蚕丝脱胶废水的丝胶回收技术.pdf

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1、印染(2013No．9)。‘。。。‘。‘6述评2蚕丝脱胶废水的丝胶回收技术．o．o．o．o‘赵晓晶，张克勤(现代丝绸国家工程实验室，纺织与服装工程学院，苏州大学，江苏苏州215123)摘要：丝胶位于蚕丝外层，是一种水溶性球状蛋白，具有丝胶I、Ⅱ、Ⅲ、Ⅳ层状分布的特点；其二级构象以无规卷曲和B一折叠结构为主，几乎不含0【一螺旋结构，其分子质量主要分布在10—100kDa，且随脱胶方法的不同而异。丝胶具有胶体的性质，等电点为3．8—4．5，在一定湿热条件下会发生变性或变质。丝胶在化妆品、功能材料、食品添加剂等领域均具有良好应用前景，文中介绍了目前制丝废水中丝胶主要的化

2、学和物理回收方法。化学法包括酸析法、有机溶剂法、化学混凝法、离子交换回收法；物理法包括离心法、冰冻法和超滤法，通过综合比较，提出一种新的丝胶回收方法。关键词：废水处理；丝胶蛋白；丝胶回收；酸析；超滤；电凝胶中图分类号：'IS199文献标识码：A文章编号：1000—4017(2013)09—0049—06RecoverytechnoloesofsericinfromsilkdegummingwastewaterZHAOXiao-jing。ZHANGKe-qin(NationalEngineeringLaboratoryforModernSilk，CollegeofT

3、extileandClothingEngineering。SoochowUnive~ity，Suzhou215123。China)Abstract：Sericinisaglobularproteinwrappedinsilkstrands-andiswater—solubleviaasoapdegummingprocess．Organicwastewatercontaininghighlyconcentratedsericinisformedduringthisprocess．Iftheorganicwastewaterisdischargedintorivers

4、andotherbodiesofwater，itposesseriousthreatinpollutingthesurroundingecologicalsystem．However，sericinitselfiSavaluablenaturalresourcewithwideapplicationsintheareasofcosmetics。clinicalmedicines。biomaterialsandfinishingprocessonhealthcaretextiles．Therefore。itisverycriticaltodeveloptechniq

5、uestorecoversericincontainedinthewastewaterofsilkdegumming．SericinhasnaturallamInarstructuresfrOmsericinItOIVonthesilk．ThesecondarystructuresofsericinconsistofrandomcoilsandBsheetalmostwithoutthe-Helixstructure．ItsmolecularweightwidelyrangesfrOma-bout10to100kDa，dependingonthedegumming

6、method．Thesericinproteinpossessescharacteristicsofcolloidalparticleswithisoelectricpointsof3．8～4．5，andmaydeteriorateordenatureunderthecertainhumidandhigh—temperatureconditions．ThisreviewsummarizesthemainmethodsofsericinrecoveryfrOmwastewater．Themethodsarebasedonchemicalandphysicalprin

7、ciplesandincludeacidicprecipitation。organicsolventprecipitation，chemicalcoagulation，ionexchangemethod，centrifugation．thefreeze-methodandtheultrafiltrationmethod．AnoveImethodbasedoncurrentresearchiSalsoproposed．Keywords：wastewatertreatment；sericinprotein；sericinrecovery；acidicprecipita

8、tion；