生物酶冷轧堆前处理工艺,可以达到传统的前处理效果。酶轧堆退煮处方为L-2000淀粉酶2g/L,Bipprep 3000L果胶酶0.5g/L,尿素5~10g/L,渗透剂TX2~4g/L,堆置时间为4~8h;漂白工艺中,H2O2 20~25g/L,渗透剂TX3g/L和TL3g/L混用,98—100℃汽蒸60min。  相似文献   

9.
《印染》2015,(7)
采用复合茶皂素对竹纤维织物进行前处理,分析了各因素对竹纤维织物前处理效果的影响。茶皂素浸渍一浴法优化工艺为:茶皂素35 g/L,时间50 min,温度100℃;轧蒸法优化工艺为:茶皂素45 g/L,汽蒸时间45 min。结果表明,茶皂素前处理可获得白度稳定、毛效好、强力损伤小的产品,且工艺简捷,污染少。  相似文献   

10.
申学锋  吕江龙 《印染》2022,(7):25-28+44
针对全棉织物常规连续前处理工艺流程长、污染大、能耗高、污水处理成本高的问题,提出并开发一种新型低温煮漂一浴短流程前处理工艺,讨论了各种助剂用量及处理时间对处理效果的影响。根据织物白度、毛效、强力等指标,优化了低温煮漂一浴工艺。优化的低温煮漂一浴工艺为:烧碱6 g/L、双氧水(100%)15 g/L、强力精练剂CP-2G10 g/L、氧漂稳定剂HOC 15 g/L、裂解剂HSM 2 g/L,汽蒸条件80℃×45 min。经优化的低温煮漂一浴工艺处理后,布面效果可接近常规工艺的水平,同时大幅减少了能源消耗及污水中COD值、氨氮和磷含量。  相似文献   

11.
Since grapevine ( Vitis spp .) rootstock material is being traded increasingly as disbudded woody material a lack of distinctive morphological features on such material necessitates an alternative and reliable means of identification. Methods described here were developed for rapid and efficient extraction of DNA from woody samples rich in phenolic compounds and polysaccharides, and for subsequent identification of varieties by RAPD PCR. Using these methods, and with the application of only one selected RAPD primer, we were able to differentiate sixteen rootstock varieties, including the seven varieties most commonly used in Germany. Problems commonly encountered with reproducibility of RAPD patterns were avoided by choosing primers with a dinucleotide sequence and a high G/C content that allowed a rather high annealing temperature of 45°C. Methods described here should also be useful for other horticultural crops, especially those with woody tissues rich in phenolic compounds and polysaccharides.  相似文献   

12.
An internet website (http://cpf.jrc.it/smt/) has been produced as a means of dissemination of methods of analysis and supporting spectroscopic information on monomers and additives used for food contact materials (principally packaging). The site which is aimed primarily at assisting food control laboratories in the European Union contains analytical information on monomers, starting substances and additives used in the manufacture of plastics materials. A searchable index is provided giving PM and CAS numbers for each of 255 substances. For each substance a data sheet gives regulatory information, chemical structures, physico-chemical information and background information on the use of the substance in particular plastics, and the food packaging applications. For monomers and starting substances (155 compounds) the infra-red and mass spectra are provided, and for additives (100 compounds); additionally proton NMR are available for about 50% of the entries. Where analytical methods have been developed for determining these substances as residual amounts in plastics or as trace amounts in food simulants these methods are also on the website. All information is provided in portable document file (PDF) format which means that high quality copies can be readily printed, using freely available Adobe Acrobat Reader software. The website will in future be maintained and up-dated by the European Commission's Joint Research Centre (JRC) as new substances are authorized for use by the European Commission (DG-ENTR formerly DGIII). Where analytical laboratories (food control or other) require reference substances these can be obtained free-ofcharge from a reference collection housed at the JRC and maintained in conjunction with this website compendium.  相似文献   

13.
The characterization of the aromatic profile of several apricot cultivars with molecular tracers in order to obtain objective data concerning the aromatic quality of this fruit was undertaken using headspace–solid phase microextraction (HS–SPME). Six apricot cultivars were selected according to their organoleptic characteristics: Iranien, Orangered, Goldrich, Hargrand, Rouge du Roussillon and A4025. The aromatic intensity of these varieties measured by HS–SPME–Olfactometry were defined and classified according to the presence and the intensity of grassy, fruity and apricot like notes. In the six varieties, 23 common volatile compounds were identified by HS–SPME–GC–MS. Finally, 10 compounds, ethyl acetate, hexyl acetate, limonene, β-cyclocitral, γ-decalactone, 6-methyl-5-hepten-2-one, linalool, β-ionone, menthone and (E)-hexen-2-al were recognized by HS–SPME–GC–O as responsible of the aromatic notes involved in apricot aroma and considered as molecular tracers of apricot aromatic quality which could be utilized to discriminate apricot varieties.  相似文献   

14.
The advent of the functional barrier concept in food packaging has brought with it a requirement for fast tests of permeation through potential barrier materials. In such tests it would be convenient for both foodstuffs and materials below the functional barrier (sub-barrier materials) to be represented by standard simulants. By means of inverse gas chromatography, liquid paraffin spiked with appropriate permeants was considered as a potential simulant of sub-barrier materials based on polypropylene (PP) or similar polyolefins. Experiments were performed to characterize the kinetics of the permeation of low molecular weight model permeants (octene, toluene and isopropanol) from liquid paraffin, through a surrogate potential functional barrier (25 μm-thick oriented PP) into the food simulants olive oil and 3% (w/v) acetic acid. These permeation results were interpreted in terms of three permeation kinetic models regarding the solubility of a particular model permeant in the post-barrier medium (i.e. the food simulant). The results obtained justify the development and evaluation of liquid sub-barrier simulants that would allow flexible yet rigorous testing of new laminated multilayer packaging materials.  相似文献   

15.
BADGE.2HCl and BFDGE.2HCl were determined in 28 samples of ready-to-drink canned coffee and 18 samples of canned vegetables (10 corn, 5 tomatoes and 3 others), all from the Japanese market. HPLC was used as the principal analytical method and GCMS for confirmation of relevant LC fractions. BADGE.2HCl was found to be present in one canned coffee and five samples of corn, BFDGE.2HCl in four samples of canned tomatoes and in one canned corn. No sample was found which exceeded the 1mg/kg limit of the EU for the BADGE chlorohydrins. However the highest concentration was found for the sum of BFDGE.2HCl and BFDGE.HCl.H2O at a level of 1.5mg/kg. A Beilstein test confirmed that all cans containing foods contaminated with BADGE.2HCl or BFDGE.2HCl had at lest one part coated with a PVC organosol.  相似文献   

16.
17.
A strong science base is required to underpin the planning and decision-making process involved in determining future European community legislation on materials and articles in contact with food. Significant progress has been made in the past 5 years in European funded work in this area, with many developments contributing to a much better understanding of the migration process, and better and simpler approaches to food control. In this paper this progress is reviewed against previously identified work-areas (identified in 1994) and conclusions are reached about future requirements for R&D to support legislation on food contact materials and articles over the next 5 or so years.  相似文献   

18.
19.
This paper describes the second part of a project undertaken to develop certified mussel reference materials for paralytic shellfish poisoning toxins. In the first part two interlaboratory studies were undertaken to investigate the performance of the analytical methodology for several PSP toxins, in particular saxitoxin and decarbamoyl-saxitoxin in lyophilized mussels, and to set criteria for the acceptance of results to be applied during the certification exercise. Fifteen laboratories participated in this certification study and were asked to measure saxitoxin and decarbamoyl-saxitoxin in rehydrated lyophilized mussel material and in a saxitoxin-enriched mussel material. The participants were allowed to use a method of their choice but with an extraction procedure to be strictly followed. The study included extra experiments to verify the detection limits for both saxitoxin and decarbamoyl-saxitoxin. Most participants (13 of 15) were able to meet all the criteria set for the certification study. Results for saxitoxin.2HCl yielded a certified mass fraction of <0.07 mg/kg in the rehydrated lyophilized mussels. Results obtained for decarbamoyl-saxitoxin.2HCl yielded a certified mass fraction of 1.59+/-0.20 mg/kg. The results for saxitoxin.2HCl in enriched blank mussel yielded a certified mass fraction of 0.48 +/- 0.06 mg/kg. These certified reference materials for paralytic shellfish poisoning toxins in lyophilized mussel material are the first available for laboratories to test their method for accuracy and performance.  相似文献   

20.
<正>We are pleased to announce the launch of a new international peer-reviewed journal-Food Science and Human Wellness,ISSN 2213-4530,which is an open access journal,produced and hosted by Elsevier B.V.on behalf of Beijing Academy of Food Sciences.Food Science and Human Wellness is an international peer-reviewed English journal that provides a forum for the dissemination of the  相似文献   

设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号