Study on Synthesis and Chloramphenicol Release of Poly（2-hydroxyethylmethacrylate-co-acrylamide） Hydrogels

In this article, poly（2-hydroxyethylmethacrylate-co-acrylamide） hydrogels were synthesized by bulk free-radical copolymerization of 2-hydroxyethylmethacrylate （HEMA） and acrylamide （AAm） for soft contact lens（SCL）-based ophthalmic drug delivery system. The copolymer was characterized with FT-IR and SEM, the swelling property of the hydrogels were studied by gravimetrical method, and chloramphenicol was used as a model drug to investigate drug release profile of the hydrogels. The results showed that poly（2-hydroxyethylmethacrylateco-acrylamide） hydrogels were transparent and useful SCL biomaterial, the water content increased as AAm content increase and pH decrease, and in the same way, hydrogel composition affected chloramphenicol release process too. Migration rate of chloramphenicol increased as the AAm content in the hydrogels increased in the first stage of diffusion process, whereas there was no significant difference thereafter.     

Domestic News

Financial Reports of Domestic Listed Enterprises in First Half Year
Double Coin Group： Revenue Slightly Declining On August 28, Double Coin Holdings Ltd. released 2014 Semi-annual Report. Data displays that the realized revenue is 7 Billion Yuan, with a slight year-on-year （same below） decline; thereinto the revenue of tire products is 6.290 Billion Yuan with an increase of 1.29%. The realized net profit of tire products is 0.167 Billion Yuan with an increase of 2.63%. The sales revenue and profit of all-steel cord truck radial tire still are dominant.     

New Automatic Two-stage Semi-steel Tire Moulding Machine Published in Beijing Jingyie

正On August 27,a"Innovative,Reliable and Efficient"product presentation was held in Beijing by Beijing Jingyie Mechanical Equipment Co.,Ltd.to release a new automatic two-stage semi-steel radial tire moulding machine to tire enterprises at home and abroad.This equipment is characterized by complete automation and high efficiency.For example,its cycling time of single tire is only 28s;only one operator is enough for the whole production process;and the production for every     

Slightly Changes-and Renovation Created Benefits

On the first half year of 2007, Shandong SanGong Rubber Co., Ltd. took each form to mobilize the staff＇s enthusiasm and exerted the staff＇s intelligence and ability to create benefits for the company from saving. For example, the electric control department of this company organized personnel to make technical reforming to 660 sheeting mill, which saved 14,000 Yuan of expense. The No.1 workshop of bias tire factory mounted a transducer against the condition that the fan would be continuously working in a long time, so when the fault is occurred on the equipment,     

A New Product of Forming Machines of Guilin Rubber Machinery Co., Ltd. Stepped out of China for the First Time

<正>On March 6,the drum-type band engineering tire forming machine independently developed by Guilin Rubber Machinery Co.,Ltd.passed the trial run successfully and stepped out of China for the first time,which will be packaged and delivered to some famous tire enterprises in Southeast Asian countries in the near future.The equipment is 24m long,13m wide and 4m     

Double Star＇s Green TPR Passenger Car Tire Comes to Market

On August 18,Double Star Dongfeng Tire Company performed the ceremony for the appearance of"Genew"green TPR passenger car tire on the market,first put on the taxi market with strict demand for tire and complex road condition.According to the appraisal of experts,Double Star green TPR passenger car tire is China’s first green TPR tire and it conquers two major technical problems of"abrasion resistance and static"in the     

Growth and Corrosion Characteristics of Plasma Electrolytic Oxidation Ceramic Films Formed on AZ31 Magnesium Alloy

The growth characteristics of oxide ceramic films formed on AZ31 magnesium alloy with plasma electrolytic oxidation (PEO) technique in alkaline silicate solution were investigated. The composition, structure and morphology of the coatings were detected by energy dispersive X-ray spectroscope and scanning electron microscope. The amount of dissolved magnesium in the electrolytes during PEO process was measured by atomic absorption spectrometry. The results indicated that the growth process of PEO films had three stages when applied with constant voltage mode. In the first stage, the growth rate of PEO films was low, and concentrations of elements O, Mg and Si varied slightly. After sparking occurred (the second stage), the PEO films showed higher growth rate due to the high transfer rate of ions and electrons, and the existence of plasma reactions. When the growth rate tended to maintain stable with time, the third stage happened. PEO films exhibited different uniform and pitting-corrosion characteristics in different reaction stages. The films formed at 300 V for 30 min performed best corrosion resistance and the phase of ceramic films was mainly composed of MgSiO3 and forsterite Mg2SiO4.     

Selective hydrolysis of lignocelluloses from corn stalk in an ionic liquid

Although lots of basic studies , such as the hydrolysis and dissolution of lignocelluloses has made great progress in recent years , the hydrolysates containing complex mixture of pentose and hexose are very hard to be separated , and these process sometimes cause serious environmental problems in practical application of cellulose polymer degradation science.Herein , an efficient two-stage method for selective hydrolysis of lignocelluloses biomass is being developed in this paper by controlling of pH in an ionic liquid.The lignin-hemicelluloses matrix in corn stalk was hydrolyzed into xylose in 23.1% yield in the first stage ; and cellulose-rich residues from the first stage was by farther hydrolyzed to provide a glucose in 26.9%yield.Structure of the products were identified by 13 C NMR.It should be mentioned that , the ionic liquid which can be regenerated and reused throughout the process. The present work significantly opens an a new path to utilize each component of lignocellulose as raw materials producing biofuels , renewable energy and fine chemicals.     

废轮胎二氧化碳活化借助析因设计的系统分析(英文)

In this study,waste tire was used as raw material for the production of activated carbons through pyrolysis.Tire char was first produced by carbonization at 550℃ under nitrogen.A two factorial design was used to optimize the production of activated carbon from tire char.The effects of several factors controlling the activation process,such as temperature(850-950 ℃),time(2-6 h) and percentage of carbon dioxide(70%-100%) were investigated.The production was described mathematically as a function of these three factors.First order modeling equations were developed for surface area,yield and mesopore volume.It was concluded that the yield,BET surface area and mesopore volume of activated carbon were most sensitive to activation temperature and time while percentage of carbon dioxide in the activation gas was a less significant factor.     

高速滚动子午线轮胎变形和接地印痕预测方法

In this research，the tire deformations due to rotation are divided into three parts：tread，belt and carcass.Tread deformation is obtained by using a rotating hollow cylinder model，belt expansion is calculated according to the laminated composite shell theory，and a formula of dynamic equilibrium profile is built to investigate carcass deformation.Moreover，a simple method is used to predict the footprint changes caused by tire deformation.Results show that a large deformation is occurring at tire shoulder，a smaller one at tread centre，and the shoulder deformations are mostly caused by carcass.Length of footprint side edges increases with tire rolling speed increasing.The predicted tread，belt，carcass deformations and footprint changes are in good agreement with finite element analysis（FEA） results.The proposed method and the results will offer a helpful guidance to tire and vehicle engineers.     

载重子午胎实验密炼机的开发研制

介绍了青岛科技大学开发研制的国家“十五”重大技术装备研制项目之一——载重子午胎实验密炼机的主要技术参数、性能指标、结构和工艺特点。整机结构新颖、技术先进、性能优良，用户反应良好。     

航空生物燃料技术发展背景与应用现状

论述了航空生物燃料技术发展背景、技术开发与应用现状,指出能否提供可持续的原料是航空生物燃料应用的关键问题,航空生物燃料将成为我国航空业实现温室气体减排目标的突破口和根本途径;同时为我国航空生物燃料发展提出了建议,认为应继续加大技术研发,通过技术创新不断降低航空生物燃料成本,同时努力扩大航空生物燃料原料来源,积极推动航空生物燃料的工业化生产与应用,为我国航空业的可持续发展和碳减排创造条件。     

我国轮胎工业40年发展的真实写照与缩影 ——纪念《轮胎工业》创刊40周年

结合《轮胎工业》创刊40年来的报道内容,综述我国轮胎工业40年来的发展历程。我国轮胎生产从最初的使用棉帘线、天然橡胶生产斜交轮胎,通过不断的技术攻关,逐步发展到生产子午线轮胎、无内胎轮胎、扁平化轮胎,进而到航空轮胎、绿色轮胎、安全轮胎、智能轮胎,每一步发展都包含着大量科技创新和自主知识产权。发展民用航空子午线轮胎、新能源汽车轮胎、免充气轮胎等生产技术是“十四五”的发展重点。     

汽车塑料件成型加工技术的分析研究

塑料化是现代汽车科技进步的发展方向。塑料件成型技术与汽车塑料化无缝结合起来,创新创造成型技术,推动汽车塑料化的进程,这是汽车工程重要的应用技术开发。现代先进的塑料成型新设备、新技术、新工艺,几乎都与汽车塑料化有密切的联系。本文对汽车有关几种塑料件成型新技术的分析研究,说明汽车塑料化技术进步离不开塑料成型技术的创新创造,同时推动了塑料成型技术的创新创造。汽车塑料件成型加工新技术的研发,以终端制品发展的新功能、新特点为出发点,把制品研发,塑料原料的研发、设备研发、成型工艺研发等作在线无缝结合一条龙开发。     

国内外大型注塑机技术发展动态综述

随着现代生产生活中航天、汽车、国防及医疗等领域对大型注塑制品应用需求的增长,高效、节能、智能的大型注塑机设备及其制造技术迅速发展。本文介绍了现阶段国内外大型注塑机的发展概况,以合模装置为主线总结了大型注塑机在轻量化方向的发展历程,以动力驱动系统为主线介绍了大型注塑机在节能化方向的发展情况,并结合工业4.0的发展环境总结了智能注塑的发展趋势。     

网带烘干在氨基模模塑粉生产中应用研究

本文简要介绍了氨基模模塑粉的发展概况,阐述了氨基模模塑粉生产工艺流程、主要生产设备,着重描述了控制氨基模模塑粉生产质量的干燥技术,进行厢式烘干技术和网带烘干技术对产品质量影响的比较,尤其是能耗的比较,结果表明,采用网带烘箱干燥技术大大地提高了产品的质量和稳定性,为企业节约了大量的能量,从而降低了生产成本,得到了较好的效果。     

汽车阻尼片生产线冷却成型工艺与设备的设计及运行

设计了汽车阻尼片生产过程中的冷却成形工艺及冷却水传送带主体设备。提出了设计制造过程中重点注意的问题。实际生产运行证实,制造后的10 m冷却传送线,20 s内将160℃的阻尼片连续降温到33℃,生产过程连续,设备运行稳定,满足了生产中的降温要求,改善了生产的环境状况。同时,为汽车阻尼片生产提供了新型冷却成型工艺及设备。     

新能源汽车全塑车身先进制造技术

轻量化技术是当前汽车节能、减少污染的最有效途径之一,全塑车身成型方法是突破汽车轻量化的关键技术,应用旋塑成型工艺可以实现汽车车身塑化制造的整体成型。本文主要介绍全塑车身的整体轻量化设计、成型设备、车身模具、加工工艺的先进制造技术,并对其进行研究对比试验。结果表明：应用计算机辅助设计、机电控制和高分子材料等领域的先进技术,通过对旋塑设备进行热流分析与能效优化,采用模具内无线测温技术、模具单元分块快速开合模技术和微发泡技术可以满足全塑车身整体一次成型。     

广西鹿寨400 kt/a硫酸装置设计综述(待续)

介绍了广西鹿寨 4 0 0kt/a硫酸装置的设计及相关工作的情况 ,就该装置的技术基础条件、招标和评标、采购的技术和装备、设备布置原则和生产线的选择、技术特点、工艺过程和生产控制、主要设备的技术特性、主要技术经济指标、工程竣工和验收等方面进行了综述。该装置已按批准的设计内容建成 ,并通过投料试车和生产考核 ,其生产能力和主要技术经济指标均达到了设计要求 ,设计合理、技术先进 ,已通过了竣工验收     

微孔发泡注塑成型工艺及其设备的技术进展

微孔发泡注塑技术是实现塑料轻量化设计的重要途径。在简要回顾微孔塑料发泡注塑成型工艺的基础上,重点介绍了微孔发泡注塑成型设备的发展动向。从注气、塑化、注射、模具和辅助系统等五个模块,分析总结工艺要求及多种国外产业端的先进设备特点和解决方案。文中重点论述多个成功应用的生产设备创新案例,并对微孔发泡注塑成型技术和设备的未来发展趋势进行展望。