New Nano Polymer Materials for Composite Exterior-Wall Coatings

A triethylenetetramine epoxy mixture was synthesized through the reaction of a low-molecular-weight liquid epoxy resin with triethylenetetramine(TETA).Then triethyltetramine(TETA)was injected dropwise into a pro-pylene glycol methyl ether(PM)solution for chain extension reaction.A hydrophilic andflexible polyether seg-ment was introduced into the hardener molecule.The effects of TETA/DGEPG,reaction temperature and reaction time on the epoxy conversion of polyethylene glycol diglycidyl ether(DGEPG)were studied.In addition,several alternate strategies to add epoxy resin to the high-speed dispersion machine and synthesize MEA DGEBA adduct(without catalyst and with bisphenol A diglycidyl ether epoxy resin)were compared.It was found that the higher the molecular weight of triethylenetetramine,the longer the chain segment of the surface active molecule.When the equivalence ratio of amine hydrogen and epoxy group is low,the stability of lotion is good.When the ratio of amine hydrogen to epoxy group is large,the content of triethylenetetramine is small.The main objective of this study is the provision of new data and knowledge for the development of new materials in the coating and electronic industry.

Structure, properties and application to water-soluble coatings of complex antimicrobial agent Ag-carboxymethyl chitosan-thiabendazole

The structure, properties and application to water-soluble coatings of a new complex antimicrobial agent Ag-carboxylmethyl citosan-thiabendazole （Ag-CMCTS-TBZ） prepared from different materiel ratios were reported. The silver ions were preferably coordinated with the free-NH2 groups and the -OH groups of secondary alcohol and carboxyl in CMCTS. TBZ preferably bonded to carboxyl group in CMCTS by electrostatic force and hydrogen bonding. Increase in silver ions content in the complex agent improved to some limited extent the antibacterial activity, but enhanced coloring and cost of the complex agent. Increase in TBZ content resulted in increase of antifungal activity, but decrease of water solubility of the complex agent. The antimicrobial MICs of the complex agent to Esherichia coil, Staphylococcus aureus, Candida albicans, Aspergillus niger, Mucor sp. were 20 -80, 15 -60, 20 - 55, 40 - 250, and 400 - 1700 mg/kg, respectively. Addition of 0.1% of this complex agent to acrylic emulsion paint made the paint without substantial change in color, luster, viscosity, odor or pH value, but with an excellent and chronically persisting broad-spectra antimicrobial activity.

Double-layer Modifi cation of Water-based Aluminum with SiO2 and Polyacrylic Acid by Solgel Process and in situ Polymerization

A double-layer aluminum consisting of an aluminum core and a shellof SiO2 and polyacrylic acid was synthesized.This modified aluminum was used to improve the corrosion resistance and dispersive property of aluminum in waterborne media.TEM,FTIR,XPS,and EDX determination showed that PAA and SiO2 were coated on the surface of aluminum.Evolved hydrogen detection showed that the corrosion resistance of composite particle had been markedly improved.Maximum corrosion inhibition efficiency of SiO2 coated aluminum（SiO2@Al）was 95.1% while that of double-layer coated aluminum（PAA/SiO2@Al）was 98.8%.Meanwhile,polyacrylic acid layer improved the agglomeration of aluminum significantly.According to the dispersibility test,the particle size of 50% volume fraction [d（0.5）] of aluminum,SiO2@Aland PAA/SiO2@Alwere 42,53,and 34 μm,respectively.

分层涂布冷冻干燥工艺改善面膜中的咖啡因经皮透过

为了改善面膜中咖啡因的经皮透过率,采用Hunter和星点设计-响应面法优化分层涂布冷冻干燥的关键工艺参数,并应用预测刻画器和设计空间确定工艺参数的可接受范围和最优值。确定涂布方式和涂布层数对咖啡因经皮透过有显著影响,涂布方式选择先涂布辅料基质,再涂布活性成分咖啡因。涂布层数、层厚和涂布速度的可接受范围:2~4层,0.5~1.2 mm和1~5 m/min,而3个参数的最优值分别为3层、0.5 mm和3 m/min。优化工艺后制备的3批面膜中咖啡因20 min透过率均超过10%。因此,优化后的分层涂布冷冻干燥工艺可大幅度提高面膜中咖啡因的经皮透过率。

复方黄柏液涂剂联合CO2激光治疗面部痤疮的效果

目的分析复方黄柏液涂剂联合CO2激光治疗面部痤疮的临床效果。方法随机选取120例面部痤疮患者为研究对象,根据不同治疗方案将其分为观察组、对照A组和对照B组,各40例,观察组用复方黄柏液涂剂联合CO2激光治疗,对照A组单纯使用CO2激光治疗,对照B组用复方黄柏液涂剂治疗。比较三组的临床疗效、复发情况及患者满意度。结果观察组的治疗总有效率显著高于对照A组和对照B组,差异具有统计学意义(P<0.05);对照A组与对照B组的治疗总有效率比较,差异不具有统计学意义(P>0.05)。观察组的复发率显著低于对照A组和对照B组,差异具有统计学意义(P<0.05);对照A组与对照B组的复发率比较,差异不具有统计学意义(P>0.05)。观察组的满意度显著高于对照A组和对照B组,差异具有统计学意义(P<0.05);对照A组与对照B组的满意度比较,差异不具有统计学意义(P>0.05)。结论复方黄柏液涂剂联合CO2激光治疗面部痤疮效果显著,值得在临床中推广应用。

氟涂料在塑料制品表面防护的研究进展

本文综述了有机氟树脂的结构特点及其性能，对氟涂料在塑料制品领域的表面防护应用做了详细的介绍，同时展望了氟涂料在塑料制品领域的应用前景。

ALB铝膜丁基自粘防水卷材光热反射性能的研究

通过模拟试验探究不同防水卷材铺设于混凝土屋面或金属屋面时的光热反射性能差异,根据被测部位的温度差得出不同防水卷材的反射光热效果,为屋面防水工程中合理选用防水卷材提供依据。结果表明,在高温天气下,ALB铝膜丁基自粘防水卷材的光热反射性能相对较好,其次是涂刷水性表面涂料的黑色防水卷材,再次是黑色卷材。

Effect of Polymer Inclusion in Preparation of Thick LZO Buffer Layers for YBCO Coated Conductors

In this work, water-based precursor solutions suitable for dip-coating of thick La2Zr2O7 （LZO） buffer layers for coated conductors on Ni-5%W substrates with an inclusion of polymeric polyvinyl pyrrolidone were developed. The effect of varying percentage of the polymer addition on the preparation of the deposited films with maximum crack-free thickness was investigated. This novel water-based chemical solution deposition method involving polymers in two different chelate-chemistry compositions revealed the possibility to grow single, crack-free layers with thicknesses ranging from 140 to 280 nm, with good crystallinity and epitaxial growth. The effect of increasing polymer concentrations on the morphology and the structure of the films was studied. The appropriate buffer layer action of the films in preventing Ni diffusion was studied by X-ray photoelectron spectroscopy.

Comparison of Three External Wet Compress Methods in The Treatment of Facial Hormone Dependent Dermatitis

Objective:To compare the therapeutic effects of three different external wet compress methods on facial hormone dependent dermatitis(FCAD),and to provide reference for clinical treatment of FCAD.Methods:From June 2016 to June 2019,160 FCAD patients in our dermatology clinic were selected and divided into three groups according to random number table:the first group was treated with Compound Cortex Phellodendri liquid coating,the second group was treated with collagen paste dressing,and the third group was treated with 0.9%sodium chloride injection solution.Apply 8 layers of gauze or cold compress directly to the skin lesions for 4 weeks in each group.Results:After 4 weeks of treatment,no adverse reactions were found.The effective rates of the first group,the second group,and the third group were 72.22%,62.26%and 41.51%,respectively.Compared with the third group,the effective rate of the first group and the second group was significantly higher,and there was statistical significance between the groups(x2=10.294,x2=4.573,P<0.05);but there was no significant statistical difference between the first group and the second group(x2=1.205,P>0.05).Conclusion:Compound Cortex Phellodendri coating is suitable for FCAD patients with severe inflammation,collagen paste dressing is suitable for FCAD patients with mild to moderate inflammatory reaction and pigmentation,and 0.9%sodium chloride injection is suitable for patients with mild facial flushing and swelling.Clinical treatment should be selected according to the patient's condition and rash characteristics.

甘草酸二铵肠溶胶囊致面部浮肿1例

文中报道了使用甘草酸二铵肠溶胶囊致面部浮肿的1例病例,提醒我们必须关注此药的不良反应,严格控制其适应症、用量及疗程。

医用生物组织胶水点涂法、分解法和胶线结合法对位黏合急诊面部创伤伤口的临床效果

目的分析医用生物组织胶水点涂法、分解法和胶线结合法对位黏合急诊面部创伤伤口的临床效果。 方法选择医院115例面部创伤患者作为研究对象，115例均为单纯缝线缝合或单纯组织胶水手法未能解剖复位。通过医用生物组织胶水分解法、点涂法与胶线结合法对其面部创伤进行对位黏合，并评价其疗效和安全性。 结果115例患者治疗后均能解剖对位黏合，其中1例（0.87%）患者发生创面感染，其余患者均无开裂、感染等并发症。 结论医用生物组织胶水点涂法、分解法和胶线结合法对位黏合急诊面部创伤伤口能够取得良好的临床疗效，且其并发症发生率较低，安全性较高，术后美观、可靠，效果满意，值得临床推广。

三种外用湿敷方法治疗面部激素依赖性皮炎的疗效比较

目的比较三种不同外用湿敷治疗方法对面部激素依赖性皮炎(FCAD)的治疗效果,为FCAD临床治疗方法的选择提供参考.方法选取2016年6月-2019年6月期间我院皮肤科门诊收治的FCAD患者160名,按照随机数字表法将其分为三组:治疗一组应用复方黄柏液涂剂,治疗二组应用胶原蛋白贴敷料,治疗三组应用0.9%氯化钠注射液.各组用8层纱布或者直接冷敷于皮损处,治疗4周,比较各组的治疗有效率.结果经过4周治疗,未发现不良反应病例.治疗一组、治疗二组、治疗三组的有效率分别为72.22%,62.26%、41.51%.与治疗三组相比,治疗一组和治疗二组的有效率明显偏高,组间比较有统计学意义(x^(2)=10.294、x^(2)=4.573,P均<0.05);而治疗一组和治疗二组间比较,有效率无明显统计学差异(x^(2)=1.205,P>0.05).结论复方黄柏涂剂适用于炎症重的FCAD患者,胶原蛋白贴敷料适用于伴轻中度炎症反应、色素沉着的FCAD患者,0.9%氯化钠注射液适用于面部潮红、肿胀的轻症患者.临床应根据患者病情的轻重缓急和皮疹特点来选择治疗方案.